TW201219333A - having a refractivity (nd) greater than 1.80 and an Abbe number (vd) ranging from 35 to 50 - Google Patents

Abstract

The purpose of the present invention is to provide, with lower costs, a type of glass with a refractivity (nd) and Abbe number (vd) in an expected range and higher devitrification tolerance. The optical glass of the present invention, relative to the total mass% of the glass composition in terms of oxide, comprises 1.0-30.0% of B2O3, 10.0-50.0% of La2O3 and less than 20.0% of Ta2O5. In addition, the optical glass has a refractivity (nd) greater than 1.80 and an Abbe number (vd) ranging from 35 to 50. In the optical element of the present invention, the optical glass is defined as a main substrate.

Description

201219333 VI. Description of the Invention: [Technical Field of the Invention] The present invention relates to an optical glass and an optical element. [Prior Art] In recent years, the digitization or high definition of machines using optical systems has been rapidly developed, such as digital cameras such as digital cameras or cameras, or image playback (projection) machines such as projectors or projection televisions. In the field, it is strongly demanded to reduce the number of optical elements such as lenses and prisms used in optical systems, and to reduce the weight and size of the optical system as a whole. In the optical glass in which the optical element is produced, in particular, the refractive index (nd) having a refractive index (nd) of 1.80 or more and having an Abbe number (Vd) of 35 or more and 50 or less can be reduced in weight and size of the optical system as a whole. The demand for dispersive glass has become very south. As such a high refractive index low dispersion glass, a glass composition represented by Patent Documents 1 to 4 is known. [PRIOR ART DOCUMENT] [Patent Document 1] Japanese Patent Laid-Open Publication No. 2001-348244 [Patent Document 2] Japanese Patent Laid-Open Publication No. Hei 2-6-〇16293 (Patent Document 3) [Patent Document 4] Japanese Patent Laid-Open Publication No. JP-A No. 2-9-9A No. 83-A SUMMARY OF INVENTION [Problems to be Solved by the Invention] As a method of producing an optical element from an optical surface, for example, the following is known. Method: a method of grinding a glass paste ball or a glass brick formed by an optical surface and grinding the 158137.doc 201219333 to obtain a shape of an optical element; reheating and forming a glass paste ball or a glass brick formed by the optical glass a method of grinding and grinding a glass molded body obtained by reheating pressure forming; and molding a preformed material obtained by a glass paste ball or a glass brick by a superfine processing die (precision mold pressure forming) A method of obtaining the shape of an optical element. Either method is required to reduce the devitrification of the formed glass when forming a glass paste ball or a glass brick from the molten glass raw material. Here, in the case where devitrification occurs due to crystallization occurring inside the obtained glass paste ball or glass tile, a preferable glass is not obtained as an optical element. Further, in order to reduce the material cost of the optical glass, it is desirable that the cost of the raw materials constituting the components of the optical glass be as inexpensive as possible. Further, in order to reduce the manufacturing cost of the optical glass, it is desirable that the melting property of the raw material is high, that is, it is melted at a lower temperature. However, the glass compositions described in Patent Documents 1 to 4 are not suitable for those various requirements. The present invention has been made in view of the above problems, and an object thereof is to obtain a glass having a refractive index (nd) and an Abbe number (Vd) within a desired range and having high devitrification resistance at a lower cost. [Means for Solving the Problem] The inventors of the present invention have conducted intensive experimental research in order to solve the above problems, and as a result, it has been found that by reducing the content of the LA5 component relative to the glass containing the yttrium 3 and the La 2 〇 3 component, The present invention has been achieved by making the glass have a desired refractive index and Abbe number, and the material cost of the glass is lowered, and the liquidus temperature of the glass is lowered. Specifically, the present invention provides the following. 158137.doc 201219333 (1) An optical glass containing b2〇3 component 丨0~30 0%&La2〇3 component in mass% with respect to the total mass of the oxide-converted composition; 10.0~55.0% And the content of the component of Ding 3205 is 2% or less. (2) The optical glass according to the above (1), which contains, in the oxide-converted composition, one or more of the group consisting of the Ti 2 component, the Nb 2 5 component, and the W 3 component. (3) The optical glass of the above (2), wherein the sum of the content of the optical glass selected from the group consisting of the diced component, the quinone 5 component, and the W03 component is the total mass of the glass in terms of the oxide conversion composition. 〇·5% or more and 4% or less. (4) The optical glass according to the above (2) or (3), which is mass based on the total mass of the glass composed of the oxide conversion. /. The meter contains:

Ti02 component 0 to 20.0% and/or Nb205 component 〇 20.0% and/or W03 component 0 to 25.0%. (5) The optical glass according to any one of the above (1) to (4), which further contains the following components in mass % with respect to the total mass of the glass in the composition of the oxide:

Si〇2 component 0~20.0% and/or Zr02 component 〇~12.0%. (6) The optical glass according to any one of the above (1) to (5), wherein the sum of the content of the component and the s i 02 component is 0.25% or less based on the total mass of the oxide-converted composition. (7) The optical glass according to any one of (1) to (6) above, wherein the mass ratio of the oxide-converted composition (Zr02+Ta205+Nb205)/(B203 + SiO2) is 2.00 to 158137.doc •5· 201219333 • · Next. (8) The optical glass according to any one of the above (1) to (7), which further contains the following components in mass % with respect to the total mass of the glass in the composition of the oxide:

Gd203 component 〇~45.0% and/or Y2O3 component 〇~30.0% and/or Yb203 component 〇~20.0%. (9) The optical glass according to any one of (1) to (8), wherein the Ln2〇3 component (wherein Ln is one or more selected from the group consisting of La, Gd, Y, and Yb) The mass of the material and the total composition of the glass in terms of oxide conversion is 30.0% or more and 75.0% or less. (10) The optical glass according to (9) above, wherein the Lii2〇3 component (wherein Ln is one or more selected from the group consisting of La, Gd, Y, and Yb) has a mass and is converted with respect to the oxide. The total mass of the glass is more than 4%. (11) The optical glass according to any one of the above (1) to (10), wherein the mass ratio of the oxide-converted composition Ta205/(Ln203 + Zr02+Nb205 + W03) is 0.300 or less (in the formula, Ln is set to Select one or more of the group consisting of La, Gd, Y, and Yb). (12) The optical glass according to any one of the above (1) to (11), which further contains the following components in mass % with respect to the total mass of the glass of the oxide conversion composition:

MgO composition 〇~20.0% and/or CaO component 〇~20.0% and/or SrO component 0~20.0% and/or 158l37.doc 201219333

BaO composition 〇~25.〇〇/. . (13) The optical glass according to the above (12), wherein the mass of the RO component (wherein R is one or more selected from the group consisting of Mg, Ca, Sr, and Ba) and the composition of the oxide The total mass of the glass is 25. or less. (14) The optical glass of any one of the above-mentioned (" to ^), which contains the following components in terms of mass% of the total mass of the glass in terms of oxide conversion composition.

Li2◦ component 0~1 〇·〇% and/or Na2〇 component 0~10.0% and/or K20 component 0~1 〇·〇% and/or Cs20 component 0~10.0%. (15) The optical glass according to the above (14), wherein the Rn20 component (wherein Rn is one or more selected from the group consisting of Li, Na, K, and Cs) and the glass in terms of oxides The total mass is 丨5.〇% or less. (16) The optical glass according to any one of the above (1) to (15), wherein the mass ratio of the oxide-converted composition (B203 + SiO 2 + W03) / (Ln203 + Zr02 + Li 20) is 0.20 or more and 2,00 or less . (17) The optical glass according to any one of the above (1) to (16), which further contains, in mass%, the following components: P2O5 component 〇10.0 °/. And/or GeCb component 0~ΐ〇·〇% and/or ZnO component 0~25.0°/. And/or Al2〇3 ingredients 0~10.0% and/or

158137.doc 201219333

Ga2〇3 component 〇~1 〇.〇% and/or Bi203 component 0~20.0% and/or Te02 component 0-20.0% and/or Sn〇2 component 0~1, 〇% and/or Sb203 component 0~1.0 %. (18) The optical glass according to any one of the above (1) to (17) which has a refractive index (nd)' of 175 or more and an Abbe number (Vd) of 3 Å or more and 50 or less. (19) The optical glass according to any one of (1) to (18) above which has a liquidus temperature of 1300 ° C or lower. (20) An optical element, wherein the optical glass according to any one of the above (1) to (19) is used as a base material. (21) An optical device which has the optical element as described above (2). [Effect of the Invention] According to the present invention, the glass has a desired refractive index and Abbe number by reducing the content of the bismuth & 2 〇 5 component relative to the glass containing the B 2 〇 3 component and the La 2 〇 3 component, and The glass transfer point is lowered and the material cost of the glass is lowered. Therefore, an optical glass having a refractive index (nd) and an Abbe number (Vd) within a desired range and having high devitrification resistance can be obtained at a lower cost. [Embodiment] The optical glass of the present invention has a mass based on the total mass of the glass in terms of oxide composition. The composition contains B2〇3 components 1〇~3〇 〇% and La2〇3 components 1〇 〇~ 50'0/〇, and the content of Ta2〇5 component is 20.0. /. the following. Since the amount of the component of the TaW5 component which is expensive and which needs to be melted at a high temperature is reduced, the raw material cost and manufacturing cost of the optical glass are lowered by 158137.doc 201219333. At the same time, the B2〇3 component and the La203 component are used as the base, and have a refractive index (nd) of 1.80 or more and an Abbe number (vd) of 35 or more and 50 or less, and the liquidus temperature tends to be low. Therefore, an optical glass having a refractive index (nd) and an Abbe number (Vd) within a desired range and having high devitrification resistance can be obtained at a lower cost, and an optical element using the same can be obtained. Hereinafter, embodiments of the optical glass of the present invention will be described in detail. The present invention is not limited to the following embodiments, and may be appropriately modified within the scope of the invention. In addition, the description of the repeated description is omitted as appropriate, and the scope of the invention is not limited. [Glass Component] The composition range of each component constituting the optical glass of the present invention will be described below. In the case where there is no particular description in the specification, the content of each component is expressed by mass% based on the total mass of the glass in terms of oxide composition. Here, the term "oxide-converting composition" means that the oxide, the composite salt, and the metal fluoride which are used as the raw material of the glass constituent component of the present invention are equal to the case where they are all decomposed and become oxides upon melting. The total mass of the oxide is set to 1% by mass, and the composition of each component contained in the glass is described. 77 <Required component, optional component> The b2〇3 component is an essential component which is indispensable for forming an oxide of glass in the optical slab of the present invention containing a rare earth oxide in a large amount. In particular, it is because the "ship content is (10) or more, the glass resistance can be improved" and the dispersion of the glass can be reduced. Therefore, the content of the B203 component is preferably "the total mass of the glass of the composition of the core (4)", and the i G% is set to the lower limit of 158I37.doc 201219333, more preferably 5.0. /. The lower limit is set, and it is preferable to set 85% as the lower limit, and it is preferable to set 1 〇.〇% as the lower limit. On the other hand, 'the content of the B2〇3 component is 30.0% or less, and the content of the mB2〇3 component which can easily obtain a larger refractive index and suppress chemical durability can be easily obtained with respect to the total mass of the glass of the oxide conversion composition. It is preferable to set 3〇〇% as the upper limit. More preferably, 2G.G% is set as the upper limit, and further preferably 18 ()% is set as the upper limit, and it is preferable to set 15.0% as the upper limit. For example, the component 3 can be used, for example, h3b〇3.

Naj^7, Na2B4〇7.1〇H2〇, Bp〇4 and the like are contained in the glass as a raw material.

The LazO3 component is a component that increases the refractive index of the glass and reduces the dispersion of the glass to increase the Abbe number. In particular, by setting the content of the La2〇3 component to 10.0% or more, the refractive index of the glass can be increased. Therefore, the yttrium of the component is preferably 10.0% as the lower limit, more preferably 2 GG% as the lower limit, and more preferably 25.0% as the lower limit, and more preferably the yttrium of the component. It will be set to the lower limit. On the other hand, by making the content of the La2〇3 component 55 〇% or less, more preferably 5 〇% or less, the durability of the glass can be improved, and the devitrification of the glass can be reduced. Therefore, the content of the Lh〇3 component is preferably 55.0% as the upper limit, more preferably 5〇〇% as the upper limit, and still more preferably 49.0% as the total mass of the glass in terms of the oxide conversion composition. The upper limit and the best is to set 48 〇% as the upper limit. The [magic component] can be contained in the glass using, for example, La2〇3, La(N〇3)rXH2〇 (X is an arbitrary integer) or the like as a raw material.

The Ta2〇5 component is a component which increases the refractive index of the glass and improves the resistance to devitrification by lowering the liquid phase temperature of the glass, and is a component of 158137.doc 201219333 in the optical glass of the present invention. In particular, by making the content of the Ta2〇5 component 20.0% or less, and reducing the content of the expensive Ta2〇5 component, it is possible to produce an optical glass having a desired optical constant at a lower material cost. On the other hand, if the content of the Ta2〇5 component exceeds 20.0%, it becomes difficult to obtain durable glass. Therefore, the content of the 'Ta2〇5 component relative to the total glass mass of the oxide-converted composition' is preferably 20.0% as the upper limit, and more preferably less than 17.5°/. Further preferably, it will be 13.9 〇 /. Set to the upper limit. Here, in particular, by lowering the content of the Ta2〇5 component to 9.5% or less, the temperature of the molten raw material can be lowered, and the energy required for melting the raw material is lowered, so that the manufacturing cost of the optical glass can be reduced. Therefore, in the viewpoint of the content of the τ & 2〇5 component, it is preferable to set the upper limit of the composition of the oxide-converted composition to 95%, and more preferably to set the upper limit of 7.0%. 5 〇% is set to the upper limit. On the other hand, when the content of the Ta2〇5 component is more than 5%, the coloring of the glass can be suppressed and the refractive index of the glass can be increased, and the devitrification resistance of the glass can be improved. Therefore, the content of the ThO5 component of the viewpoint t is preferably more than 95% with respect to the total mass of the glass of the oxide-converted composition, more preferably 11.0% is set as the lower limit, and further preferably 128% is set as the lower limit. . The publication component can be contained in the glass using, for example, ThO5 or the like as a raw material. The optical glass of the present invention preferably contains at least one selected from the group consisting of a butyl component, a w〇3 component, and a Nb2〇5 component. Thereby, even if the material cost of the glass is lowered and the content of the bismuth component is lowered, the refractive index of the glass can be increased and the devitrification resistance of the glass can be improved. Therefore, the total mass of the glass selected from the group consisting of the content of the Ti 2 component, the Nb 205 component, and the w 〇 3 component is 158137.doc • 11 · 201219333 is preferably more In 〇%, it is more preferable to set 0·5% as the lower limit, and it is preferable to set 1·〇% as the lower limit. On the other hand, by setting the sum to 40% or less, it is possible to reduce the coloration caused by the components and the like, and it is possible to suppress the deterioration of the devitrification resistance caused by the excessive inclusion of the knives. Therefore, the content of one or more selected from the group consisting of the Ti〇2 component, the Nt»2〇5 component, and the w〇3 component is preferably 〇% in terms of the total mass of the glass in terms of oxide conversion composition. For the upper limit, it is more preferable to set 30% as the upper limit, and it is preferable to set 〇% as the upper limit. The best is to set 8.0% as the upper limit.

The Ti 2 component is a component which adjusts the refractive index and Abbe number of the glass and improves the resistance to devitrification, and is an optional component in the optical glass of the present invention. However, if there is too much Ti〇2, the devitrification resistance will be deteriorated. The transmittance of the glass having a short wavelength (below 5 Å nm) is also deteriorated. Therefore, the content of the Ti〇2 component is preferably set to an upper limit of 2〇 with respect to the total mass of the glass of the oxide exchange composition, and more preferably, the upper limit is set to 〇·〇%, and further preferably 8〇. % is set to the upper limit, and it is best to set 5.0% as the upper limit. The Ti〇2 component can be contained in the glass using, for example, Ti〇2 as a raw material.

The NhO5 component is a component which increases the refractive index and dispersion of the glass and is an optional component in the optical glass of the present invention. In particular, by making the content of the component of 2?2〇5 20.0% or less, deterioration of the devitrification resistance of the glass due to the excessive inclusion of the #Nb2〇5 component can be suppressed, and the penetration of the visible light of the glass can be suppressed. The rate is reduced. Therefore, the content of the NhO5 component is preferably an upper limit of 2 〇 〇 %, more preferably 15.0%, and most preferably 12 〇 % as an upper limit with respect to the total mass of the glass of the oxide conversion composition. The Nb2〇5 component can be contained in the glass using, for example, Nb2〇5 or the like as a raw material. I58137.doc -12- 201219333 wo; The composition is to increase the refractive index and dispersion of the glass, and to improve the resistance of the glass. In particular, by setting the content of the w〇3 component to 25 〇%, more preferably 20.0% or less, the coloring of the glass can be lowered, and in particular, the transmittance in the visible-short wavelength region (below 500 nm) is hard to be lowered. . Therefore, the content of the w〇3 component is preferably 25.0% as the upper limit, more preferably 2%% as the upper limit, and even more preferably 15.0%. The upper limit is best to set 12 〇% as the upper limit. Further, although the optical glass of the present invention can obtain a glass having a desired optical constant and resistance to devitrification without containing the W〇3 component, the liquid phase temperature of the glass can be further lowered by containing the w〇3 component. Therefore, the resistance to devitrification of the glass can be further improved. The total mass of the glass of the composition of the 'w〇3 component relative to the oxide conversion composition is preferably more than 〇%, more preferably 〇1% is set. The lower limit is preferably set to 1.0% as the lower limit. The W〇3 component can be contained in the glass using, for example, the touch 3 or the like as a raw material.

The Si〇2 component is a component which is a component of the optical glass of the present invention in order to increase the viscosity of the molten glass, to promote the formation of a durable glass, and to reduce the component of devitrification (production of crystals) which is poor in optical glass. Especially by making

_^ containing 4 is 2()__7' suppresses the rise of the glass transition point (10) and suppresses the decrease in the refractive index. Therefore, it is preferable to set the content of the component to the total mass of the glass in terms of the oxide-converted composition, and it is preferable to set the upper limit of 2 g.〇% to the upper limit, and it is preferable to set the upper limit to ι〇%. Further, although it is not technically disadvantageous even if the Si〇2 component is not contained, since the liquid phase temperature of the glass is lowered by the SiQ2-containing component, the glass can be prevented from devitrifying. Therefore, the content of the component is preferably 0.1% as the lower limit, more preferably 1.0% as the lower limit, and more preferably 2.0%, based on the total mass of the glass of the composition of the oxidation 158137.doc 13 201219333. The lower limit. In particular, the content of the Si 2 component is preferably 4.0% or more in view of the fact that the Ti 2 component or the W 3 component is contained in the glass to make it difficult to color the glass. The si〇2 component can be contained in the glass using, for example, SiCb, KJiF6, NkSiF6 or the like as a raw material.

The Zr 2 component is a component which contributes to the refractive index and low dispersion of the glass and is an optional component in the optical glass of the present invention. However, if the amount of Zr〇2 is too large, the devitrification resistance is deteriorated. Therefore, the content of the Zr〇2 component is preferably set to an upper limit of 12% by weight based on the total mass of the glass of the oxide conversion composition, more preferably 10.0% is made the upper limit, and most preferably 80% is set as the upper limit. . Further, although the desired glass can be obtained even without the Zr〇2 component, by containing the Zr〇2 component, the high refractive index and low dispersion property can be easily obtained, and the improvement can be easily obtained. The effect of sex. Therefore, the content of the Zr〇2 component is preferably more than 〇%' with respect to the total mass of the glass of the oxide-converted composition, and more preferably 0.5% is set as the lower limit, and most preferably 〇% is set to the lower:.

The Zr〇2 component can be contained in the glass using, for example, Zr〇2, ZrF4 or the like as a raw material. The optical glass of the present invention preferably has a mass of the Ah component and the Si 〇 2 component of 25.0% and more preferably T ' of 23.0% or less. This makes it possible to suppress a decrease in the refractive index due to the 1 B2 〇 3 component and the SiO 2 component, so that a desired higher refractive index can be obtained. Therefore, the quality of the bismuth component and the training and the total mass of the glass relative to the oxide conversion composition are (1) 25.0% is set as the upper limit', and 23 ()% is set as the upper limit, and further, 14-158137.doc

201219333 Set 21.0% as the upper limit, and optimally set it to less than 2〇.〇〇/0 β. In the optical glass of the present invention, the mass and (Zr〇2+Ta2〇5+Nb2〇5) and mass and The ratio of (B2〇3 + Si〇2) is preferably 2〇〇 or less. Since the content of the Zr 2 component, the Ta 2 5 component, and the Nb 2 5 component having a high material cost is lowered, the desired optical glass having a lower liquidus temperature can be produced at a lower cost. Therefore, the mass ratio of the oxide-converted composition (Zr〇2+Ta2〇5 + Nb2〇5)/(B2〇3 + Si〇2) is preferably set to an upper limit of 2.00, and more preferably set to 丨8〇. The upper limit is best to set 1.5 〇 as the upper limit.

The Gd2〇3 component is a refractive index of the glass which is raised, and the component of the Abbe number is increased, which is an arbitrary component in the optical glass of the present invention. In particular, when the content of the Gd2〇3 component is 45.0% or less, more preferably 4% by weight or less, the desired optical constant of the glass can be easily obtained, and the excessive inclusion of Gd2〇3 can be suppressed. The increase in the glass transition point (Tg) produced by the composition and the resistance to devitrification of the glass. Moreover, by reducing the composition of 〇3 by φ, the material cost of the optical glass can be reduced. Gj, the content of the Gd2C>3 component is preferably 45.0% as the upper limit, more preferably 40.0% as the upper limit, and more preferably the upper limit, the most Jiawei sets 25.0% as the upper limit. Further, even if it does not contain the ingredients, it is not technically disadvantageous, but since it contains more than 〇%, the liquidus temperature of the glass can be lowered, so that the devitrification resistance can be improved. Therefore, (9) in the case of a knife, the composition of the glass relative to the oxide conversion, more please, better to be considered as the lower limit, and then better to the lower limit here, Shen by the glass refractive index and From the viewpoint of the number of shells and the desired optical constant, the Gd2〇3 component contains I58137.doc •15·201219333, and the total mass of the glass is preferably more than 5·〇. % ' is better to set 5.5% to the lower limit, and it is best to set 6.0% to the lower limit. Further, from the viewpoint of further improving the resistance to devitrification of the glass, the ratio of the content of the Gd2〇3 component to the content of the La2〇3 component (Gd2〇3/La203) is preferably 〇.1 or more and 2.00 or less. Jiawei 03·03 and above 17〇, the best is 〇〇5 or more and 1.5〇 or less. The Gd2〇3 component can be contained in the glass using, for example, Gd2〇3, GdF3 or the like as a raw material. The Y2〇3 component and the Yt>2〇3 component are components which increase the refractive index of the glass and reduce the dispersion, and are arbitrary components in the optical glass of the present invention. In particular, by setting the content of the Y2〇3 component to 30.0% or less, and/or by making the content of the ¥1)2〇3 component 20.0% or less, it is easy to obtain the desired optical constant of the glass. It can improve the resistance to devitrification of glass. Therefore, it is preferable that the content of the ''Ο' component is equal to the total mass of the glass of the oxide-converted composition, and it is preferable to set 30_0% as the upper 1: 艮, and more preferably to set the upper limit to 25 〇%. To set 15.0% as the upper limit. Therefore, the amount of γ = the amount of the knives is preferably 20.0% as the upper limit, and more preferably 15 〇% as the upper limit, and more preferably 10.0%. The upper limit. The γ Λ 八 八 丨艮Υ 丨艮Υ 〇 〇 〇 〇 〇 成分 成分 成分 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 The 'Ln2〇3 component in the optical glass of the present invention (in the formula,

The mass of one or more of the groups consisting of La Gd, Y, and Yb is preferably 30.0% or more and 75. G% or less, more preferably. the following. In particular, by making the amount of f of the Ln2〇3 component and then the transmittance and the Abbe number of % or more, it is possible to easily obtain the desired refractive index of 158137.doc 201219333 and Abbe. Number of glass. Therefore, the mass and relative mass of the Ln2〇3 component and the total mass of the glass in terms of oxide conversion are preferably set to the lower limit, preferably 33.G% as the lower limit and more preferably more than 4 (). 〇%, the best is more than 55.0%. On the other hand, since the mass of the Ln2〇3 component is 75·0/〇 or less, the liquidus temperature of the glass becomes low, so that devitrification of the glass can be reduced. Therefore, the mass of the Ln2〇3 component and the total mass of the glass with respect to the oxide-converted composition are preferably 75 〇% as the upper limit, more preferably 70.0% as the upper limit, and further preferably 65 〇%. It is preferable that the upper limit is 60.0% as the upper limit, and it is preferable to set 55 〇% as the upper limit. In the optical glass of the present invention, the ratio of the content and mass of the ThO5 component to (Ln203 + Zr 〇 2 + Nb 2 〇 5 + w 〇 3) is preferably 〇 3 〇〇 or less. Since the content of the Ta2〇5 component having a high material cost among the components for increasing the refractive index is lowered, the optical glass having a high refractive index can be produced at a lower cost. Therefore, it is preferable to set the mass ratio of the total mass of the glass of the composition of the oxide to Ta2〇5/(Ln2〇3+Zr〇2+Nb2〇5+W〇3) to 〇.3〇〇 as the upper limit, more preferably Setting 0.280 as the upper limit is best to set 〇25〇 as the upper limit.

The MgO component, the Ca0 component, the Sr0 component, and the Ba〇 component are components which adjust the refractive index, meltability, and devitrification property of the glass, and are arbitrary components in the optical glass of the present invention. In particular, the content of each of the MgO component, the ca0 component, the Sr component, and the Ba0 component is 20.0% or less, and/or

When the content of the BaO component is 25.0% or less, the decrease in the refractive index due to the components is suppressed, whereby the desired refractive index can be easily obtained, and the glass which is produced by excessively containing the components can be reduced. Destruction. Therefore, the content of each of the Mg 〇 component, the CaO component, and the SrO component is preferably an upper limit of 2% by weight based on the total mass of the glass of the λί'ν 158137.doc 17 201219333 oxide conversion composition, and more preferably 10.0% is set as the upper limit, and it is best to set 5 〇% as the upper limit. Further, in the total amount of the glass component of the oxide composition, it is preferable to set 25.0% as the upper limit, more preferably 15% to 5% as the upper limit, and most preferably 10.0% as the upper limit. For the Mg0 component, the Ca0 component, the $r〇 component, and the BaO component, for example, MgC〇3, MgF2, ~, and (10)2 can be used.

Sr(N03)2, SrF2, BaC〇3, Ba(N〇3)2, and ruthenium are contained in the glass as a raw material. In the optical glass of the present invention, the total content of the R 〇 component (wherein R is one or more selected from the group consisting of *Mg, Ca, Sr, and Ba) is preferably 25.0% or less. Thereby, the desired refractive index can be easily obtained by suppressing the decrease in the refractive index due to the composition of the ruthenium. Therefore, the mass of the R 〇 component and the total mass of the glass in terms of the oxide conversion composition are preferably 25.0% as the upper limit, more preferably 15 〇% as the upper limit, and further preferably less than 12.0%. 'The best is set to less than 1〇〇0/. .

The LhO component, the NaW component, the ho component, and the CS2 bismuth component are components which improve the meltability of the glass and lower the glass transition point, and are any components of the optical glass of the present invention. Among them, the Ν & 2 〇 component, the K 2 〇 component, and the 〇 2 〇 component are also components which improve the resistance to devitrification of the glass. In particular, when the content of each of the component (4), the NMD component, the bismuth component, and the CS2 component is 1% by weight or less, the refractive index of the glass is hardly lowered, and the durability of the glass is improved, and the occurrence of devitrification or the like is reduced. . Therefore, the content of each of the Li" component, the Naz〇 component, the K2〇 component, and the ChO component is preferably 10.0% as the upper limit, and more preferably 158137. Doc 201219333 is the upper limit, and the best is to set 5.0% as the upper limit. As the Li2〇 component, the Na2〇 component, the K2〇 component, and the Cs20 component, for example, Li2c〇3, LiN〇3, or the like can be used.

Li2C03, NaN03, NaF, Na2SiF6, K2C03, KN〇3, KF, KHF2, K2SiF6, Cs2C〇3, CsN〇3 and the like are contained in the glass as a raw material.

The Rn2 〇 component (wherein Rn is one or more selected from the group consisting of Li, Na, K, and Cs) is a component which lowers the meltability of the glass and reduces the devitrification of the glass. Here, when the total content of the Rr^O components is 15.0% or less, the refractive index of the glass is hardly lowered, the durability of the glass is improved, and the occurrence of devitrification or the like is reduced. Therefore, the mass of the Rn2 component and the total mass of the glass in terms of the oxide-converted composition are preferably 15 〇% as the upper limit 'more preferably 10.0% as the upper limit'. . In the optical glass of the present invention, the ratio of the mass and (B2〇3 + si〇2+w〇3) to the mass and (Ln2〇3+Zr〇2+Li2〇) is preferably 〇2〇 or more 2 〇〇. The following 'better is 0.27 or more and 2.00 or less. In particular, by setting the ratio to 〇.27 or more, the component having a devitrification resistance is improved with respect to the content of the component (Ln2〇3 component, zr〇2 component, and LLO component) which reduces devitrification resistance (b2) The content of 〇3 component, Si〇2 component, and WO3) is increased, so that an optical glass having a lower liquidus temperature and more difficult to devitrify can be obtained. On the other hand, since the Ln2〇3 component which is a component for increasing the refractive index and the Abbe number is easily contained in the glass by setting the ratio to 2.00 or less', the desired refractive index can be easily obtained. Number of shells. Therefore, the mass ratio of the composition of the telluride (B203 + SiO 2 + W03) / (Ln203 + Zr02 + Li20) is preferably set to 0.20 to the lower limit of 158137.doc -19 - 201219333, and more preferably 0.27 as the lower limit. Further, it is preferable to set 〇28 to the lower limit, and it is preferable to set 〇.29 as the lower limit. Further, it is preferable that the quality is 2 〇〇 as the upper limit, and it is more preferable to set the 别 to the upper limit, and it is preferable to set 1 〇〇 as the upper limit. The component 2〇5 is a component having an effect of lowering the liquidus temperature of the glass and improving the devitrification resistance, and is an optional component in the optical glass of the present invention. In particular, since the content of the Ρ2〇5 component is 1% by weight or less, the chemical durability of the glass, particularly the water resistance, can be suppressed. Therefore, the content of the LA component is preferably an upper limit of 1% by weight, more preferably 8.0% as an upper limit, and most preferably an upper limit of 5.% by weight. . The Ρ2〇5 component can be contained in the glass using, for example, Α1(Ρ〇3)3, Ca(p〇3)2, Ba(p〇3)2, BPO4, HsPO4 or the like as a raw material.

The Ge02 component is a component having an effect of increasing the refractive index of the glass and improving the resistance to devitrification, and is an optional component in the optical glass of the present invention. However, GeOJ has a higher raw material price, so if the amount is high, the production cost becomes high, and the effect of lowering the Ta2〇5 component is reduced. Therefore, the content of the Ge02 component is preferably 10.0 based on the total mass of the glass of the oxide conversion composition. /. It is set as the upper limit, and it is more preferable to set 5〇% as the upper limit, and it is preferable to set 1·0% as the upper limit. G e π 士 , 八 * τ * from m / · e 〇 2 into a knife can be contained in the glass using, for example, Ge 〇 2 or the like as a raw material.

The Zn 〇 component is a component which reduces the break-through transfer temperature (for example, a component which improves chemical durability) is an arbitrary component in the optical glass of the present invention. However, if the content of the Zn 〇 component is too large, the glass devitrification property becomes easy. Deterioration. Therefore, the content of the ZnO component is 158137.doc -20· 201219333 相对 with respect to the oxide-converted composition. It is preferable to set 25.03⁄4 as the upper limit, and more preferably to set the upper limit to 2〇〇%. It is preferable to set the upper limit of 15.0°/., and it is preferable to set 丨〇〇% as the upper limit. Further, although the glass having the desired characteristics can be obtained even if the Zn0 component is not contained, the ZnO is contained. Since the glass transition point of the component is lowered, pressure forming can be easily performed, and the optical glass can be easily obtained.

The content of the Zn bismuth component is preferably more than 0% based on the total mass of the glass in terms of oxide composition, and more preferably 〇.1% is the lower limit, and most preferably 丨〇% is set as the lower limit. The ZnQ component can be contained in the glass using, for example, Ζη〇, ZnF2 or the like as a raw material.

The Al2〇3 component and the Ga2〇3 component are components which improve the chemical durability of the glass and improve the resistance to devitrification of the molten glass, and are any components of the optical glass of the present invention. In particular, by setting the content of each of the octagonal 2 〇 3 component and the GhO 3 component to 10.0% or less, the devitrification tendency of the glass can be weakened, and the durability of the glass can be improved. Therefore, the content of each of the AI2〇3 component and the Ga2〇3 component is preferably 10% of the total weight of the glass, and more preferably 8.0% is the upper limit, and most preferably 5 〇% is set to the upper limit. As the raw material, it is contained in the glass, for example, Al2〇3, a1(〇h)3'A%, Ga2〇3, Ga(OH)3 or the like.

The Bi2〇3 component is a component which increases the refractive index and lowers the glass transition point (dg), and is an optional component in the optical glass of the present invention. In particular, by setting the content of the other 2 〇 3 component to 20.0% or less, the increase in the liquidus temperature is suppressed, so that the deterioration of the devitrification resistance of the glass can be suppressed. Further, by setting the content of the 2〇3 component to 20.0% or less, the coloring of the glass can be reduced. Therefore, it is preferable to set the content of the 2〇3 component to the total mass of the glass in terms of oxide conversion, preferably 158137.doc -21 - 201219333 20.0% as the upper limit, and more preferably 15 〇% as the upper limit, preferably Set to the upper limit. The Bi2〇3 component can be contained in the glass using, for example, Bi2〇3 as a raw material.

The Te〇2 component is a component which increases the refractive index and lowers the glass transition point and is an optional component in the optical glass of the present invention. However, Te〇2 has a problem in that it can be alloyed with platinum when it is in the event of platinum or when it is in contact with the molten glass in the molten bath formed of white gold. Therefore, the content of the L〇2 component is preferably 20.0% as the upper limit, more preferably 15%% as the upper limit, and most preferably (7)% is the upper limit. . The Te〇2 component can be contained in the glass using, for example, butyl ruthenium or the like as a raw material.

The Sn 2 component is a component which is a component of the light-drying glass of the present invention which is a component which is a component of the light-drying glass of the present invention which is a component which is used for the light-drying glass of the present invention to reduce the oxidation of the molten glass and to clarify the molten glass, and to make the transmittance of the glass difficult to deteriorate. In particular, by reducing the content of the Sn 〇 2 component to 1.0% or less, it is difficult to cause devitrification of the molten glass or devitrification of the glass. Further, since the alloying of the component (10) and the glass = (especially, a noble metal such as Pt) is lowered, the life of the melting device can be prolonged. Therefore, the content of the Sn02 component is preferably 10% of the upper limit, and more preferably 0.7% of the upper limit, and more preferably 〇.5% is the upper limit. As the Sn 2 component, for example, SnO, Sn 2 , SnF 2 , SnF 4 or the like can be used as a raw material and contained in the glass.

The component Sb2〇3 is a component which defoams the molten glass and is an optional component in the optical glass of the present invention. If the amount of Sb2〇3 is too large, the transmittance in the visible region is short. 158I37.doc -22- 201219333 The transmittance in the wavelength region is deteriorated. Therefore, the content of the Sb203 component is preferably 1·〇% as the upper limit, more preferably 0.7% as the upper limit, and most preferably 0.5% as the upper limit ^ Sb2〇. The component 3 can be contained in the glass using, for example, Sb2〇3, Sb205, Na2H2Sb207.5H20 or the like as a raw material. Further, the component for clarifying the glass and defoaming is not limited to the above-mentioned Sb203 forming tool, and a known clarifying agent, antifoaming agent or a combination thereof can be used in the field of glass manufacturing. <Components which should not be contained> Next, the components which should not be contained in the optical glass of the present invention, and components which are preferably not contained will be described. Other ingredients may be added as needed insofar as they do not impair the characteristics of the glass of the invention of the present application. Among them, due to the addition of Ti, Zr, Nb, w, La,

Other than Gd, Y, Yb, and Lu, v, Cr, Μη, Fe, Co, Ni, Cu,

When each of the transition metal components such as Ag and Mo is contained in a small amount, either alone or in combination, it has a coloration of glass and absorbs a specific wavelength of a visible light range, especially in an optical glass using a wavelength of a visible region. Jia is not actually included. Further, since a lead compound such as pb〇 or an arsenic compound such as AS2〇3 is a component having a high environmental load, it is preferably substantially not contained, i.e., it is not contained except for inevitable mixing. Further, the components of Th, Cd, yttrium, Os, Be, and Se have been in a controlled use as harmful chemical materials in recent years, and it is considered that not only the manufacturing steps of the glass but also the processing steps and the processing after the productization require an environment. 158137.doc -23- 201219333 Measures for countermeasures. Therefore, when it is preferable that the glass composition of the present invention is substantially not contained in the case where the environmental impact is important, the composition of the glass composition of the present invention is represented by the mass % of the total mass of the glass in terms of oxide composition, and thus it is not possible to directly Although it is described in the description of the molars, it is described in the present invention that the components in the glass composition satisfying the various characteristics required are in the form of moles. /. The composition of the composition is approximately the following values in terms of oxide conversion composition. B2〇3 component 2.0~5 5.0 mol%, and

La2〇3 component 5.0~35.0% by mole, and

Ta2〇5 component 0~10.0 mol% and/or Ti02 component 0~30.0 mol% and/or Nb205 component 0-15,0 mol% and/or W03 component 0~30.0 mol. /. And / or Si02 ingredients 0 ~ 50.0 mol. /. And/or Zr02 component 0~18.0 mol% and/or Gd203 component 0-25.0 mol% and/or Y2〇3 component 〇~20. 〇mol% and/or Yb203 component 〇~1〇.0 mol % and / or MgO component 0 ~ 50.0 mol % and / or CaO composition 0 ~ 4 〇. 〇 Moer % and / or SrO composition 0 ~ 30.0 mol% and / or BaO composition 0 ~ 35.0 mol. /. And/or Li2〇 composition 〇~30.〇莫耳°/〇 and/or 158137.doc -24- 201219333

Na20 ingredient 〇~25 〇mol% and / or K2 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 〇 及 及 及 及 及 及 及 及 及 及 及 及 及 及 及 及 及 及 及 及 1 1 1 1 1 1 1 1 1 / or Ge〇2 composition 〇 ~ 1 〇〇 Moer % and / or Zn 〇 composition 〇 ~ 50.0 Mo. /. And/or Α1ζ〇3 ingredient 〇~15〇mol% and/or Ga203 component 〇~5 〇mol% and/or Bi203 component 0~10 〇mol% and/or Te02 component 〇~25〇mole% And/or Sb203 component 〇~〇5 mol% [Production method] The optical glass of the present invention can be produced, for example, in the following manner. In other words, the above-mentioned raw materials are mixed in a manner in which the respective components are within a specific content range, and the mixture prepared by the Asians is put into the platinum suspension, and the glass composition is melted. The difficulty is utilized in the electric furnace at i i(10)~i In the temperature range of 5QQ()C, when the mixture is homogenized, the mixture is homogenized, and then it is reduced to the appropriate temperature and then washed in the mold and slowly cooled. [Physical property] The optical glass of the present invention must have a high refractive index (η. and a low dispersion: especially the refractive index (9) of the optical glass of the present invention). Preferably, the lower limit of:·=: Will be. It is preferable to set the lower limit, and it is preferable to set the 185 to the lower limit. In addition, the Abbe number (10) of the glass of the present invention is preferably sold as a lower limit, and it is more desirable to set the lower limit of the 158I37.doc •25-201219333, and it is preferable to set 37 as the lower limit, preferably 39. The lower limit is preferably set to 5 〇 as the upper limit, more preferably 47 is set as the upper limit, and it is preferable to set 45 as the upper limit. Thereby, the degree of freedom of the optical design can be expanded, and even if the U is thinned, the refractive amount of the larger light can be obtained. Further, the upper limit of the refractive index of the optical glass of the present invention is, for example, 2 Å or less, more specifically 1 > 98 or less, and more specifically 丨 95 or less. Further, the optical glass of the present invention must have a high resistance to devitrification even if the content of the Τ & 2 〇 5 component is small. In particular, the optical glass of the present invention preferably has a lower liquidus temperature of 1300 C or less. More specifically, the liquidus temperature of the optical glass of the present invention is preferably set to 13 〇〇t: as the upper limit, more preferably 128 (TC is set as the upper limit, and most preferably 125 (Γ (: is set as the upper limit) Thereby, even if the molten glass flows out at a lower temperature, the crystallization of the produced glass is lowered, so that the devitrification resistance when the glass is formed from the molten state can be improved, and the optical component to the optical element using the glass can be reduced. Further, since the temperature of the glass can be stably formed, the glass can be molded and the energy consumed during the molding of the glass can be suppressed. The lower limit of the liquidus temperature of the optical glass of the present invention is not particularly limited, but the liquidus temperature of the glass obtained by the present invention is about 500 c or more, specifically 55 Å or more, and more specifically 60 (more than TC). In addition, the "liquidus temperature" in this specification is not in the platinum-filled crucible of 50 ml capacity, and the glass crumb-like glass sample of 3 cc is put into platinum. In 135 〇.〇 Completely molten, cooled to a specific temperature, and kept for 12 hours, taken out to the furnace 158l37.doc •26· 201219333 After external cooling, immediately observe the presence or absence of crystals on the glass surface and the glass, and the lowest temperature of crystallization is not observed. The specific temperature indicates a temperature set at 20 ° C for l3 〇 (rc to 1160 C. Further, the optical glass of the present invention preferably has less coloration. In particular, the optical glass of the present invention has a glass transmittance. In the case of expression, a sample having a thickness of 1 〇 mm indicates a wavelength at which the spectral transmittance is 70%, and is one of #% nm or less, more preferably 430 nm or less, and most preferably 400 nm or less. Further, the spectral transmittance is expressed. The wavelength of 5% (λ5) is 400 nm or less, more preferably 38 〇 nm or less, and most preferably 360 nm or less. Thereby, since the absorption limit of the glass is located near the ultraviolet region, the transparency of the glass in the visible light range is improved. Therefore, the optical glass can be preferably used as a material of an optical element such as a lens. Further, the optical glass of the present invention preferably has a lower partial dispersion ratio (0 g, F). More specifically, the optical of the present invention Glass department The ratio of the dispersion ratio (0g ' F) to the Abbe number (Vd) is satisfied (_2 5〇χ1〇.3χ~+〇.657ΐ)$ (0g,F)$(-2,5〇xl〇3xVd+〇.6971 The relationship between the optical elements formed by the optical glass can be reduced by the optical glass having a small partial dispersion ratio (9g, F). The partial dispersion ratio of the optical glass of the present invention (eg ' F) It is preferable to set (_2.5〇xl〇-3xVd+0.6571) as the lower limit, and it is better to set (-2.5〇xl〇-3xvd + 0_6591) to the lower limit, and the best is (-2.5〇xlO_3xVd) + 〇.6611) Set to the lower limit. On the other hand, the partial dispersion ratio (9g, F) of the optical glass of the present invention preferably sets (_2.5〇xl〇-3XVd+0.6971) as the upper limit' more preferably (_25〇xl〇-3XVd+〇6921) ) Set to the upper limit 'Best is to set (-2.5〇xl〇-3xVd+〇.6871) to the upper limit. [Glass molded body and optical element] 158137.doc -27-201219333 The glass molded body can be produced from the produced optical glass by means of, for example, a polishing process or a mold pressure forming method such as reheating pressure forming or precision press forming. g卩' can be used to fabricate a glass molded body by grinding or polishing the optical glass, or by reheating and forming a preform made of optical glass, and then grinding the preform to prepare a glass molded body. The preform formed by the processing or the preform formed by a known floating molding or the like is subjected to precision press forming to produce a glass molded body. Furthermore, the means for producing the glass molded body is not limited to these means. Thus, the glass formed body formed by the optical glass of the present invention can be used for various optical components and optical designs. Among them, it is particularly preferable to use an optical element such as a lens or a crucible. By this, it is possible to form a glass molded body having a large diameter, and it is possible to increase the size of the optical element, and to realize high-definition and high-precision imaging characteristics and projection characteristics when used in an optical device such as a camera or a projector. [Examples] The compositions of the examples (No. 1 to Ν ο 285), the reference examples (No. A to No. B), and the comparative examples (No. A to No. B) of the present invention, and the glass The refractive index (nd), the Abbe number (vd), the partial dispersion ratio (0g 'F), the liquidus temperature, and the wavelengths A and λ? indicating the spectral transmittance of 5% and 70%. The results are shown in Table 丨 ~ Table 3 8. Further, the following examples are for illustrative purposes only and are not limited to the examples. Any of the glasses of the examples (Νο·1 to No. 285), the reference examples (Νο.Α~Ν〇Β), and the comparative examples (No. Α~No.Β) of the present invention are each selected for oxidation. A high-purity raw material used for ordinary optical glass such as a substance, a hydroxide, a carbonate, a nitrate, a fluoride, a hydroxide or a metaphosphoric acid compound, as a raw material of each of the ingredients of 158137.doc • 28 - 201219333, Weighing and uniformly mixing the ratios of the compositions of the respective examples shown in Table 38, and then pouring them into a platinum crucible, and melting the glass composition in an electric furnace at a temperature of 1100 to 15 Torr (the temperature range of rc) After 2 to 5 hours, the mixture is homogenized, and then cast into a mold or the like and slowly cooled to prepare a glass. Here, Examples (No. 1 to No. 285) and Reference Examples (No. A to Ν〇·Β) The refractive index (nd), the Abbe number (Vd), and the partial dispersion ratio (0g 'F) of the glass of the comparative example (No. A to No. B) were measured based on the Japanese Optical Glass Industry Association specification JOGIS01-2003. And, for the obtained Abbe number (7)) and the partial dispersion ratio (0g, F), the relationship is obtained ( 0g, F) = Intercept b in the slope a of 0.0025 in _axVd+b. Here, the refractive index (nd), the Abbe number (vd), and the partial dispersion ratio (eg, F) are determined by measuring the glass obtained by setting the slow cooling rate to -25 ° C /hr. . Further, the penetration rates of the glass of the examples (No. 285), the reference examples (No. a to No. B), and the comparative examples (No. A to No. B) are based on the Sakamoto Optical Glass Industry Association. It is measured by the specification JOGIS02. Further, in the present invention, the presence or absence of the color of the glass is determined by measuring the transmittance of the glass. Specifically, a face to face parallel polishing product having a thickness of 10 〇 ± 〇.l mm is used to measure the light transmittance of 200 to 800 nm based on JIS Z8722, and the human 5 is obtained (the penetration rate is 5). The wavelength at %) and λ·7〇 (wavelength at a transmittance of 70%). In addition, the liquid phase temperature of the glass of the example (No.1~Νο.285), the reference example (Ν〇.Α~Νο_Β), and the comparative example (Νο_Α~Νο.Β) is based on the platinum of 5〇mi capacity. In the '30 cc glass-like glass sample into the platinum heap disaster, completely molten at 1350 ° C, cooling to 1300 ° C ~ 1160 ° C to 158137.doc • 29- 201219333, and The 12-hour surface and the junction in the glass were held, and the furnace crystal was taken out until any temperature set at 20 ° C was determined. After cooling, the temperature at which the glass was observed to be the lowest was directly observed. [Table 1] Example 1 2 3 4 5 6 7 B2〇3 10.750 11.198 11.130 11.139 11.650 11.400 11.300 La2〇3 43.180 44.979 44.706 44.742 41,850 44.500 44.500 Ta2〇5 13.370 13.627 13.842 13.854 15.300 13.500 10.500 Ti02 Nb205 1.470 1.531 1.522 1.523 0.500 0.500 0.500 W03 1.300 1.654 1.346 1.347 2.400 4.200 5.600 Si02 6.510 6.781 6.740 6.745 6.400 6.500 6.500 Zr02 5.300 5.521 1.864 1.785 6.000 6.000 6.000 Gd2〇3 9.610 10.010 9.950 9.958 15.400 9.850 11.550 Y2〇3 3.820 3.979 3.955 3.958 4.000 4.000 Yb2〇3 Li20 p2 〇5 Ge〇2 ZnO 4.680 0,708 4.845 4.849 ai2〇3 Bi203 Te02 Sn02 Sb2〇3 0.010 0.010 0.100 0.100 0.100 0.050 0.050 Total 100.00 100.00 100.00 100.00 99.60 100.50 100.50 Ti+Nb+W 2.770 3.185 2.868 2.870 2.900 4.700 6.100 B+Si 17.260 17.979 17.870 17.884 18.050 17,900 17.800 (Zr+Ta+Nb)/(B+Si) 1.167 1.150 0.964 0.960 1.208 1.117 0.955 La+Gd+Y+Yb 56.610 58.969 58.611 58.658 57.250 58.350 60.050 Ta/(Ln+Z r+Nb+W) 0.207 0.201 0.219 0.219 0.231 0.196 0.146 -30- 158137.doc 201219333

Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln+Zr+Li) 0.300 0.304 0.318 0.318 0.323 0.343 0.354 Nd 1.88409 1.88338 1.87321 1.87263 1.88240 1.88469 1.88463 vd 40.7 40.8 41.4 41.4 40.7 40.4 40.4 Partial dispersion ratio (eg,f) 0.56650 0.56773 0.56608 0.56689 0.56853 0.56823 0.57026 Intercept b (a=0.0025) 0.66825 0.66973 0.66958 0.67039 0.67028 0.66923 0.67126 λ7〇Γητη1 378 382 376 373.5 386.5 383.5 386.5 λ5[ηηι] 333 335 332.5 332 339 342 344.5 Liquidus temperature [°c] 1220 1260 1180 1180 1220 1220 1220 [Table 2] Example 8 9 10 11 12 13 14 15 B2O3 10.859 10.881 10.978 10.821 10.798 10.950 10.740 10.740 La2〇3 42.912 42.997 43.383 44.656 42.671 43.272 42.442 43.141 Ta2〇s 12.949 12.974 13.091 12.903 12.876 13.057 15.356 13.358 Ti02 Nb2〇5 3.036 1.488 1.501 1.480 1.477 1.497 1.469 1.469 W03 1.355 1.299 Si02 6.576 6.589 6.648 6.553 6.539 6.631 6.504 6.504 Zr02 5.354 5.365 5.413 5.335 5.324 6.124 5.295 5.295 Gd2〇3 9.708 9.727 9.814 9.674 11.756 9.789 9.601 9.601 ΥΛ 3.859 3.867 3.901 3.845 3.837 3.891 3.817 3.817 Yb203 Li20 ΡΛ Ge〇2 ZnO 4.728 4.737 4.779 4.711 4.701 4.767 4.676 4.ii ai2o, BiiO, Te02 Sn02 Sb2〇3 0.020 0.020 0.020 0.020 0.020 0.020 0.100 0.100 •31 · 158137.doc 201219333 Total 100.00 100.00 99.53 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 3.036 2.843 1.501 1.480 1.477 1.497 1.469 2.768 B+Si 17.436 17.470 17.627 17.375 17.338 17.582 17.244 17.244 (Zr+Ta+Nb )/(B+Si) 1.224 1.135 1.135 1.135 1,135 1.176 1.283 1.167 La+Gd+Y+Yb 56.479 56.591 57.098 58.176 58.265 56.952 55.860 56.559 Ta/(Ln+Zr+Nb+W) 0,200 0.200 0.205 0.199 0.198 0.202 0.245 0.207 Mg +Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln+Zr+Li) 0.282 0.304 0.282 0.274 0.273 0.279 0.282 0.300 nd 1.88522 1.88202 1.88244 1.88140 1.88Ϊ29 1. 88Π9 1.88383 1.88393 vd 40.6 40.8 40.8 41.4 41.4 41.3 40.9 40.7 Partial dispersion ratio (〇g,F) 0.56848 0.56779 0.56687 0.56546 0.56646 0.56628 0.56727 0.5676S Money distance b (a= 0.0025) 0.66998 0.66979 0.66887 0.66896 0.66996 0.66953 0.66952 0.66943 λ7〇“ηηι1 361 369.5 367.5 359 358.5 36Ϊ 368.5 378 hfnml 313.5 332 324.5 307.5 308.5 308.5 311.5 334 Liquidus temperature fc] [Table 3] Example 16 17 18 19 20 21 22 23 B2〇3 11.188 10.885 10.779 12.022 10.977 11.011 10.991 11.396 L3.2O3 44.939 43.012 42.593 40.173 43.379 43.511 43.433 43.409 Ta205 13.615 12.979 12.852 17.781 13.089 13.129 13.106 13.098 Ti02 Nb2Os 1.530 1.488 1.474 1.004 1.501 1.506 1.503 1.502 WOi 1.653 Si02 6.775 6.592 6.527 6.428 6.648 6.668 7.011 6.652 Zr02 5.516 5.366 5.314 6.026 5.412 5.429 5.419 5.416 Gd^O , 10.001 9.730 9.636 15.467 9.813 9.843 9.826 9.820 Y2〇i 3.976 5.188 3.830 1.000 3.901 3.913 3.906 3.904 Yb,0, 2.282 Li?0 0.177 p205 Ge〇2 158137.doc •32- 8 2012193 33

ZnO 0.708 4.739 4.692 5.259 4.794 4.785 4.782 AI2O3 Bi2〇3 Te02 Sn02 Sbj〇3 0.100 0.020 0.020 0.100 0.020 0.020 0.020 0.020 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 3.183 1.488 1.474 1.004 1.501 1.506 1.503 1.502 B+Si 17.963 17.476 17.306 18.449 17.625 17.679 18.002 18.048 (Zr+Ta+Nb)/(B 十Si) 1.150 1.135 1.135 1.345 1.135 1.135 1.113 1.109 La+Gd+Y+Yb 58.916 57.931 58.341 56.639 57.093 57.267 57.165 57.133 Ta/(Ln+Zr +Nb+W) 0.201 0.200 0.197 0.279 0.205 0.205 0.205 0.205 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.177 0.000 0.000 (B+Si+W) /(Ln+Zr+Li) 0.304 0.276 0.272 0.294 0.282 0.281 0.288 0.289 nd 1.88292 1.88005 1.88052 1.87965 1.87867 1,87748 1.8762 1.87559 vd 40.9 41.5 41.4 41.0 41.4 41.5 41.5 41.6 Partial dispersion ratio (eg,f) 0.56779 0.56618 0.56632 0.56650 0.56618 0.56616 0.56567 0.56573 Intercept b (a=0.0025) 0.67004 0.66993 0.66982 0.66900 0.66968 0.66991 0.66942 0.66973 λ70 "ηιη1 383 357 358.5 363 360.5 357.5 362.5 360 λ5[ηηι] 336 307.5 308 312 308.5 307 308.5 308.5 Liquidus temperature [°c] [Table 4] Example 24 25 26 27 28 29 30 31 B2O3 10.497 11.268 11.233 11.408 10.740 10.857 11.030 12.242 L32〇3 42.165 45.259 45.119 45.823 42.142 42.905 43.588 36.490 Ta205 13.056 14.014 13.670 13.883 13.358 14.514 13.152 15.226 Ti02 Nb205 1.435 1.541 1.536 1.469 1.485 1.508 1.456 W03 1.269 1.363 1.258 1.278 2.298 Si02 6.357 6.824 6.802 6.908 6.504 6.575 6.680 5.074 Zr02 5.175 5.555 5.538 5.624 5.295 5.353 5.438 5.250

158137.doc -33- 201219333

Gd2〇^ 15.375 10.073 10.042 10.198 9.601 9.706 9.861 15.741 ΥΛ 4.004 3.992 4.054 3.817 3.858 3.920 3.784 Yb203 Li20 P,0s Ge〇2 ZnO 4.570 0.711 0.722 4.676 4.727 4.802 4,636 Al2〇3 Bi203 Te02 Sn02 Sb2〇3 0.100 0.100 0.100 0.100 0.100 0.020 0.021 0.100 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 2.705 2.903 2.794 1.278 3.767 1.485 1.508 1.456 B+Si 16.854 18.091 18.035 18.316 17.244 17.433 17.710 17.316 (Zr+Ta+Nb)/(B+Si) 1.167 1.167 1.150 1.065 1.167 1.225 1.135 1.267 La+Gd+Y+Yb 57.540 59.336 59.152 60.075 55.560 56.469 57.368 56.015 Ta/(Ln+Zr+Nb+W) 0.200 0.207 0.203 0.207 0.207 0.229 0.205 0.243 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0,000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln+Zr+Li) 0.289 0.300 0.298 0.298 0.321 0.282 0.282 0.283 nd 1.88688 1.88248 1.88180 1.87526 1.88444 1.88184 1.87866 1.88038 v〇40.6 41.0 41.0 41 .9 40.3 41.1 41.4 41.1 Partial dispersion ratio (0g, F) 0.56783 0.56705 0.56724 0.56397 0.56882 0.56617 0.56598 0.56682 戠 distance b (a=0.0025) 0.66933 0.66955 0.66974 0.66872 0.66957 0.66892 0.66948 0.66957 λ7〇Γηι1 378 380 379.5 372 382 359 362.5 359.5 X5fnm ] 334 334.5 333 331.5 338.5 308.5 309 312 Liquidus temperature [°c] 1240 1240 1240 158137.doc 34 8 201219333 [Table 5] Example 32 33 34 35 36 37 38 39 B203 12.239 12.339 12.188 12.447 12.408 12.533 12.403 12.374 La2〇 3 36.447 36.778 44.939 41.165 44.119 44.339 44.275 45.624 T&2〇S 15.356 15.346 13.615 13.556 13,564 13.615 13.688 13.822 Ti〇2 Nb205 1.469 1.468 1.530 1.435 1.541 1.530 1.538 1.553 W03 1.653 1.569 1.863 1.883 1.883 1.678 Si02 5.005 5.114 5.775 5.857 5.824 5.800 5.806 5.863 Zr02 5.295 5.292 6.222 6.175 6.055 6.222 6.256 6.317 Gd?0, 15.596 13.774 10.002 17.375 10.073 10.002 10.055 6.114 Y2〇i 3.817 5.117 3.976 4.004 3.976 3.997 6.553 Yb203 Li20 P,〇s Ge〇2 ZnO 4.676 4.673 0.320 0.450 Al2〇3 Bi203 Te02 Sn02 Sb2〇3 0.100 0.100 0.100 0.100 0.100 0.100 0.100 0.101 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 1.469 1.468 3.183 3.005 3.403 3.413 3.421 3.231 B+Si 17.244 17.453 17.963 18.304 18.231 18333 18.209 18.237 (Zr+Ta+Nb)/(B+Si) 1.283 1.267 1.190 1.156 1.161 1.165 1.180 1.190 La+Gd+Y+Yb 55.860 55.669 58.917 58.540 58.196 58.317 58.327 58.291 Ta/(Ln+Zr+Nb+ W) 0.245 0.246 0.199 0.200 0.200 0.200 0.201 0.204 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln +Zr+Li) 0.282 0.286 0.301 0.307 0.313 0.313 0.311 0.308 nd 1.88150 1.87981 1.88478 1.88117 1.88176 1.88176 1.88256 -35- 158137.doc 201219333

Vd 41.0 41.1 40.8 40.9 40.8 40.8 40.9 Partial dispersion ratio (eg,f) 0.56657 0.56662 0.56662 0.56738 0.56759 0.56667 0.56786 Intercept b(a= 0.0025) 0.66907 0.66937 0.66862 0.66963 0.66959 0.66867 0.67011 λ70_ 359 363 380 379.5 383.5 384 380 380.5 λ$[ η ηη] 312 312 336 335.5 337 337.5 336 336.5 Liquidus temperature [°c] 1260 1260 1260 1240 1240 1240 1240 [Table 6] Example 40 41 42 43 44 46 47 B2〇3 12.115 12.313 12.653 12.392 12.377 11.527 11.957 La2〇3 39.337 44.819 43.619 40.237 45.638 42.165 42.165 Ta2〇5 13.533 13.615 13.615 13.843 13.827 13.856 13.856 Ti02 Nb205 1.521 1.530 1.530 1.556 1.435 1.435 W03 1.643 1.773 1.883 1.680 1.678 1.869 1.869 Si02 5.741 5.800 5.800 5.872 5.865 6.357 6.357 Zr02 6.185 5.516 6.822 6.327 6.319 5.175 6.175 Gd ]〇3 15.874 10.001 10.002 10.169 10.157 15.375 15.375 γ2〇3 3.952 3.976 3.976 7.823 4.037 Yb203 Li20 p2〇5 Ge〇2 ZnO 0.558 2.140 0.710 AI2O3 Bi203 Te02 Sn02 Sb2〇3 0.099 0.100 0.100 0.102 0.101 0.100 0.100 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 3.163 3.303 3.413 3.236 1.678 3.305 3.305 B+Si 17.855 18.113 18.453 18.264 18.242 17.884 18.314 (Zr+Ta+Nb)/(B +Si) 1.190 1.141 1.190 1.190 1.104 1.144 1.172 158137.doc -36- 8 201219333

La+Gd+Y+Yb 59.163 58.796 57.597 58.229 59.832 57.540 57.540 Ta/(Ln+Zr+Nb+W) 0.198 0.201 0.201 0.204 0.204 0.210 0.207 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+ K+Cs 0,000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln+Zr+Li) 0.298 0.309 0.316 0.309 0.301 0.315 0.317 nd 1.88380 1.88210 1.88228 1.88099 1.87856 1.88204 1.88164 vd 40.9 40.9 40.8 40.9 41.7 40.6 40.7 Partial dispersion Ratio (eg,f) 0.56779 0.56818 0.56813 0.56784 0.56553 0.56636 0.56714 Cutting distance b (a=0.0025) 0.67004 0.67043 0.67013 0.67009 0.66978 0.66786 0.66889 λ7〇_ 383.5 381.5 380.5 377 380,5 380.5 λ5[ηπι] 336.5 337.5 336.5 335 337 337 Phase temperature [°c] 1240 1240 [Table 7] Example 48 49 50 51 52 53 54 55 b20, 11.300 12.447 12.447 12.188 12.188 12.300 12.300 12.028 La, 5〇i 43.180 41.165 40.665 41.939 38.939 43.180 43.181 42.922 Ding 〇5 13.870 13.556 13.556 13.615 13.615 13.870 13.870 13.787 Ti02 0.127 Nb205 1.470 1.435 1.435 1.530 1.530 1.470 1.470 1.461 WO, 1.800 1.889 2.069 1.653 1.653 1.800 1.800 2.714 Si02 6.510 5.857 5.857 5.775 5.775 6.510 6.510 6.471 ZrO, 5.300 6,175 6.175 6.222 6.222 7.300 7.300 6.262 Gd2〇3 9.610 17.375 17.375 13.002 16.002 9.610 9.610 10.547 ΥΛ 3.820 3.976 3.976 3.820 3.820 3.797 Yb?0' Li20 ΡΛ Ge02 ZnO 3.130 0.320 0.130 A1203 Bi20, Te02 -37- 158137.doc 201219333

Sn02 Sb2〇3 0.010 0.100 0.100 0.100 0.100 0.010 0.010 0.010 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 3.270 3.325 3.505 3.183 3.183 3.270 3.397 4.175 B+Si 17.810 18.304 18.304 17.963 17.963 18.810 18.811 18.499 (Zr+Ta+ Nb)/(B+Si) 1.159 1.156 1.156 1.190 1.190 1.204 1.204 1.163 La+Gd+Y+Yb 56.610 58.540 58.040 58.917 58.917 56.610 56.612 57.266 Ta/(Ln+Zr+Nb+W) 0.213 0.199 0.200 0.199 0.199 0.206 0.206 0.204 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln+ZrfLi) 0.317 0.312 0.317 0.301 0.301 0.322 0.322 0.334 nd 1.88170 1.88197 1.88176 1.88412 1.88330 1.87937 1.88062 1.88110 vd 40.7 40.8 40.7 40.8 40.9 40.8 40.7 40.6 Partial dispersion ratio (eg, F) 0.56760 0.56852 0.56767 0.56721 0.56733 0.56772 0.56813 0.56860 Intercept b (a=0.0025) 0.66935 0.67052 0.66942 0.66921 0.66958 0.66972 0.66988 0.67010 λ7〇Γηηι1 373 381.5 382.5 381.5 379 371.5 371.5 λ5ΓηΓη] 33 4 337.5 338.5 336.5 336 334.5 335 Liquid phase temperature [°c] [Table 8] Example 56 57 58 59 60 61 62 63 B2〇3 11.300 12.447 12.447 12.447 12.313 12.447 12.247 12.019 La2〇3 43.180 41.165 40.665 40.905 44.620 40.165 40.965 42.192 Ta2〇5 13.870 13.556 13.556 13.556 13.615 13.556 13.756 13.553 Ti02 0.177 Nb205 1.470 1.435 1.435 1.435 1.530 1.435 1.435 1.436 W03 1.800 1.889 2.069 1.769 1.773 1.569 1.889 1.759 Si02 6.510 5.857 5.857 5.917 6.000 6.057 6.057 6.361 Zr02 5.300 6.175 6.175 6.495 5.516 7.175 6.175 7.133 Gd2 〇3 9.610 17.375 17.375 17.375 10.002 17.375 17.375 15.410 Y2O3 6.820 3.976 Yb203 Li20 -38- 158137.doc 201219333 ΡΛ Ge〇2 ZnO 0.130 0.320 0.379 0.120 0.127 ai2o3 Bi203 Te02 Sn02 Sb203 0.010 0.100 0.100 0.100 0.100 0.100 0.100 0.010 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 3.270 3.325 3.505 3.205 3.479 3.005 3.325 3.195 B+Si 17.810 18.304 18.304 18.364 18.31 3 18.504 18.304 18.380 (Zr+Ta+Nb)/(B+Si) 1.159 1.156 1.156 1.170 1.128 1.198 1.167 1.204 La+Gd+Y+Yb 59.610 58.540 58.040 58.280 58.598 57.540 58.340 57.603 Ta/(Ln+Zr+Nb+W 0.203 0.199 0.200 0.199 0.202 0.200 0.203 0.200 Mg+Ca+Sr+Ba 0,000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln+ Zr+Li) 0.302 0.312 0.317 0.311 0.313 0.310 0.313 0.311 nd 1.88319 1.88163 1.88156 1.88157 vd 41.0 40.8 40.7 40.8 Partial dispersion ratio (eg,f) 0.56772 0.56562 Intercept b (a=0.0025) 0.67022 0.66737 λ70_ 371.5 Xs[nm] 334 Phase temperature fc] 1240 [Table 9] 1 f Example 64 65 66 67 68 69 70 71 B2〇3 12.447 11.850 11.491 11.523 12.470 12.528 12.447 11.850 La2〇3 40.545 45.829 43.713 45.534 40.838 41.029 41.165 45.829 Ta2〇s 13.556 8.912 9.371 13.883 13.875 Ti02 0.219 Nb205 1.435 4.032 3.403 6.545 1.435 1.442 1.435 4.032 wo3 1.889 4.305 1.883 1.448 10.889 8.912 -39- 158137.doc 201219333

Si02 5.977 6.443 6.453 6.978 5.858 5.885 5.857 6.443 Zr02 6.675 6.387 6.397 5.681 6.175 5.867 6.175 6.387 Gd2〇3 17.375 9.631 10.150 10.301 17.357 17.438 21.931 9.631 Y2〇3 3.273 3.822 4.095 3.273 Yb203 Li20 P,〇, Ge〇2 ZnO 3.443 5.000 5.016 0.169 3.443 A1203 Bi2〇3 Te02 Sn02 Sb2〇3 0.100 0.199 0.200 0.021 0.100 0.100 0.100 0.199 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 3.325 4.032 3.403 10,850 3.319 3.109 12.325 12.944 B+Si 18.424 18.293 17.944 18.501 18.328 18.414 18.304 18.293 (Zr+Ta+Nb)/(B+Si) 】.176 1.057 1.068 0.661 1.173 1.150 0.416 0.570 La+Gd+Y+Yb 57.920 58.733 57.685 59.930 58.195 58.466 63.096 58.733 Ta/(Ln+Zr+Nb+W) 0.200 0.129 0.139 0.000 0.205 0.206 0.000 0.000 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln+Zr +Li) 0.314 0.281 0.280 0.348 0.314 0.309 0.421 0.41 8 Πη 1.88150 1.88122 1.87883 1.88387 vd 40.8 40.8 39.9 39.1 Partial dispersion ratio (eg,f) 0.56753 0.56753 0.57266 0.57357 Intercept b(a=0.0025) 0.66953 0.66953 0.67241 0.67132 λ7〇ίηπι1 357 383.5 383 400 408 X5fnm] 308 337.5 337 353 355.5 Liquidus temperature [°c] 1220 1200 1200 1190 158137.doc 40 8 201219333 [Table 〇] Example 72 73 74 75 76 77 78 79 ^2〇.1 11.500 11.500 13.447 12.447 12.447 12.448 12.528 12.528 La,2〇3 42.500 42.500 41.165 40.165 42.165 41.029 40.829 40.879 Ta^Os 13.556 13.556 13.556 13.875 13.875 13.875 Ti02 1.900 0.219 0.219 0.169 Nb205 8.600 3.200 1.435 1.435 1.435 1.242 1.142 1.242 W03 2.400 2.400 1.889 1.889 1.889 1.617 1.748 1.748 Si02 6.900 6.900 4.857 5.857 5.857 5.885 5.785 5.785 Zr02 6.100 6.100 6.175 6.175 6.175 6.067 6.167 6.067 Gd2〇3 10.400 13.900 17.375 18.375 16.375 17.518 17.438 17.438 ΥΛ 3.500 3.500 Yb203 Li20 P2〇s Ge〇2 ZnO 8.100 8.100 0.169 0.169 AI2〇3 Bi20, Te02 Sn02 Sb2〇3 0.100 0.100 0.100 0.100 0.100 0.100 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 .Ti+Nb+W 11.000 7.500 3.325 3.325 3.325 3.078 3.109 3.159 B+Si 18.400 18.400 18.304 18.304 18.304 18.334 18.314 18.314 (Zr+Ta+Nb)/(B+Si) 0.799 0.505 1.156 1.156 1.156 1.155 1.157 1.157 La+Gd+Y+Yb 56.400 59.900 58.540 58.540 58.540 58.546 58.266 58.317 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.199 0.199 0.199 0.206 0.206 0.206 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0,000 0.000 (B+Si+W)/(Ln+Zr+Li) 0.333 0.315 0.312 0.312 0.312 0.309 0.311 0.312 1.88373 1.87996 1.88162 1.88130 1.88189 1.88180 1.88202 1.88185 -41 - 158137.doc 201219333

Vd 39.0 39.7 40.9 40.8 40.8 40.8 40.7 40.8 Partial dispersion ratio (0g, F) 0.57244 0.57143 0.56653 0.56719 0.56786 0.56727 0.56813 0.56747 Cutting distance b (a = 0.0025) 0.66994 0.67068 0.66878 0.66919 0.66986 0.66927 0.66988 0.66947 λ7〇[ηηι1 393 383.5 383 383.5 386 385.5 384 λ5Γηπι] 337.5 _ 337.5 338 337.5 338 338.5 338 Liquidus temperature [°c] 1190 1220 1220 1220 [Table ii] Example Reference Example 80 81 82 83 84 85 AB b203 12.510 12.493 13.375 12.693 11.500 13.600 10.908 10.880 La2〇i 48.381 48.829 43.800 45.829 42.500 42.500 43.952 43.532 Ta2〇5 3.035 Ti02 1.845 Nb205 3.233 4.032 7.648 4.032 8.600 8.600 6.547 5.580 WO, 1.973 8.712 2.468 8.912 2.400 2.400 Si02 6.802 6.443 6.283 6.443 6.900 6.900 7.345 7.217 Zr02 6.743 6.387 7.704 6.387 6.100 6.100 7.335 6.928 Gd2 〇3 10.167 9.631 18.616 12.231 10.400 16.400 13.992 13.146 3.456 3.273 3.273 3.500 3.500 3.992 3.953 Yb203 Li20 P2〇5 Ge〇2 ZnO 4.679 8.100 5.729 5.530 AI2O3 Bi203 Te02 Sn02 Sb203 0.210 0.199 0.107 0.199 0.200 0.200 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 7.051 12.744 10.115 12.944 11.000 11.000 6.547 5.580 B+Si 19.312 18.936 19.658 19.136 18.400 20.500 18.253 18.097 (Zr+Ta+Nb) /(B+Si) 0.517 0.550 0.781 0.544 0.799 0.717 0.761 0.859 158137.doc -42- 8 201219333

La+Gd+Y+Yb 62.004 61.733 62.416 61.333 56.400 62.400 61.936 60.631 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.041 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li +Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B 十+W)/(Ln+Zr+Li) 0.310 0.406 0.316 0.414 0.333 0.334 0.264 0.268 nrf 1.87727 1.88185 1.88256 1.87951 1.88318 1.87466 vd 40.2 39.5 39.9 39.5 39.4 40.1 • Partial dispersion ratio (0g, f) 0.57110 0.57252 0.57033 0.57329 0.58278 0.57038 Intercept b (a=0.0025) 0.67160 0.67127 0.67008 0.67204 0.68128 0.67063 Devitrification and devitrification λ70『ηηι1 383 λ5_ 337 Liquidus temperature [°c] [Table 12 ] Ratio - & Example AB B2O3 12.920 15.436 L&2〇3 30.932 27.442 Ta2〇5 21.807 22.297 Ti02 Nb205 W03 2.404 1.286 Si02 2.861 2.573 Zr02 3.272 8.576 Gd2〇3 10.509 9.433 Y2〇3 Yb2〇3 Li20 0.158 P2O5 Ge02 ZnO 15.031 12.864 ai2〇3 Bi203 Te02 • 43· 158137.doc 201219333

Sn02 Sb2〇3 0.107 0.093 Total 100.00 100.00 Ti+Nb+W 2.404 1.286 B+Si 15.781 18.009 (Zr+Ta+Nb)/(B+Si)· 1.589 1.714 La+Gd+Y+Yb 41.441 36.876 Ta/(Ln +Zr+Nb+W) 0.463 0.477 Mg+Ca+Sr+Ba 0.000 0.000 Li+Na+K+Cs 0.158 0.000 (B+Si+W)/(Ln+Zr+Li) 0.405 0.425 nd Devitrification and devitrification Vd Partial dispersion ratio (eg, f) Intercept b (a = 0.0025) λ7 〇 [ηηι1 X5 [nm] liquidus temperature [°c] [Table 13] Example 86 87 88 89 90 91 92 93 B2〇3 】 .62 12.62 J2.53 】3·37 13.37 13.37 13.37 12.60 Lfl2〇3 44.94 44.94 40.88 33.80 40.80 37.80 30.80 44.94 Ta205 Ti02 0.17 Nb205 3.95 4.33 1.24 7.65 7.65 7.65 7.65 3.95 W03 8.74 8.74 15.62 2.47 2.47 2.47 2.47 9.17 Si02 6.32 6.32 5.79 6.28 6.28 6.28 6.28 6.28 Zr02 6.26 6.26 6.07 7.70 7.70 7.70 7.70 6.26 Gd,0, 14.60 16.60 17.44 28.62 21.62 24.62 31.62 16.56 ΥΛ Yb,0, Li20 158137.doc -44- 8 201219333 ΡΛ Ge〇2 ZnO 3.38 0.17 AI2O3 Bi? 0, Te02 Sn02 Sb2〇; 0.20 0.20 0.10 0.11 0.11 0.11 0.11 0.20 Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 Ti+Nb+W 13.07 17.03 10.12 10.12 10.12 10.12 13.12 13.07 B+Si 17.94 18.94 18.31 19.66 19.66 19.66 19.66 18.92 (Zr+Ta+Nb)/(B+ Si) 0.570 0.559 0.399 0.781 0.781 0.781 0.781 0.540 La+Gd+Y+Yb 59.54 61.54 58.32 62.42 62.42 62.42 62.42 61.50 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Mg+Ca+Sr+ Ba 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Li+Na+K+Cs 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 (B+Si+W)/(Ln+Zr+Li) 0.405 0.408 0.527 0.316 0.316 0.316 0.316 0.415 nrf 1.88658 1.88204 1.88165 1.87885 1.88198 1.88094 1.87863 1.88131 vd 39,0 39.4 38.4 40.1 -39·9 40.0 39.4 Partial dispersion ratio (eg,f) 0.57376 0.57296 0.57603 0.57071 0.57130 0.57033 0.57302 Intercept b(a=0.0025) 0.67126 0.67146 0.67203 0.67096 0.67105 0.67033 0.67152 λ70 『ηηι】 409.5 409.5 409.5 388.5 387.5 387.5 386.5 λ5Γηπι 1 356 356.5 358 342 341.5 341.5 342.5 Liquidus temperature [°c] 1240 1240 1260 1260 1280 [Table 14] Example 94 95 96 9Ί 98 99 100 101 Β2〇3 11.62 12.60 13.07 12.10 12.10 12.10 13.32 13.65 L&2〇3 44.93 34.94 37.80 42.50 39.50 36.50 41.62 44.69 Τ&2〇5 TiO, Nb205 3.95 3.95 7.65 5.10 5.10 5.10 8.92 7.80 W03 8.74 9.17 3.27 5.40 5.40 5.40 1.85 2.52 -45- 158137.doc 201219333

Si02 6.32 6.32 6.28 6.90 6.90 6.90 6.76 6.41 Zr02 6.26 6.26 6.10 6.10 6.10 6.10 6.17 5.82 Gd2〇3 14.61 26.56 25.72 21.90 24.90 27.90 21.36 19.10 Υ,Οι Yb203 Li20 P2〇5 Ge〇2 ZnO 3.38 Al2〇3 Bi203 Te02 Sn02 Sb2〇 3 0.20 0.20 0.11 Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 Ti+Nb+W 12.69 13.12 10.92 10.50 10.50 10.50 10.77 10.32 B+Si 17.94 18,92 19.36 19.00 19.00 19.00 20.08 20.06 (Zr+Ta+Nb)/(B+ Si) 0.570 0.540 0.710 0.589 0.589 0.589 0.752 0.679 La+Gd+Y+Yb 59.54 61.50 63.52 64.40 64.40 64.40 62.98 63.80 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Mg+Ca+Sr+ Ba 0.00 0,00 0.00 0.00 0.00 0.00 0.00 0.00 Li+Na+K+Cs 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 (B+Si+W)/(Ln+Zr+Li) 0.405 0.415 0.325 0.346 0.346 0.346 0.317 0.324 nd 1.88656 1.87833 1.88085 1.87990 1.87921 1.87828 1.87902 1.87685 vd 39.0 39.5 40.1 40.3 40.3 40.3 39.9 40.3 Partial dispersion ratio (0g, F 0.57432 0.57323 0.56759 0.57136 0.57169 0.57156 0.57007 0.56979 戠 distance b (a=0.0025) 0.67182 0.67198 0.66784 0.67211 0.67244 0.67231 0.66982 0.67054 λ7〇[ηιη1 390.5 390 394.5 387.5 385.5 391 h『nml 344 343 344 343 335.5 337 Liquidus temperature [°c 1290 1280 1290 158137.doc -46- 8 201219333 [Table 15] Example 102 103 104 105 106 107 108 109 B2〇3 13.07 13.23 13.26 13.39 12.10 12.10 12.10 12.10 La2〇3 37.10 36.36 38.32 34.88 33.50 30.50 46.00 36.50 Ta2〇 5 Ti02 Nb205 7.65 7.74 7.75 7.83 5.10 5.10 5.10 6.10 W03 3.77 3.31 3.31 3.35 5.40 5.40 5.40 4.40 Si02 6.48 6.36 6.37 6.43 6.90 6.90 6.90 6.90 Zr02 6.10 6.89 6.90 7.69 6.10 6.10 6.10 6.10 Gd2〇3 25.72 26.02 23.97 26.33 30.90 33.90 18.40 27.90 Y2O3 Yb203 Li20 P?〇s Ge02 ZnO AI2O3 Bi203 Te02 Sn〇2 Sb2〇3 0.11 0.11 0.11 0.11 Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 Ti+Nb+W 11.42 11.04 11. 07 11.17 10.50 10.50 10.50 10.50 B+Si 19.56 19.58 19.63 19.82 19.00 19.00 19.00 19.00 (Zr+Ta+Nb)/(B+Si) 0.703 0.747 0.747 0.783 0.589 0.589 0.589 0.642 La+Gd+Y+Yb 62.82 62.37 62.29 61.21 64.40 64.40 64.40 64.40 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0,000 0.000 0.000 Mg+Ca+Sr+Ba 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Li+Na+K+Cs 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 (B+Si+W)/(Ln+Zr+Li) 0.338 0.330 0.332 0.336 0.346 0.346 0.346 0.332 nd 1.87919 1.88027 1.88068 1.87968 1.87713 1.87633 1.88085 1.88009

158137.doc • 47- 201219333

Vd 39.8 39.7 39.7 39.6 40.3 40.3 40.1 40.1 Partial dispersion ratio (eg, f) 0.57311 0.57104 0.57169 0.57226 0.56979 0.57064 0.57039 0.57065 Intercept b (a = 0.0025) 0.67261 0.67029 0.67094 0.67126 0.67054 0.67139 0.67064 0.67090 λ7〇Γηηι1 389.5 390.5 391.5 390 398.5 389 393.5 389.5 Xsfnm] 345 344 344 344.5 344 344 342.5 342 Liquid phase temperature [°c] 1280 1280 1280 1270 1270 1290 1270 [Table 16] Example 110 111 112 113 114 115 116 117 B2〇3 12.09 12.10 13.57 13.07 12.56 12.54 13.07 12.10 Lfl2〇3 36.46 36.50 37.80 37.80 36.39 36.32 33.80 27.50 Ta2〇s Ti〇2 0.20 Nb205 5.85 6.10 7.65 7.45 7.35 8.84 7.65 5.10 W03 4.74 5.40 3.27 3.27 3.41 2.09 3.27 5.40 Si02 6.89 6.90 5.78 6.28 6.38 6.37 6.28 6.90 Zr02 6.09 5.10 6.10 6.10 6.08 6.07 6.10 6.10 Gdi〇3 27.87 27.90 25.72 25.72 27.82 27.77 29.72 36.90 ΥΛ Yb,〇, Li20 p,0; Ge〇2 ZnO A1,0, Bi203 Te02 Sn02 Sb2〇3 0.11 0.11 0.11 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100,0 Ti+Nb+W 10.59 11.50 10.92 Ϊ0.92 10.76 10.93 10.92 10.50 B+Si 18.98 19.00 19.36 19.36 18.95 18.91 19.36 19.00 (Zr+Ta+Nb)/(B+Si) 0.629 0.589 0.710 0.700 0.709 0.789 0.710 0.589 -48 - 158137.doc 201219333

La+Gd+Y+Yb 64.34 64.40 63.52 63.52 64.21 64.09 63.52 64.40 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Mg+Ca+Sr+Ba 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Li +Na+K+Cs 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 (B+Si+W)/(Ln+Zr+Li) 0.337 0.351 0.325 0.325 0.318 0.299 0.325 0.346 nd 1.87995 1.87810 1.88107 1.88204 1.88275 1.88594 1.87970 1.87503 Vd 40.1 40.0 39.9 39.7 40.0 39.6 39.9 40.3 Partial dispersion ratio (eg, f) 0.57130 0.57221 0.57240 0.57246 0.57046 0.57079 0.57162 0.57031 Cutting distance b (a = 0.0025) 0.67155 0.67221 0.67215 0.67171 0.67046 0.66979 0.67137 0.67106 λ7〇ίηπι1 389 390 390 390.5 387 389.5 389 384 hfnm] 342.5 343 344 344.5 340 337.5 344 343.5 Liquidus temperature [°c] 1270 1260 1290 1290 [Table 17] Example 118 119 120 121 122 123 124 125 B2〇3 12.10 12.10 11.42 13.24 12.10 12.10 12.10 12.10 L&2〇3 31.50 30.50 31.60 35.26 33.50 40.00 33.50 43.00 Ta2〇5 Ti02 6.00 3.00 3.00 Nb205 5.10 5.10 4.81 5.37 5.10 5.10 5.10 5.10 W03 5.40 11.4 0 10.75 5.68 5.40 5.40 5.40 5.40 Si02 6.50 6.90 6.51 6.76 6.90 6.90 6.90 6.90 Zr02 6.10 6.10 5.75 6.42 6.10 6.10 6.10 6.10 Gd2〇3 30.90 27.90 29.15 27.26 25.90 18.40 27.90 18.40 YA Yb203 Li20 p205 GeO?. ZnO 2.40 5.00 Al2〇3 Bi ,0, Te02 -49- 158137.doc 201219333

Sn02 Sb2〇3 Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 Ti+Nb+W 10.50 16.50 15.57 11.05 10.50 16.50 13.50 13.50 B+Si 18.60 19.00 17.92 20.00 19.00 19-00 19.00 19.00 (Zr+Ta+Nb)/(B+ Si) 0.602 0.589 0.589 0.589 0.589 0.589 0.589 0.589 La+Gd+Y+Yb 62.40 58A0 60.75 62.53 59.40 58.40 61.40 61.40 Ta/(Ln+Zr+Nb 十W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Mg+Ca+Sr+ Ba 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Li+Na+K+Cs 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 (B+Si+W)/(Ln+Zr+Li) 0.350 0.471 0.431 0.373 0.373 0.378 0.361 0.361 nd 1.87810 1.87914 1.88804 1.87046 1.87267 1.91355 1.89452 1.89683 vd 40.1 38.3 38.3 40.4 40.1 34.5 37.2 37.2 Partial dispersion ratio (eg,f) 0.57117 0.57691 0.57550 0.57024 0.57189 0.58708 0.57838 0.57866 戠 distance b (a=0.0025) 0.67142 0.67266 0.67125 0.67124 0.67214 0.67333 0.67138 0.67166 λ7〇ίηπι ] 386.5 383.5 386 384 392 408 391.5 391 hfnml 343.5 349.5 349.5 343 '343 358 351.5 350.5 Liquidus temperature [°c] 1250 1250 1250 1220 [ 18] Example 126 127 128 129 130 131 132 133 B2O3 12.45 12.10 12.54 12.44 14.10 12.10 12.10 12.10 La, 2〇3 43.49 46.00 34.73 31.67 30.50 31.50 . 29.50 31.50 Ta2〇5 Ti02 0.94 6.00 1.93 Nb205 5.25 5.10 5.29 7.67 9.10 5.10 5.10 5.10 W03 5.56 5.40 6.00 5.40 5.40 5.40 5.40 Si02 7.10 6.90 7.15 6.67 6.90 6.50 6.10 6.10 Zr〇2 6.28 6.10 6.32 6.78 6.10 6.60 6.10 6.10 Gd: 〇3 18.93 12.40 32.03 28.78 27.90 30.90 30.90 28.90 Y2〇3 Yb70, Li20 158137.doc -50- 8 201219333 ΡΛ Ge02 ZnO 1.90 4.80 4.80 AI2O3 Bi203 Te02 Sn02 Sb20, total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 Ti+Nb+W 11.75 16.50 7.22 13.67 14.50 10.50 10.50 10.50 B+Si 19.55 19.00 19.70 19.11 21.00 18.60 18.20 18.20 (Zr+Ta+Nb)/(B+Si) 0.589 0.589 0.589 0.756 0.724 0.629 0.615 0.615 La+Gd+Y+Yb 62.43 58.40 66.76 60.44 58.40 62.40 60.40 60.40 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Mg +Ca+Sr+Ba 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Li+Na+K+Cs 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.000,00 (B+Si+W)/(Ln+Zr+Li) 0.365 0.378 0.270 0.374 0.409 0.348 0.355 0.355 nd 1.88214 1.91493 1.87932 1.88391 1.86963 1.87883 1.87756 1.87780 vd 39.2 34.5 40.3 38.8 38.9 40.1 39.9 39.9 Partial dispersion ratio (eg, F) 0.57308 0.58553 0.57032 0.57412 0.57335 0.57110 0.57130 0.57117 Intercept b (a=0.0025) 0.67108 0.67178 0.67107 0.67112 0.67060 0.67135 0.67105 0.67092 λ70_ 387.5 402 414.5 388 379.5 397.5 402.5 391 X5fnm] 345.5 357 339.5 345 344 344 343.5 343 Liquidus temperature [°c] [Table 19] Example 134 135 136 137 138 139 140 141 B2〇3 12.27 12.73 12.98 13.18 13.21 12.10 12.10 13.28 L&2〇3 31.95 33.14 43.36 32.12 34.07 33.50 33.50 35.37 T&2〇5 Ti02 0.98 1.47 5.10 2.58 Nb205 5.17 5.37 5.47 5.18 5.19 5.10 WO, 5.48 2.83 1.52 5.48 5.49 8.40 5.40 2.92

158137.doc -51 - 201219333

SiO, 6.59 6.47 6.60 6.50 6.52 6.90 6.90 6.79 Zr02 6.92 6.42 6.55 6.19 6.20 6.10 6.10 6.44 Gd2〇3 29.19 28.04 19.74 31.36 29.33 27.90 30.90 32.63 ΥΛ Yb203 Li20 P20, Ge02 ZnO 2.43 4.03 2.30 A1203 Bi203 Te02 Sn02 Sb2〇3 Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 Ti+Nb+W 10.65 9.17 8.47 J0.66 10.68 13.50 10.50 5.50 B+Si 18.86 19.20 19.59 19.68 19.72 19.00 19.00 20.06 (Zr+Ta+Nb)/(B+Si) 0.641 0.614 0.614 0.577 0.577 0.589 0.321 0.321 La+Gd+Y+Yb 61.13 61.18 63.10 63.47 63.39 61.40 64.40 68.00 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Mg+Ca+Sr+Ba 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Li+Na+K+Cs 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 (B+Si+W)/(Ln+Zr+Li) 0.358 0.326 0.303 0.361 0.362 0.406 0.346 0.309 nd 1.87745 1.87636 1.88014 1.87133 1.87148 1.87916 1.89161 1.86711 vd 40.0 39.9 39.9 40.5 40.5 39.2 37.5 41.4 Partial dispersion ratio (eg, f) 0.57104 0.5709 7 0.57136 0.57063 0.57083 0.57411 0.57895 0.56856 Cutting distance b (a = 0.0025) 0.67104 0.67072 0.67111 0.67188 0.67208 0.67211 0.67270 0.67206 λ70『ηιη1 398 388.5 390 392.5 401.5 385.5 392.5 395.5 X5fnml 344 342 340 343.5 343.5 347 353.5 345 Liquid phase temperature [°c] 1250 1250 1250 1250 1270 158137.doc 52 8 201219333 [Table 20] Example 142 143 144 145 146 147 148 149 B2〇3 15.02 12.98 14.98 13.98 14.21 13.21 13.21 12.10 La2〇3 49.30 43.36 43.36 43.36 34.07 34.07 34.07 46.00 Ta205 Ti02 6.69 1.47 4.47 3.47 2.00 2.00 5,00 5.00 Nb205 8.21 5.47 5.47 8.47 8.19 5.19 5.19 5.10 W03 4.52 1.52 2.49 3.49 5.49 5.40 Si02 6.88 6.60 6.60 6.60 6.52 6.52 6.52 6.90 Zr02 6.03 1.55 1.55 6.55 1.20 1.20 1.20 1.10 Gd2〇3 5.83 19.74 19.74 13.74 29.33 29.33 29.33 18.40 ΥΛ 0.58 Yb203 Li20 P2〇5 Ge〇2 ZnO 1.46 4.30 3.82 2.30 2.00 5.00 ai2o3 Bi203 Te02 Sn02 Sb20, total 100.0 100.0 100,0 100.0 100.0 100.0 100.0 100.0 Ti+Nb+W 14.90 11.47 9.95 13.47 12.68 10.68 15.68 15.50 B+Si 21.90 19.59 21.59 20.59 20.72 19.72 19.72 19.00 (Zr+Ta+Nb)/(B+Si) 0.650 0.358 0.325 0.729 0.453 0.324 0.324 0.326 La+ Gd+Y+Yb 55.71 63.10 63.10 57.10 63.39 63.39 63.39 64.40 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 M^+Ca+Sr+Ba 0.00 0:00 0.00 0.00 0.00 0.00 0.00 0.00 Li+Na+K+Cs 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 (B+Si+W)/(Ln+Zr+Li) 0.355 0.373 0.334 0.347 0.359 0.359 0.390 0.373 nd 1.89972 1.87116 1.87052 1.89260 1.86862 1.86704 1.89082 1.90021 -53- 158137.doc 201219333

Vd 34.8 39.6 38.6 36.7 39.0 39.7 36,1 36.0 Partial dispersion ratio (eg,F) 0.57357 0.57617 0.57970 0.57432 0.57365 0.58232 0.58217 Intercept b (a=0.0025) 0.67257 0.67267 0.67145 0.67182 0.67290 0.67257 0.67217 λτοίηπιΐ 401.5 384.5 388 390 382,5 390 400 401 λ5Γηιτι] 354.5 344 347 349 345.5 344.5 355.5 354.5 Liquidus temperature [°c] [Table 21] Example 150 151 152 153 154 155 156 157 B2〇3 12.10 13.10 13.21 13.98 14.03 14.52 12.10 12.10 L3203 36.00 45.00 44.07 43.36 42.66 44.14 36.50 39.50 Ta2〇5 Ti02 5.00 5.00 5.00 3.47 1.45 2.99 Nb205 5.10 5.10 5.19 5.47 10.18 5.57 5.10 5.10 W03 5.40 5.40 5.49 1.52 1.50 1.55 8.40 8.40 Si02 6.90 6.90 6.52 6.60 6.50 6.72 6.90 6.90 Zr02 UO 1.10 1.20 1.55 2.00 2.07 6.10 6.10 Gd203 28.40 18.40 19.33 19.74 19.43 20.10 24.90 21.90 Y2〇3 Yb20, Li20 ΡΛ Ge〇2 ZnO 4.30 2.26 2.34 AI2O3 Bi203 Te02 Sn02 Sb203 Total 100.0 100.0 100.0 100.0 100. 0 100.0 100.0 100.0 Ti+Nb+W 15.50 15.50 15.68 10.47 13.12 10.11 13.50 13.50 B+Si 19.00 20.00 19.72 20.59 20.53 21.24 19.00 19.00 (Zr+Ta+Nb)/(B+Si) 0.326 0.310 0.324 0.341 0.593 0.360 0.5S9 0.589 • 54· 158137.doc 201219333

La+Gd+Y+Yb 64.40 63.40 63.39 63.10 62.09 64.24 61.40 61.40 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Mg+Ca+Sr+Ba 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Li +Na+K+Cs 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 (B+Si+W)/(Ln+Zr+Li) 0.373 0.394 0.390 0.342 0.344 0.344 0.406 0.406 nd 1.89682 1.89170 1.89415 1.87268 1.87727 1.86832 1.87970 1.88069 vd 36.0 36.3 36.1 38.8 38.5 39.4 39.3 39.2 Partial dispersion ratio (0g, F) 0.58280 0.58137 0.58165 0.57511 0.57287 0.57376 0.57340 0.57283 Intercept b(a=0.0025) 0.67280 0.67212 0.67190 0.67211 0.66912 0.67226 0.67165 0.67083 λ7〇[ηηι1 396.5 394 395.5 383 381.5 383.5 385.5 386 X5fnml 355 354 354.5 345.5 341.5 344.5 346.5 346.5 Liquidus temperature [°0] 1240 1240 [Table 22] Example 158 159 160 161 162 163 164 165 Β2〇3 12.10 12.10 12.10 13.10 14.10 12.72 12.10 12.10 L&2〇3 33.50 33.50 30.50 33.50 33.50 32.52 27.50 33.50 Ta2〇5 Ti02 5.00 Nb205 3.10 5.10 5.10 5.10 5,10 4.95 5.10 W03 12.40 11.40 8.40 8. 40 9.40 11.07 8.40 10.00 Si02 6.90 6.90 6.90 5.90 4.90 5.73 6.90 5.40 Zr02 6.10 6.10 6.10 6.10 6.10 5.92 6.10 6.10 Gd]. 〗 25.90 24.90 30.90 27.90 26.90 27.09 33.90 27.90 ΥΛ Yb203 Li20 p2〇5 GeOj ZnO AI2O3 Bi20, Te02 '; ·!(' ‘ 158137.doc ·55· 201219333

Sn02 Sb2〇3 Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 Ti+Nb+W 15.50 16.50 13.50 13.50 14.50 16.02 13.50 15.00 B+Si 19.00 19.00 19.00 19.00 19.00 18.45 19.00 17.50 (Zr+Ta+Nb)/(B+Si) 0.484 0.589 0.589 0.589 0.589 0.589 0.589 0.349 La+Gd+Y+Yb 59.40 58.40 61.40 61.40 60.40 59.61 61.40 61.40 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Mg+Ca+Sr+Ba 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Li+Na+K+Cs 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 (B+Si+W)/(Ln+Zr+Li) 0.479 0.471 0.406 0.406 0.427 0.450 0.406 0.407 nd 1.87472 1.87938 1.87696 1.87755 1.87896 1.88364 1.87563 1.90712 vd 39.0 38.3 39.3 39.4 39.0 38.4 39.3 35.8 Partial dispersion ratio (eg,F) 0.57487 0.57541 0.57354 0.57290 0.57441 0.57620 0.57252 0.58264 Intercept b(a= 0.0025) 0.67237 0.67116 0.67179 0.67140 0.67191 0.67220 0.67077 0.67214 λτοίηΐΏ] 384.5 402.5 hfnml 349.5 357.5 Liquidus temperature [°c] 1220 1220 1220 1220 1220 1220 1240 [Table 23] Example 166 167 168 169 1 70 171 172 173 B2O3 12.10 12.10 12.10 12.10 13.10 12.04 12.10 12.10 L<a2〇3 33.50 39.50 33.50 32.50 36.50 36.32 36.50 31.40 Τ&2〇5 Ti〇2 Nb2〇5 5.10 6.10 6.10 5.10 6.10 6.07 5.80 5.10 W03 6.40 5.40 5.40 6.40 5.40 5.37 5.90 8.40 Si02 6.90 6.90 6.90 6.90 5.90 6.87 6.70 6.90 Zr02 6.10 5.10 5.10 6.10 5.10 5.57 5.Ϊ0 6.10 Gd2〇3 29.90 24.90 30.90 30.90 27.90 27.76 27.90 30.00 Y2O3 Yb203 Li20 158137.doc •56- 8 201219333 ρ20, Ge〇 2 ΖηΟ ΑΙ2Ο3 Βί,Ο, Te02 Sn02 Sb2〇3 Total 100.0 100.0 100.0 100,0 100.0 100.0 100Ό 100.0 Ti+Nb+W 11.50 11.50 11.50 11.50 11.50 11.44 11.70 13.50 B+Si 19.00 19.00 19.00 19.00 19.00 18.91 18.80 19.00 (Zr+ Ta+Nb)/(B+Si) 0.589 0.589 0.589 0.589 0.589 0.616 0.580 0.589 La+Gd+Y+Yb 63.40 64.40 64.40 63.40 64.40 64.08 64.40 61.40 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0,000 0,000 0.000 Mg+Ca+Sr+Ba 0.00 0.00 0.00 0.00 0. 00 0.00 0.00 0.00 Li+Na+K+Cs 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 (B+Si+W)/(Ln+Zr+Li) 0.365 0.351 0.351 0.365 0.351 0.349 0.355 0.406 nd 1.87606 1.87737 1.87528 1.87678 1.87841 1.87865 1.87826 1.87686 vd 40.0 40.1 40.2 40.0 40.0 39.8 39.9 39.3 Partial dispersion ratio (eg, f) 0.57195 0.57078 0.57228 0.57182 0.57169 0.57162 0.57221 0.57367 Intercept b (a=0.0025) 0.67195 0.67103 0.67278 0.67182 0.67169 0.67112 0.67196 0.67192 λ70_ 382.5 394 390.5 390.5 388 391.5 394 389.5 ^[nm] 344.5 343 343 345 343 343.5 344 347 Liquidus temperature [°c] 1260 1280 1260 1260 1260 】240 [Table 24] Example 174 175 176 177 178 179 180 181 B2〇3 12.10 12.10 11.90 12.10 12.10 12.10 12.10 12.10 La2〇3 31.40 36.50 36.50 31.40 43.40 31.40 33.50 27.50 Τ&2〇5 Ti02 Nb20, 5.10 6.10 6.10 6.60 5.10 5.10 5.10 5.10 W03 8.70 5.40 5.40 6.90 8.40 8.40 8.40 8.40 -57· 158137.doc 201219333

Si〇2 6.60 6.60 6.90 6.90 6.90 6.90 6.90 6.90 Zr02 6.10 5.10 5.30 6.10 6.10 7.30 6.10 6.10 Gd2〇3 30.00 28.20 27.90 30.00 18.00 28.80 27.90 33.90 y2〇3 Yb203 Li20 P,〇5 Ge〇2 ZnO A1203 Bi203 Te02 Sn02 Sb2〇 3 Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 Ti+Nb+W 13.80 11.50 11.50 13.50 13.50 13.50 13.50 13.50 B+Si 18.70 18.70 18.80 19.00 19.00 19.00 19.00 19.00 (Zr+Ta+Nb)/(B+Si) 0.599 0.599 0.606 0.668 0.589 0.653 0.589 0.589 La+Gd+Y+Yb 61.40 64.70 64.40 61.40 61.40 60.20 61.40 61.40 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Mg+Ca+Sr+Ba 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Li+Na+K+Cs 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 (B+Si+W)/(Ln+Zr+Li) 0.406 0.345 0.347 0.384 0.406 0.406 0.406 0.406 nd 1.88009 1.87989 1.87984 1.87879 1.88171 1.88003 1.87871 1.87604 Vd 39.1 39.9 39.8 39.2 39.2 39.1 39.3 39.4 Partial dispersion ratio (eg, f) 0.57384 0.57214 0.57201 0.57277 0.57384 0.57397 0.57309 0.57348 Cutting distance b (a= 0.0025) 0.67159 0.67189 0.67151 0.67077 0.67184 0.67172 0.67134 0.67198 λ7〇ίηπί! 386.5 392.5 391 384 388 385 383.5 ^fnm] 347.5 343.5 343.5 345.5 346 347.5 347 347 Liquid phase temperature [° c] 1240 1240 1240 1240 1220 1240 -58- I58I37.doc 201219333 [Table 25] Example 182 183 184 185 186 187 188 189 Β 20;) 12.10 12.10 12.10 12.10 12.10 12.10 12.10 12.10 La,. ;? 36.50 .39.50 42.50 39.50 33.00 33.50 36.00 42.00 Ta2〇5 Ti02 Nb,0, 5.10 6.10 6,10 7.20 5.10 5.60 5.10 5.10 W03 8.40 5.40 5.40 4.30 8.90 7.90 8.90 8.90 Si02 6.90 6.90 6.90 6.90 6.90 6.90 6.90 6.90 Zr02 6.10 5.10 5.10 5.10 6.10 6.10 6.10 6.10 Gd2〇i 24.90 24.90 21.90 24.90 27.90 27.90 24.90 18.90 Υ,ο, Yb203 Li20 p20, Ge〇2 ZnO A1203 Bi203 Te02 Sn02 Sb2〇3 Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 Ti+Nb+W 13.50 11.50 11.50 11.50 14.00 13.50 14.00 14.00 B+Si 19.00 19.00 19.00 19.00 19.00 19.00 19.00 19.00 (Zr+Ta+Nb)/(B+Si) 0.589 0.589 0.589 0.647 0.589 0.616 0.589 0.589 La+Gd+Y+Yb 61.40 64.40 64.40 64.40 60.90 61.40 60.90 60.90 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 MR+Ca+Sr+Ba 0.00 0.00 0.00 0.00 0.00 0.00 0,00 0.00 Li+Na+K+Cs 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 (B+Si+W)/(Ln+Zr+Li) 0.406 0.351 0.351 0.335 0.416 0 .399 0.416 0.416 nd 1.87952 1.87876 1.88010 1.87940 1.87879 1.87975 1.87969 1.88189 -59- 158137.doc 201219333

Vd 39.3 40.0 39.9 40.0 39.1 39.2 39.1 39.0 Partial dispersion ratio (eg,f) 0.57366 0.57117 0.57143 0.57136 0.57410 0.57327 0.57397 0.57415 Cutting distance b (a= 0.0025) 0.67191 0.67117 0.67118 0.67136 0.67185 0.67127 0.67172 0.67165 λ7〇[ηπι1 384.5 389 393 394 388.5 391 391.5 392 Xsfnml 346.5 343 343 341.5 349 348 348.5 348 Liquidus temperature fc] 1220 1250 1250 1250 1220 1240 1220 1220 [Table 26] Example 190 191 192 193 194 195 B2O3 12.10 12.10 12.10 12.10 12.10 12.10 La>2〇3 45.00 48.00 51.00 33.00 30.00 27.00 Ta2〇5 Ti02 Nb205 5.10 5.10 5.10 5.10 5.10 5.10 WO, 8.90 8.90 8.90 8.90 8.90 8.90 Si02 6.90 6.90 6.90 6.90 6.90 6.90 Zr02 6.10 6.10 6.10 6.10 6.10 6.10 Gd2〇3 15.90 12.90 9.90 27.90 30.90 33.90 Y2〇3 Yb203 Li20 P2O5 Ge〇2 ZnO A1203 Bi2〇3 Te02 Sn02 Sb203 Total 100.0 100.0 100.0 100.0 100.0 100.0 Ti+Nb+W 14.00 14.00 14.00 14.00 14.00 14.00 B+Si 19.00 19.00 19.00 19.00 19.00 19.00 (Zr +Ta+Nb)/(B+Si) 0.589 0.589 0.589 0.589 0.589 0.589 158137.doc -60· 8 201219333

La+Gd+Y+Yb 60.90 60.90 60.90 60.90 60.90 60.90 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 Mg+Ca+Sr+Ba 0.00 0.00 0.00 0.00 0.00 0.00 Li+Na+K+Cs 0.00 0.00 0.00 0.00 0.00 0.00 (B+Si+W)/(Ln+Zr+Li) 0.416 0.416 0.416 0.416 0.416 0.416 nd 1.88132 1.88230 1.88347 1.87719 1.87625 1.87468 Vd 39.1 39.0 39.0 39.2 39.2 39.3 Partial dispersion ratio (0g,F) 0.57453 0.57301 0.57402 0.57347 0.57379 0.57432 Intercept b (a=0.0025) 0.67228 0.67051 0.67152 0.67147 0.67179 0.67257 λ70『ηηι1 386.5 387 389.5 385 386.5 384 λ5[ηηι] 347.5 347 347 348 348.5 348.5 Liquid phase temperature [°c] 1220 1220 1240 [Table 27] Example 190 191 192 193 194 195 196 197 B2〇3 12.10 12.10 12.10 12.10 12.10 12.10 11.98 10.43 L32〇1 45.00 48.00 51.00 33.00 30.00 27.00 44.59 47.50 Ta2〇5 Ti02 5.99 9.51 Nb205 5.10 5.10 5.10 5.10 5.10 5.10 7.07 7.38 W03 8.90 8.90 8.90 8.90 8.90 8.90 Si02 6.90 6.90 6.90 6.90 6.90 6.90 7.09 5.93 Zr02 6.10 6.10 6.10 6.10 6.10 6.10 4.88 5.37 Gd2〇3 15.90 12.90 9.90 27 .90 30.90 33.90 12.18 9.80 Y203 1.37 0.96 Yb203 Li20 p2〇, Ge02 ZnO 4.85 3.12 Α1Λ Bi203 TeO? • 61 - 158137.doc 201219333

Sn02 Sb: 〇3 Total 100.0 100.0 100.0 100.0 100.0 100.0 100.0 100.0 Ti+Nb+W 14.00 14.00 14.00 14.00 14.00 14.00 13.06 16.89 B+Si 19.00 19.00 19.00 19.00 19.00 19.00 19.07 16.36 (Zr+Ta+Nb)/(B+Si ) 0.589 0.589 0.589 0.589 0.589 0.589 0.627 0.779 La+Gd+Y+Yb 60.90 60.90 60.90 60.90 60.90 60.90 58.14 58.26 Ta/(Ln+2r+Nb+W) 0.000 0.000 0.000 0.000 0.000 0,000 0.000 0.000 Mg+Ca+Sr+Ba 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 Li+Na+K+Cs 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 (B+Si+W)/(Ln+Zr+Li) 0.416 0.416 0.416 0.416 0.416 0.416 0.303 0.257 nd 1.88132 1.88230 1.88347 1.87719 1.87625 1.87468 1.90806 1.95411 Vd 39.1 39.0 39.0 39.2 39.2 39.3 35.3 32.0 Partial dispersion ratio (eg, f) 0.57453 0.57301 0.57402 0.57347 0.57379 0.57432 0.58288 0.59222 戠 distance b (a=0.0025) 0.67228 0.67051 0.67152 0.67147 0.67179 0.67257 0.67111 0.67222 λ7〇ίηηι] 386.5 387 389.5 385 386.5 384 386.5 418 347.5 347 347 348 348.5 348.5 347.5 359 Liquid phase temperature [°c] 1220 1220 1240 1220 1220 [Table 2 8] Example 198 199 200 201 202 203 204 205 B2〇3 12.601 12.601 12.601 12.535 12.535 12.535 12.535 12.535 29.939 34.939 39.939 40.849 40.849 40.849 40.849 40.849 Τ^2〇5 13.882 13.882 13.882 13.882 13.882 Ti02 0.219 0.219 0.219 0.219 0.219 Nb?〇 s 3.954 3.954 3.954 1.143 1.143 1.143 1.143 1.143 W03 9.J71 9.171 9.171 1.749 1.749 1,749 1.749 1.749 Si02 6.318 6.318 6.318 5.788 5.788 5.788 5.788 5.788 Zr02 6,263 6.263 6.263 6.170 6.170 6.170 6.170 6.170 Gd2〇3 31.557 23.557 21.557 15.446 13.446 11.446 8.446 5.446 Y2 〇3 3.000 2.000 4.000 6.000 9.000 12.000 Yb20, Li20 158137.doc •62-

201219333 Ρ,Ο, Ge〇2 ΖηΟ 0.169 0.169 0.169 0.169 0.169 ΑΙ2Ο3 Bi203 Te02 Sn02 Sb2〇3 0.196 0.196 0.196 0.050 0.050 0.050 0.050 0.050 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 13.125 13.125 13.125 3.110 3.110 3.110 3.110 3.110 B+Si 18.919 18.919 18.919 18.323 18.323 18.323 18.323 18.323 (Zr+Ta+Nb)/(B+Si) 0.540 0.540 0.540 1.157 1.157 1.157 1.157 1.157 La+Gd+Y+Yb 61.497 61.497 61.497 58.296 58.296 58.296 58.296 58.296 Ta/ (Ln+Zr+Nb+W) 0.000 0.000 0.000 0.206 0.206 0.206 0.206 0.206 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+ Si+W)/(Ln+Zr+Li) 0.415 0.415 0.415 0.311 0.311 0.311 0.311 0.311 nd 1.87676 1.87787 1.87989 1.88096 1.88026 1.88013 1.87973 1.87890 vd 39.5 39.5 39.4 40.7 40.8 40.9 41.0 41.0 Partial dispersion ratio (0g, F) 0.57291 0.57265 0.57252 0.56707 0.56752 0.56712 0.56704 0.56696 Carrying distance b (a=0.0025) 0.6 7166 0.67140 0.67102 0.66882 0.66952 0.66937 0.66954 0.66946 λ7〇ΓηΓη1 384 383.5 383.5 383.5 384 λ5[ηΐΏΐ 338 337.5 337.5 338 337.5 Liquidus temperature [°c] 1210 1210 [Table 29] Example 206 207 208 209 210 211 212 213 B2O3 12.535 12.535 12.035 11.535 12.535 12.535 12.535 10.750 L&2〇3 40.849 42.849 42.849 42.849 42.849 44.849 46.849 43.180 Ta20.-5 13.882 13.882 13.882 13.882 13.882 13.882 13.882 13.370 Ti02 0.219 0.219 0.219 0.219 0.219 0.219 0.219 Nb205 1.143 1.143 1.143 1.143 1.143 1.143 1.143 1.470 WO, 1.749 1.749 1.749 1.749 1.749 1.749 1.749 1.300 -63· 158137.doc 201219333

SiO? 5.788 5.788 6.288 6.788 5.788 5.788 5.788 6.510 ZrO, 6.170 6.170 6.170 6.170 6.170 6.170 6.170 5.300 Gd203 2.446 8.446 8.446 8.446 15.446 13.446 11.446 9.610 Y,〇, 15.000 7.000 7.000 7.000 3.820 Yb Office Li20 P,〇5 Ge02 2nO 0.169 0.169 0.169 0.169 0.169 0.169 0.169 4.680 ai2o3 Bi203 Te02 Sn02 St>2〇3 0.050 0.050 0.050 0.050 0.050 0.050 0.050 0.010 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 3.110 3.110 3.110 3.110 3.110 3.110 3.110 2.770 B+Si 18.323 18.323 18.323 18.323 18.323 18.323 18.323 17.260 (ZrfTa+Nb)/(B+Si) 1.157 1.157 1.157 1.157 1.157 \.\51 】·157 J.167 La+Gd+Y+Yb 58.296 58.296 58.296 58.296 58.296 58.296 58.296 56.610 Ta/(Ln +Zr+Nb+W) 0.206 0.206 0.206 0.206 0,206 0.206 0.206 0.207 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+ W) / (Ln + Zr + Li) 0.311 0.311 0.311 0.311 0.311 0.31 1 0.311 0.300 nd 1.87837 1.88029 1.88052 1.88064 1.88196 1.88252 1.88327 1.88323 Vh 41.1 40.9 40.9 40.8 40.8 40.7 40.7 40.7 Partial dispersion ratio (0g, F) 0.56715 0.56758 0.56752 0.56818 0.56793 0.56760 0.56728 0.56708 Intercept b(a= 0.0025) 0.66990 0.66983 0.66977 0.67018 0.66993 0.66935 0.66903 0.66883 λ7〇ίηπΊΐ 382 383.5 384.5 384 383.5 384 384.5 377 λ5[ηιτι1 337.5 337.5 337.5 337.5 337.5 337.5 337.5 333 Liquidus temperature [°c] 1210 158137.doc • 64-

201219333 [Table 30] Example 214 215 216 217 218 219 220 221 B2〇3 11.050 11.350 11.350 11.450 11.427 12.535 12.035 11.535 La2〇3 43.180 43.180 43.180 43.180 44.653 40.849 40.849 40.849 Ta205 13.370 13.370 13.870 13.870 13.826 13.882 13.882 13.882 Ti02 0.219 0.219 0.219 Nb205 1.470 1.470 1.270 1.470 1.520 1.143 1.143 1.143 W03 1.600 1.600 1.700 1.600 1.655 1.749 1.749 1.749 Si02 6.510 6.510 6.510 6.510 6.732 5.788 6.288 6.788 Zr02 5.300 5.800 5.800 5.800 5.481 6.170 6.170 6.170 Gd20, 9.610 9.610 9.310 9.610 9.938 17.446 17.446 17.446 3.820 3.820 3.820 3.820 3.950 Yb20, Li20 P2〇s Ge〇2 ZnO 4.080 3.280 3.Ϊ80 2.680 0.809 0.169 0.169 0.169 A1203 Bi203 Te02 Sn02 Sb2〇3 0.010 0.010 0.010 0.010 0.010 0.050 0.050 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 3.070 3.070 2.970 3.070 3.175 3.110 3.110 3.110 B+Si 17.560 17.860 17.860 17.960 18.159 18.323 18.323 18 .323 (Zr+Ta+Nb)/(B+Si) 1.147 1.156 1.172 1.177 1.147 1.157 1.157 1.157 La+Gd+Y+Yb 56.610 56.610 56.310 56.610 58.541 58.296 58.296 58.296 Ta/(Ln+Zr+Nb+W) 0.206 0.204 0.213 0.212 0.206 0.206 0.206 0.206 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln+Zr+ Li) 0.309 0.312 0.315 0.313 0.309 0.311 0.311 0.311 ΓΜ 1.88160 1.88096 1.88078 1.88094 1,88086 1.88124 1.88099 1.88117 -65- 158137.doc 201219333

Vd 40.7 40.8 40.8 40.8 40.9 40.7 40.7 40.7 Partial dispersion ratio (eg,f) 0.56747 0.56759 0.56713 0.56759 0.56738 0.56727 0.56753 0.56741 Intercept b (a= 0.0025) 0.66922 0.66959 0.66913 0.66959 0.66963 0.66902 0.66928 0.66916 X70fnml 376 375.5 380.5 377 379 384 384 383 X^fnml 334 334 335 334.5 334.5 338 338 338 Liquidus temperature [°c] 1210 1210 1210 1210 1210 [Table 31] Example 222 223 224 225 226 227 228 229 β20, 11.835 11.835 11.835 11.735 10.750 11.050 10.750 11.190 La,2 〇i 40.849 42.849 40.849 41.149 43.180 42.580 43.180 43.280 Τ&2〇5 13.882 13.882 13.882 13.882 13.370 13.670 13.870 13.870 Ti〇2 0.219 0.219 0.219 0.219 Nb205 1.143 1.143 1.143 1.143 1.470 1.470 1.170 1.470 WO, 1.749 1.749 1.749 1.549 1.300 1.600 1.800 1.500 Si02 6.488 6.488 6.488 6.488 6.470 6.470 6.470 6.470 Zr02 6.170 6.170 6.170 6.170 5.300 5.300 5.600 5.300 Gd2〇3 17.446 15.446 15.446 17.446 9.610 9.610 9.610 9.610 2.000 3.820 3.820 3.820 3.820 Yb20, Li,0 ΡΛ Ge0 2 ZnO 0.169 0.169 0.169 0.169 4.680 4.380 3.680 3.440 A!2〇3 Bi,0, TeO, Sn02 Sb2〇3 0.050 0.050 0.050 0.050 0.050 0.050 0.050 0.050 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 3.110 3.110 3.110 2.910 2.770 3.070 2.970 2.970 B+Si 18.323 18.323 18.323 18.223 17.220 17.520 17.220 17.660 (2r+Ta+Nb)/(B+Si) 1.157 1.157 1.157 1.163 1.170 1.167 1.199 1.169 •66- 158137.doc 201219333

La+Gd+Y+Yb 58.296 58.296 58.296 58.596 56.610 56.010 56.610 56.710 Ta/(Ln+Zr+Nb+W) 0.206 0.206 0.206 0.206 0.207 0.212 0.213 0,213 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li +Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln+Zr+Li) 0.311 0.311 0.311 0.305 0.299 0.312 0.306 0.309 nri 1.88143 1.88204 1.88114 1.88241 1.88383 1.88188 1.88525 1.88228 40.7 40.7 40.8 40.8 40.6 40.6 40.6 40.7 Partial dispersion ratio (eg' f) 0.56813 0.56807 0.56753 0.56813 0.56690 0.57005 0.56809 0.56760 Intercept b(a=0.0025) 0.66988 0.66982 0.66953 0.67013 0.66840 0.67155 0.66959 0.66935 λ70“ηητ| 380.5 381 380 kfnml 337.5 337.5 337.5 Liquidus temperature [°c] 1210 1210 [Table 32] Example 230 231 232 233 234 235 236 237 Β20: ϊ 11.410 11.420 12.015 12.015 11.440 11.450 11.397 12.100 La20^ 43.220 43.180 40.919 40.939 43.310 43.270 43.094 45.000 Ta205 13.870 13.870 13.882 13.882 13.870 13.870 13.842 Ti02 0.219 0.219 0.200 Nb205 1.470 1.470 1.143 1.143 1.470 1.470 1.467 5.100 W03 1.600 1,600 1,699 1.679 L510 1.510 1.597 10.100 Si02 6.470 6.470 6.288 6.288 6.470 6.470 6.457 6.900 Zr02 5.800 5.830 6.170 6.170 5,800 5,830 5.818 6.100 Gd2〇3 9.610 9.610 17.446 17.446 9.610 9.610 9.591 14.700 ΥΛ 3.820 3.820 3.820 3.820 3.812 YbA LhO ΡΛ GeOj ZnO 2.680 2.680 0.169 0.169 2.650 2.650 2.675 Α1Λ BiA Te02 -67- 158137.doc 201219333

Sn02 Sb203 0.050 0.050 0.050 0.050 0.050 0.050 0.050 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 3.070 3.070 3.060 3.040 2.980 2.980 3.263 15.200 B+Si 17.880 17.890 18.303 18.303 17.910 17.920 17.854 19.000 (Zr+Ta+Nb)/ (B+Si) 1.182 1.183 1.158 1.158 1.180 1.181 1.183 0.589 La+Gd+Y+Yb 56.650 56.610 58.366 58.386 56.740 56.700 56.497 59.700 Ta/(Ln+2r+Nb+W) 0.212 0.2J2 0.206 0.206 0.212 0.212 0.212 0.000 Mg+ Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln+Zr+Li) 0.312 0.312 0.310 0.310 0.311 0.311 0.312 0.442 nrf 1.88227 1.88230 1.88236 1.88233 1.88191 1.88196 1.88352 1.88376 vd 40.7 40.7 40.7 40.7 40.8 40.8 40.5 38.6 Partial dispersion ratio (eg,F) 0.56800 0.56827 0.56807 0.56787 0.56839 0.56793 0.56920 0.57474 Intercept b (a= 0.0025) 0.66975 0.67002 0.66982 0.66962 0.67039 0.66993 0.67045 0.67124 λ70_1 379.5 377.5 386 390.5 hfnml 342.5 334.5 336.5 348.5 liquid phase Temperature [°c] 1210 1210 1210 1210 1210 1210 [Table 33] Example 238 239 240 241 242 243 244 245 B2〇3 12.100 12.100 12.100 12.100 12.100 12.100 12.100 12.100 42.000 39.000 45.000 45.000 42.000 36.000 33.000 30.000 Ta2〇5 Ti02 Nb205 5.100 5.100 5.100 5.100 5.100 5.100 5.100 5.100 W〇3 10.100 10.100 10.100 10.100 10.100 10.100 10.100 10.100 Si02 6.900 6.900 6.900 6.900 6.900 6.900 6.900 6.900 Zr02 6.100 6.100 6.100 6.100 6.100 6.100 6.100 6.100 Gd20, 17.700 20.700 11.700 8.700 14.700 23.700 26.700 29.700 Y2〇3 3.000 6.000 3.000 Yb20, Li20 -68 - 158137.doc 201219333 Ρ7.0, Ge02 ΖηΟ Al2〇3 Bi2〇3 Te02 Sn02 Sb20, Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 15.200 15.200 15.200 15.200 15.200 15.200 15.200 15.200 B+Si 19.000 19.000 19.000 19.000 19.000 19.000 19.000 19.000 (Zr+Ta+Nb)/(B+Si) 0.589 0.589 0.589 0.589 0.589 0.589 0.589 0.589 La+ Gd+Y+Yb 59.700 59.700 59.700 59.700 59.700 59.700 59.700 59.700 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na +K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln+Zr+Li) 0.442 0.442 0.442 0.442 0.442 0.442 0.442 0.442 nd 1.88269 1.88483 1.88243 1.88207 1.88232 1.88060 1.87972 1.87867 vd 38.7 38.6 38.8 38.8 38.7 38.7 38.7 38.7 Partial dispersion ratio (0g, F) 0.57537 0.57498 0.57488 0.57501 0.57507 0.57520 0.57451 0.57470 Intercept b(a=0.0025) 0.67212 0.67148 0.67188 0.67201 0.67182 0.67195 0.67126 0.67145 λ70_ 388 388.5 390.5 392 391 401.5 390.5 390.5 X5fnml 348.5 349 349 349 349 349.5 350 350 Liquidus temperature [°c] 1210 1210 [Table 34] Example 246 247 248 249 250 251 252 253 B2〇3 12.100 12.100 12.100 12.100 12.100 12.100 12.100 12.100 La2〇3 48.000 51.000 54.000 45.000 45.000 45.000 42.000 39.000 Τ& 2〇5 Ti02 Nb2Os 5.100 5.100 5.100 5.100 5.100 5.100 5.100 5.100 W 03 10.100 10.100 10.100 10.100 10.100 10.100 10.100 10.100 158137.doc -69- ς 201219333

Si02 6.900 6.900 6.900 6.900 6.900 6.900 6.900 6.900 Zr02 6.100 6.100 6.100 6.100 6.100 6.100 6.100 6.100 11.700 8.700 5.700 5.700 2.700 5.700 8.700 ΥΛ 9.000 12.000 14.700 12.000 12.000 Yb20, Li20 P2〇s Ge〇2 ZnO AI2O3 Bi20, Te02 Sn02 Sb2〇i Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 15.200 15.200 15.200 15.200 15.200 15.200 15.200 15.200 B+Si 19.000 19.000 19.000 19.000 19.000 19.000 19.000 19.000 (Zr+Ta+Nb)/(B+Si) 0.589 0.589 0.589 0.589 0.589 0.589 0.589 0.589 La+Gd+Y+Yb 59.700 59.700 59.700 59.700 59.700 59.700 59.700 - 59.700 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na dec K+Cs 0.000 0.000 0.000 0.000 0.000 0:000 0.000 0.000 (B+Si+W)/(Ln+Zr+Li) 0.442 0.442 0.442 0.442 0.442 0.442 0.442 0.442 nd 1.88440 1.88475 1.88624 1.88187 1.88161 1.88155 1.88092 1.87978 Vd 38.6 38.6 38.6 38.8 38.9 39.0 38.9 38.9 Partial dispersion ratio (eg,f) 0.57511 0.57555 0.57491 0.57445 0.57414 0.57446 0.57420 0.57434 Intercept b(a= 0.0025) 0.67161 0.67205 0.67141 0.67145 0.67139 0.67196 0.67145 0.67159 λ70『ηηι1 391.5 390.5 391.5 392.5 393.5 395 391 393 X5fnml 348.5 348.5 348.5 349 349 349 349.5 349.5 Liquidus temperature [°c] 158137.doc • 70- .8 201219333 [Table 35] Example 254 255 256 257 258 259 260 261 Β, Ο, 12.100 12.100 12.100 12.100 12.100 12.100 12.100 12.100 L&2〇3 36.000 42.000 39.000 36.000 45.000 45.000 47.000 45.000 Ta205 Ti02 Nb205 5.100 5.100 5.100 5.100 5.100 5.100 5.100 4.100 W03 10.100 10.100 10.100 10.100 10.800 11.200 11.200 12.100 Si02 6.900 6.900 6.900 6.900 6.900 6.900 6.900 6.900 Zr02 6.100 6.100 6.100 6.100 6.100 6.100 6.100 6.100 Gd2〇^ 11.700 8.000 8.900 ΥΛ 12.000 17.700 20.700 23.700 6.000 13.600 11.600 4.800 Yb20, Li20 P2〇5 Ge02 ZnO AI2〇3 Bi203 Te02 Sn02 Sb2〇3 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 15.200 15.200 15.200 15.200 15.900 16.300 16.300 16.200 B+Si 19.000 19.000 19.000 19,000 19.000 19.000 19.000 19.000 (Zr ten Ta+Nb)/(B+ Si) 0.589 0.589 0.589 0.589 0.589 0.589 0.589 0.537 La+Gd+Y+Yb 59.700 59.700 59.700 59.700 59.000 58.600 58.600 58.700 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Mg+Ca+Sr+ Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln+Zr+Li) 0.442 0.442 0.442 0.442 0.458 0.467 0.467 0.480 nd 1.87906 1.88022 1.87924 1.87781 1.88379 1.88279 1.88329 1.88074 -71 - 158137.doc 201219333

Vd 38.9 39.0 39.1 39.1 38.5 38.6 38.5 38.6 Partial dispersion ratio (eg, f) 0.57440 0.57491 0.57588 0.56907 0.57541 0.57630 0.57504 0.57544 Intercept b(a=0.0025) 0.67 J 65 0.6724J 0.67363 0.66682 0.67166 0.67280 0.67129 0.67194 λ70[ηηϊ1 390.5 394.5 395 404 390.5 395 391.5 388.5 λ5Γηπι 349.5 349 349.5 350 349.5 350 349.5 350 Liquidus temperature [°c] 1220 [Table 36] Example 262 263 264 265 266 267 268 269 B2O3 12.100 12.100 12.100 12.100 12.100 12.100 12.100 12.600 La2〇3 45.000 42.000 46.000 47.000 48.000 49.800 49.300 46.000 T&2〇5 Ti02 Nb2〇s 4.600 4.100 4.100 4.100 4.100 4.100 3.100 4.100 W〇3 11.100 12.100 12.100 12.100 12.100 12.100 13.600 12.100 Si02 6.900 6.900 6.900 6.900 6.900 6.900 6.900 6.400 Zr02 6.100 6.100 6.100 6.100 6.100 6.100 6.100 6.100 Gd2〇3 8.700 8.900 8.900 8.900 8.900 8.900 8.900 8.900 Y2〇3 5.500 7.800 3.800 2.800 1.800 3.800 Yb20, Li20 p205 Ge〇2 ZnO AI2O3 Bi203 Te02 Sn02 Sb2〇3 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 15.700 16.200 16.200 16.200 16.200 16.200 16.700 16.200 B+Si 19.000 19.000 19.000 19.000 19.000 19.000 19.000 19.000 (Zr+Ta+Nb)/(B+Si ) 0.563 0.537 0.537 0.537 0.537 0.537 0.484 0.537 •72- 158137.doc 201219333

La+Gd+Y+Yb 59.200 58.700 58.700 58.700 58.700 58.700 58.200 58.700 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li +Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln+Zr+Li) 0.461 0.480 0.480 0.480 0.480 0.480 0.507 0.480 nd 1.88135 1.87932 1.88106 1.88183 1.88212 1.88285 1.88068 1.88103 vd 38.7 38.7 38.6 38.6 38.6 38.5 38.5 38.6 Partial dispersion ratio (eg, f) 0.57532 0.57482 0.57493 0.57568 0.57561 0.57541 0,57586 0,57562 Cutting distance b (a=0.0025) 0.67207 0.67157 0.67143 0.67218 0.67211 0.67166 0.67211 0.67212 λ7〇_ 389.5 389 391 391 390.5 390.5 389.5 389.5 ^nml 349.5 350 350 350 350 349.5 350 350 liquid phase temperature [°c] 1220 1220 [Table 37] Example 270 271 272 273 274 275 276 277 B2O3 12.600 13.100 12.100 12.100 12.600 13.600 13.237 12.700 Lfl2〇3 48.000 48.000 42.100 42.100 42.100 42.500 35.263 42.500 Τ^2〇5 Ti02 Nb205 4.100 4.100 4.100 4.100 4.100 8.600 5.368 8.600 W03 12.100 12.100 12.300 12.300 12.300 2.400 5.684 2.400 Si02 6.400 5.900 6.850 6.820 6.350 6.900 6.763 6.900 Zr02 6.100 6.100 6.100 6.100 6.100 6.100 6.421 6.100 Gd2〇3 8.900 8.900 8.900 8.900 8.900 16.400 27.263 9.200 1.800 1.800 7.500 7.500 7.500 3.500 3.500 Yb20, Li?0 ΡΛ Ge〇2 ZnO 8.100 A1203 Bi203 Te02 -73- 158137.doc 201219333

Sn02 Sb2〇3 0.050 0.080 0.050 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 16.200 16.200 16.400 16.400 16.400 11.000 11.053 11.000 B+Si 19.000 19.000 18,950 18.920 18.950 20.500 20.000 19.600 (Zr+Ta+Nb)/(B +Si) 0.537 0.537 0.538 0.539 0.538 0.7Π 0.589 0.750 La+Gd+Y+Yb 58.700 58.700 58.500 58.500 58.500 62.400 62.526 55.200 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Mg+Ca+ Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln+Zr+Li) 0.480 0.480 0.484 0.483 0.484 0.334 0.373 0.359 nd 1.88217 1.88250 1.88095 1.88124 1.88082 1.87485 1.87055 1.87443 vd 38.6 38.6 38.6 38.5 38.6 40.0 40.3 39.4 Partial dispersion ratio (0g, F) 0.57605 0.57586 0.57574 0.57517 0.57581 0.57104 0.57077 0.57201 Intercept b (a=0.0025) 0.67255 0.67236 0.67224 0.67142 0.67231 0.67104 0.67152 0.67051 λ70 [ηηι] 389.5 398 402.5 399 392.5 389 386 349.5 353.5 355.5 353.5 339 345 3 37.5 Liquidus temperature [°c] [Table 38] Example 278 279 280 281 282 283 284 285 B2〇3 11.500 12.600 12.600 12.600 15.600 12.100 12.100 12.100 L&2〇3 42.500 42.500 42.500 43.800 43.500 42.100 45.100 42.100 Ta2〇5 Ti02 2.400 Nb,0, 4.100 4.100 2.100 2.100 8.600 9.100 9.100 11.100 WO, 6.900 7.900 10.900 10.900 7.300 7.300 5.300 Si02 6.900 6.900 6.900 6.900 6.900 6.820 6.820 6.820 Zr02 6.100 6.100 6.100 6.100 6.100 6.100 6.100 6.100 Gd2〇3 10.400 16.400 15.400 10.100 13.400 8.900 8.900 16.400 Y2〇3 3.500 3.500 3.500 7.500 3.500 7.500 4.500 Yb,0, Li20 -74- 158137.doc 201219333 P.Os Ge〇2 ZnO 8.100 ai2o3 Bi203 Te02 Sn02 Sb2〇3 0.080 0.080 0.080 Total 100.00 100.00 100.00 100.00 100.00 100.00 100.00 100.00 Ti+Nb+W 11.000 12.000 13.000 13.000 11.000 16.400 16.400 16.400 B+Si 18.400 19.500 19.500 19.500 22.500 18.920 18.920 18.920 (Zr+Ta+Nb)/(B+Si) 0.554 0.523 0.421 0.421 0.653 0.8 03 0.803 0.909 La+Gd+Y+Yb 56.400 62.400 61.400 61.400 60.400 58.500 58.500 58.500 Ta/(Ln+Zr+Nb+W) 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Mg+Ca+Sr+Ba 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 Li+Na+K+Cs 0.000 0.000 0.000 0.000 0.000 0.000 0.000 0.000 (B+Si+W)/(Ln+Zr+Li) 0.405 0.400 0.450 0.450 0.338 0.406 0.406 0.375 nd 1.87525 1.87370 1.87006 1.87017 1.87210 1.89175 1.89282 1.89747 vd 39.6 40.1 40.1 40.2 38.8 37.7 37.7 37.2 Partial dispersion ratio (eg, f) 0.57214 0.57163 0,57196 0.57156 0,57372 0.57596 0.57613 0.57652 Wear distance b (a=0.0025) 0.67114 0.67188 0.67221 0.67206 0.67072 0.67021 0.67038 0.66952 X70[nml 391 390.5 388.5 389 392.5 λ5[ηπι] 345 346 348 348 344.5 Liquidus temperature [°c] As shown in Tables 1 to 38, in any of the optical glasses of the examples (No. J to No. 285) of the present invention, The phase temperature is 1300 ° C or lower, more specifically 1260 ° C or lower, which is within the desired range. Therefore, it is understood that the optical glass of the embodiment of the present invention has a low liquidus temperature. In addition, since any of the reference examples (No. A to No. B) and the comparative examples (No. A to No. B) were devitrified, it was estimated that the liquidus temperature was higher. Further, in the optical glass of the embodiment of the present invention, λ7 〇 (the transmittance is -75-158137.doc 201219333

Hard to color. In the optical glass of the embodiment of the present invention, the λ5 (wearing) is not more than 4 〇〇 nm, and more specifically, therefore, the optical glass of the embodiment of the present invention is known ( Nd) is 1.75 or more (nd) and is 2.00 or less. Further, in the optical glass of the embodiment of the present invention, the refractive index 'is more specifically 1.86 or more, and the refractive index is more specifically 197 or less' is a desired range. In the optical glass of the embodiment of the present invention, the Abbe number of either

Od) is 30 or more, and the Abbe number (Vd) is 5 Å or less, and more specifically 42 or less, which is within a desired range. Further, in the optical glass of the embodiment of the present invention, the partial dispersion ratio (eg, F) of either of them is (_2.5〇xl〇-3XVd+〇6571) or more, and more specifically (2.50x10 xVd+) 〇.6665) Above. On the other hand, the partial dispersion ratio of the optical glass of the embodiment of the present invention is (·2·5·1〇-3χ~+〇6971) below 'in more detail (_2.5〇xl〇-3xVd+〇. 6813) below. Therefore, it is known that the partial dispersion ratio (0g, F) of Shai or the like is within the desired range. Therefore, it is understood that the refractive index and the Abbe number (vd) of the optical glass of the embodiment of the present invention are within a desired range, and can be produced at low cost, with poor resistance to breakage and less coloration. Further, the glass brick is formed using the optical glass of the embodiment of the present invention, and the glass block is ground and polished to form a lens and a crucible. The result ' can be stably processed into various lenses and shapes of the crucible. The present invention has been described in detail with reference to the accompanying drawings. 15B137.doc -77-

Claims (1)

201219333 VII. Patent application scope: 1. An optical glass containing 1〇3 component 10~3〇〇%&La2〇3 component 10.0~55.0% by mass% with respect to the total mass of the oxide composition. And the content of the Ta2〇5 component is 2% or less. 2. The optical glass according to claim 1, which contains, in the oxide-converted composition, at least one selected from the group consisting of a Ti 2 component, a Nb 2 5 component, and a w 3 component. 3. The optical glass of claim 2, wherein the sum of the content of the group selected from the group consisting of Ti2 component, muscle component 2 component, and W3 component is in comparison with the oxide composition of the oxide. The total mass is 〇5% or more and 4% or less. 4. The optical glass of claim 2, which comprises, by mass%, of the total mass of the glass in terms of oxide conversion: 0 to 20.0% of the Ti 2 component and/or 0 to 20.0% of the Nb 2 5 component and/or W〇3 composition 0~25.0〇/〇. 5_The optical glass of the requester's glass (10) with respect to the oxide-converted composition further contains, in mass%, the following components: Si〇2 component 〇~20.0% and/or Zr〇2 component 0~12.0 %. 6. The optical glass of claim 1, wherein the content of the B2〇3 component and the Si〇2 component is Μ or less with respect to the total mass of the glass of the oxide conversion composition. 7. For the optical glass of the request, the mass ratio of the oxide in the yttrium is 158137.doc 201219333 (ZrO2+Ta2〇5+Nb2O5)/(B2O3+SiO2A2.0(mT. 8. Optical glass as requested) The total mass of the glass relative to the oxide-converted composition further includes the following components in terms of mass: 〇: Gd2〇3 component 0~45.0% and/or Y2〇3 component 0~30.0% and/or Yb2〇3 Ingredients 0 to 20.0% » 9· As requested in the optical glass, the mass of the Ln2〇3 component (where h is selected from the group consisting of La, Gd, Y, Yb) and relative to The total mass of the glass in the oxide conversion composition is 3 〇 or more and 7 5 · 0% or less. 10. The optical glass of claim 9 has a tLn2 〇 3 component (wherein Ln is free for La, Gd, Y, Yb) The mass of the constituents of the group of the above-mentioned groups and the total mass of the glass with respect to the oxide conversion composition is more than 4% by weight. 11. The optical glass of claim 1, wherein the mass of the oxide conversion composition is t205/ (Ln2〇3+Zr02+Nb2〇5+W〇3) is 〇3〇〇 or less (wherein ^ is one selected from the group consisting of La, Gd, Y, Yb) The above is as follows. 12. The optical glass of the claim , is the total mass of the glass in terms of oxide conversion, and further contains the following components in mass %. MgO component 0-20.0% and/or CaO component 〇~20.0 % and / or SrO component 0-20.0% and / or BaO component 〇 ~ 25.0%. 13_ The optical glass of claim 12, wherein R 〇 component (where r is selected from the group consisting of Mg, Ca, Sr, Ba The quality of one or more of the constituent groups = and 158137.doc 201219333 The total mass of the glass in the oxide conversion composition is 25% or less. 14. 15. 16. 17. The optical glass according to item 1 is relatively The total mass of the glass in terms of the oxide-converted composition further includes, in mass%, the following components: Li2〇 component 〇10.0% and/or Na2〇 component 〇10.0% and/or κ2〇 component 〇10.0% and/or Cs2〇component 〇~10.0%. The optical glass of claim 14, wherein the mass of the component such as 2〇 (wherein Rn is one or more selected from the group consisting of Li, Na, K, and Cs) is relative to The total mass of the glass of the oxide conversion composition is 15. 〇 ° /. The optical glass of claim 1 In the glass, the mass ratio of the oxide-converted composition (B203 + Si〇2+W03) / (Ln203 + Zr 〇 2 + Li 2 〇) is 〇 2 〇 or more and 2 〇〇 or less. The optical glass of claim 1, which further contains, by mass%, the following components in terms of mass% of the glass of the oxide conversion composition: ?2〇5 component 0 to 10.0% and/or Ge02 component 〇10.0% and/or Or ZnO component 〇~25.0% and/or Al2〇3 component 〇~1〇.〇% and/or Ga203 component 0~10.0% and/or Bi203 component 0~20.0% and/or Te02 component 0~20.0% and/or Or Sn02 component 0~1.0% and/or Sb203 component 0~1·0%. The optical glass of claim 1, which has a refractive index (nd) of 1.75 or more and an Abbe number (vd) of 30 or more and 50 or less. 19. The optical glass of claim 1 which has a liquidus temperature of 13 〇〇 «c or less. 20. An optical element which is an optical glass according to any one of claims 1 to 19 as a base material. An optical device comprising the optical element of claim 2A. 158137.doc -4 201219333 IV. Designated representative map: (1) The representative representative of the case is: (none) (2) The symbol of the symbol of the representative figure is simple: 5. If there is a chemical formula in this case, please reveal the best display invention. Characteristic chemical formula: (none) I58137.doc 8