JP6564861B2 - Lens shape generation apparatus, spectacle lens manufacturing system, lens shape generation method, and spectacle lens manufacturing method - Google Patents

Description

  The present invention relates to a lens shape generation device, a spectacle lens manufacturing system, a lens shape generation method, a spectacle lens manufacturing method, and a lens.

  Among the spectacle lenses, lenses that are specially ordered are obtained by prescription data for spectacle lens wearers when a spectacle lens manufacturer receives an order from a spectacle store, and based on the prescription data, one side of a lens called a semi-finished lens Is processed as a spectacle lens that satisfies the wearer's prescription. The ground and polished lens is subjected to processing such as surface treatment and then supplied to an eyeglass store. In the spectacle store, the periphery of the lens is cut (lens shape processing) in accordance with the frame selected by the wearer, and is attached to the frame and provided to the wearer. Note that this lens shape processing may be performed by a spectacle lens manufacturer. In this case, a lens (lens lens) processed in accordance with the frame is provided to the spectacle store.

  A semi-finished lens processed by a spectacle lens manufacturer is generally a circular shape of about 70 to 85φ, and is formed as a lens having a considerable thickness. Usually, the outer surface (object side surface) of the semi-finished lens is a spherical surface, a rotationally symmetric aspherical surface, or a surface optically completed as a progressive surface, and only the inner surface (surface on the eyeball side) is ground and polished. Eyeglass lenses that match the prescription are processed.

  By the way, the lens lens finally provided to the wearer needs to secure a certain thickness enough to be mounted on the spectacle frame, but the edge thickness is required to be as thin as possible from the point of view. It has been. When the prescription lens is a minus lens, the center of the lens is the thinnest part, and therefore the edge thickness of the target lens depends on how much the center thickness of the lens is secured. However, when the prescription lens is a plus lens, the edge thickness is thinner than the center thickness of the lens, so the edge thickness of the target lens depends on how much the edge thickness is secured in the grinding and polishing stages of the semi-finished lens. To do. On the other hand, when polishing the semi-finished lens, if the lens edge thickness becomes too thin, the polishing pad is easily damaged, and as a result, the life of the polishing pad is shortened. Therefore, in order to reduce the load on the polishing pad, a certain amount of lens edge thickness is secured. However, since the outer shape of the semi-finished lens is considerably larger than the outer shape of the target lens, there is a problem that the center thickness and the edge thickness of the final target lens become thicker.

  To cope with this problem, the semi-finished lens is processed into a circle or ellipse having a smaller diameter in accordance with the shape of the spectacle frame, and the intermediate lens (precursor lens) having this circle or ellipse is polished. It has been proposed to reduce the thickness of the spectacle lens while avoiding the thickness of the portion (see, for example, Patent Document 1).

JP 2012-168555 A

In an aspect of the present invention, an apparatus for generating the shape of a lens, the outer periphery of a region where a low melting point metal is provided when a semi-finished lens and a fixing jig are bonded with a low melting point metal, or a low melting point metal A first shape line that is an outer periphery of the region set to the outer periphery by the first predetermined width with respect to the provided region, and an outer periphery of the region that is set to the outer side by the second predetermined width with respect to the shape of the spectacle frame A lens shape generation device is provided that includes a shape generation unit that generates, as lens shape information, an outermost peripheral line obtained by combining the two based on a certain second shape line.
According to an aspect of the present invention, a spectacle lens manufacturing system includes a processing device that generates a lens and a lens shape generation device that supplies lens shape information to the processing device. The lens shape generation device is fixed to a semi-finished lens. It is the outer periphery of the region where the low melting point metal is provided when the jig is bonded to the jig with the low melting point metal, or the outer periphery of the region set to the outer periphery by the first predetermined width with respect to the region where the low melting point metal is provided Based on the first shape line and the second shape line that is the outer periphery of the region set outside the second predetermined width with respect to the shape of the spectacle frame, the outermost periphery obtained by combining both is used as lens shape information. A spectacle lens manufacturing system including a shape generation unit for generation is provided.
In an aspect of the present invention, there is provided a method for generating a lens shape, wherein an outer periphery of a region where a low melting point metal is provided when a semi-finished lens and a fixing jig are bonded with a low melting point metal, or a low melting point metal A first shape line that is an outer periphery of the region set to the outer periphery by the first predetermined width with respect to the provided region, and an outer periphery of the region that is set to the outer side by the second predetermined width with respect to the shape of the spectacle frame A lens shape generation method is provided that includes generating an outermost periphery obtained by combining both as the lens shape information based on a certain second shape line.
According to an aspect of the present invention, there is provided a spectacle lens manufacturing method including processing a semi-finished lens and generating the lens based on lens shape information, wherein the semi-finished lens and the fixing jig are bonded with a low melting point metal. In the shape of the spectacle frame and the first shape line that is the outer periphery of the region where the low melting point metal is provided or the outer periphery of the region set to the outer periphery by the first predetermined width with respect to the region where the low melting point metal is provided An eyeglass lens manufacturing method comprising: generating, based on a second shape line that is an outer periphery of a region set outside by a second predetermined width, as lens shape information, combining both of them as lens shape information Provided.
According to a first aspect of the present invention, there is provided an apparatus for generating a lens shape, the first shape line corresponding to the outer edge of a fixing jig attached to the first surface or the second surface of the semi-finished lens, A lens shape generation device is provided that includes a shape generation unit that generates, as lens shape information, an outermost peripheral line obtained by combining the two based on a second shape line corresponding to a shape.

  According to a second aspect of the present invention, there is provided a spectacle lens manufacturing system including a processing device that generates a lens and a lens shape generation device that supplies lens shape information to the processing device, wherein the lens shape generation device is a semi-finished lens. Based on the first shape line corresponding to the outer edge of the fixing jig attached to the first surface or the second surface of the lens and the second shape line corresponding to the shape of the spectacle frame, the outermost periphery obtained by combining the two is the lens. An eyeglass lens manufacturing system including a shape generation unit that generates shape information is provided.

  According to a third aspect of the present invention, there is provided a method for generating a lens shape, the first shape line corresponding to the outer edge of a fixing jig attached to the first surface or the second surface of the semi-finished lens, A lens shape generation method is provided that includes generating, as lens shape information, an outermost periphery obtained by combining the two based on a second shape line corresponding to the shape.

  According to a fourth aspect of the present invention, there is provided a spectacle lens manufacturing method including processing a semi-finished lens and generating the lens based on lens shape information, and the method is attached to the first surface or the second surface of the semi-finished lens. A spectacle lens including generating an outermost outer periphery obtained by combining the two as a lens shape information based on a first shape line corresponding to the outer edge of the fixing jig and a second shape line corresponding to the shape of the spectacle frame; A manufacturing method is provided.

  In the fifth aspect of the present invention, the first shape line corresponding to the outer edge of the fixing jig attached to the first surface or the second surface of the semi-finished lens, and the second shape line corresponding to the shape of the spectacle frame. Based on this, a lens is provided that is cut along the outermost periphery that combines the two.

It is a figure which shows the example of the shape in each step of the spectacles lens manufacturing process of embodiment. It is a block diagram which shows the example of the intermediate lens shape production | generation apparatus of embodiment. It is a figure which shows the example of a process of the shape generation part of embodiment. It is a figure which shows the example of a process of the shape generation part of embodiment. It is a figure which shows the example of the curving process of the curving process part of embodiment. It is a figure which shows the example of the correction process of the correction process part of embodiment. It is a figure which shows the example of the correction process of the correction process part of embodiment. It is a figure which shows the example of the intermediate lens shape produced | generated by the intermediate lens shape production | generation apparatus of embodiment. It is a flowchart which shows the example of the intermediate lens shape production | generation method of embodiment. It is a flowchart which shows the example of the intermediate lens shape production | generation method of embodiment. It is a flowchart which shows the example of the intermediate lens shape production | generation method of embodiment. It is a figure which shows the intermediate lens shape of 1st Example, and the intermediate lens shape of a comparative example. It is a figure which shows the intermediate lens shape of 2nd Example, and the intermediate lens shape of a comparative example. It is a block diagram showing an example of a spectacle lens manufacturing system of an embodiment.

  Embodiments of the present invention will be described below with reference to the drawings. However, the present invention is not limited to this. In the drawings, the scale is changed as appropriate, for example, by partially enlarging or emphasizing. Patent Document 1 described above creates a circular or elliptical intermediate lens from a semi-finished lens. The geometrical center of this circular or elliptical intermediate lens is usually set to coincide with the geometrical center of the semi-finished lens, and its outer shape is smaller than that of the semi-finished lens. There is a certain effect in reducing the thickness of the edges. For a circular or elliptical intermediate lens, a fixing jig is usually attached to the first or second surface of the semi-finished lens, and the surface opposite to the fixing jig mounting surface is adjusted to the prescription by a curve generator (CG). At the time of grinding, the outer shape is simultaneously cut into a circle or an ellipse. For this reason, the intermediate lens has to be set not only in a lens shape but also in an elliptical shape with a size encompassing the outer edge of the fixing jig, and there is a limit in reducing the edge thickness of the lens lens. Therefore, in this embodiment, an intermediate lens shape generation device capable of making a spectacle lens thinner than when processing a circular or elliptical intermediate lens while avoiding an increase in the burden of the polishing pad during polishing, An eyeglass lens manufacturing system, an intermediate lens shape generation method, an eyeglass lens manufacturing method, and an intermediate lens are provided.

  First, the intermediate lens according to the present embodiment will be described. The intermediate lens is a lens at an intermediate stage in the process of manufacturing the spectacle lens that is attached to the spectacle frame from the semi-finished lens. Drawing 1 is a figure showing an example of a shape in each manufacture process of a spectacles lens of an embodiment. Reference sign SF in FIG. 1A is a semi-finished lens, reference sign ML1 in FIG. 1B is an intermediate lens according to the embodiment, and reference sign EL in FIG. is there. In the following description, among the lenses, the object side surface is referred to as a first surface Sa, and the surface opposite to the first surface Sa (eyeball side) is referred to as a second surface Sb. The spectacle lens is, for example, a lens in which both the shape of the first surface Sa and the shape of the second surface Sb are processed into a shape according to a prescription value. The intermediate lens ML1 in FIG. 1B is a lens before at least one of the shape of the first surface Sa and the shape of the second surface Sb is processed into a shape according to the prescription value. The eyeglass lens EL in FIG. 1C is, for example, a lens whose outer shape is processed in accordance with the shape of the frame among the above-described eyeglass lenses.

  The semi-finished lens SF shown in FIG. 1A is sometimes called a lens blank or a lens block, and is formed, for example, by injecting a raw material monomer into a tempered glass matrix and polymerizing (curing) it. In the semi-finished lens SF, the first surface Sa on the object side is generally formed as a spherical surface having a predetermined curve, a rotationally symmetric aspheric surface, or a progressive surface (free curved surface), and the second surface on the other eyeball side. The surface Sb is processed into a shape according to the prescription value. The semi-finished lens SF may be one in which both the first surface Sa and the second surface Sb are processed (double-sided processing) into a shape according to the prescription value. The planar shape of the semifinished lens SF is circular in the example of FIG. 1A, but may be elliptical or other shapes. The semi-finished lens SF is affixed to the fixing jig TL via the low melting point alloy AM with respect to the first surface Sa completed as an optical surface (blocking step), and is transferred to a processing step. In the processing step, first, the second surface Sb of the semi-finished lens SF is ground by a curve generator (CG) and then polished in the polishing step to form an optical surface that satisfies the prescription.

  The intermediate lens ML1 shown in FIG. 1B is an intermediate stage lens in the process of manufacturing a spectacle lens (for example, the eyeglass lens EL in FIG. 1C) that is attached to the spectacle frame from the semi-finished lens SF. . Reference sign ML3 in FIG. 1B is an intermediate lens of a comparative example, and the planar shape is an elliptical shape. The intermediate lens ML3 of the comparative example is obtained, for example, by processing the outer periphery of the semi-finished lens SF with a curve generator (CG) used in the grinding process. That is, the semi-finished lens SF is subjected to grinding and outer periphery processing of the second surface by the same processing machine.

  The intermediate lens ML1 according to the embodiment has an outer shape in which an outer edge portion is cut along the outermost peripheral line OL. The outermost peripheral line OL is based on the first shape line AL corresponding to the outer edge of the fixing jig TL attached during grinding and outer peripheral processing of the optical surface, and the second shape line FL corresponding to the shape of the spectacle frame. It is a line combining both.

  In the eyeglass lens EL of FIG. 1C, for example, after the second surface Sb of the intermediate lens ML1 of FIG. 1B is processed according to a prescription value, a hard coat film, an antireflection film, or the like is appropriately used. After forming the lens, it is a lens that has been tumbled according to the shape of the frame. The eyeglass lens EL may be formed with a bevel, a two-point mounting hole or the like for mounting on the frame.

  By the way, in the case of a plus lens whose thickness becomes thinner toward the outer edge (edge, outer periphery), the outer edge of the lens may become a knife edge after grinding with a curve generator (CG). For example, the knife edge has an outer edge thickness ET of 0.2 mm or less, or 0.1 mm or less. When the polishing process is performed on the lens after grinding, if the outer edge is a knife edge, for example, the wear of the polishing member becomes severe, which may increase the manufacturing cost. Therefore, the grinding process by the curve generator (CG) is performed so as to ensure a certain thickness at the outer edge of the lens. Here, if the grinding process is performed with the outer diameter of the semi-finished lens SF without passing through the intermediate lens, it is necessary to ensure a certain thickness at the outer edge of all the outer shapes of 70 to 85φ. In addition, the center thickness of the lens becomes thick.

  When the elliptical intermediate lens ML3 of FIG. 1B is processed and then ground, the outer diameter is smaller than that of the semi-finished lens SF. In particular, since the diameter in the vertical direction is small, in the case of a prescription that minimizes the edge thickness of the lens in this direction, it is only necessary to secure the edge thickness with this reduced outer diameter, and as a result, the center thickness of the lens Can be thinned. The intermediate lens ML1 according to the embodiment has an outer shape cut along the outermost peripheral line OL that is a combination of the two based on the first shape line AL and the second shape line FL. The outer diameter can be further reduced compared to ML3. In particular, in FIG. 1B, the portions indicated by the region AR1, the region AR2, and the region AR3 are portions that can particularly reduce the outer diameter. The region AR1 is a portion on the nose side or ear side with respect to the intermediate lens ML1. The area AR2 and the area AR3 are forehead or chin side portions with respect to a portion where the second shape line FL (frame shape) protrudes from the first shape line AL (alloy outline). In the case of the prescription in which the edge thickness is minimized in this direction, a lens having a thinner central thickness can be obtained particularly effectively.

  Next, FIG. 2 is a block diagram illustrating an example of the intermediate lens shape generation device 1 according to the embodiment. The intermediate lens shape generation device 1 is a shape of the intermediate lens ML1 (intermediate lens shape ML1F) for manufacturing a spectacle lens (for example, the eyeglass lens EL of FIG. 1C) attached to the spectacle frame from the semi-finished lens SF. ) Is generated. The intermediate lens shape generation device 1 includes, for example, a shape generation unit 2, a curving processing unit 3, a correction processing unit 4, and a storage unit 5.

  FIG. 3 is a diagram illustrating an example of processing of the shape generation unit 2. Based on the first shape line AL and the second shape line FL, the shape generation unit 2 generates a primary generation curve OL1 (see FIG. 3B) that combines the two as intermediate lens shape information. The primary generation curve OL1 is one form of the outer circumference (outermost circumference line OL) of the intermediate lens ML1. The first shape line AL corresponds to the outer edge of the fixing jig TL (see FIG. 1B) attached to the first surface Sa or the second surface Sb of the semifinished lens SF. The fixing jig TL is attached to, for example, the surface opposite to the surface to be processed among the first surface Sa and the second surface Sb. The first shape line AL is, for example, a region where the low melting point metal AM is provided when the semi-finished lens SF and the fixing jig are bonded by a low melting point metal AM (eg, alloy) (hereinafter referred to as an alloy shape). It corresponds to the outer periphery of. The second shape line FL corresponds to the shape of the spectacle frame. The intermediate lens shape MLF includes, for example, a shape in which a frame shape (second shape line FL) and an alloy shape (first shape line AL) are overlapped on two-dimensional coordinates. Here, the intersection points of the first shape line AL and the second shape line FL are defined as an intersection point CP1 and an intersection point CP2. The primary generation curve OL1 includes a portion OL1a outside the second shape line FL between the intersection point CP1 and the intersection point CP2 in the first shape line AL. Further, the primary generation curve OL1 includes a portion OL1b outside the first shape line AL between the intersection point CP1 and the intersection point CP2 in the second shape line FL.

  The shape generation unit 2 generates information indicating the shape and dimensions of the outermost circumference line OL based on, for example, the fixture information and the spectacle frame information. The fixture information and the spectacle frame information are supplied from the outside of the intermediate lens shape generation device 1 (see FIG. 2) and stored in the storage unit 5, for example. The shape generation unit 2 reads the fixture information and the spectacle frame information from the storage unit 5 and generates information indicating the outermost circumference line OL.

  The fixture information includes, for example, the shape and dimensions of the fixture TL (see FIG. 1B). For example, the outer shape of the surface of the fixing jig TL bonded to the intermediate lens ML1 is circular. For example, the fixing jig TL is bonded to the intermediate lens ML1 with its center aligned with the center GC (geometric center) of the semi-finished lens SF in the intermediate lens ML1. The region where the alloy is provided in the intermediate lens ML1 is, for example, a circle concentric with the fixing jig TL, and the dimension thereof is determined according to the dimension of the fixing jig TL. For example, the shape generation unit 2 sets the outer periphery of the region where the alloy is provided to the first shape line AL. For example, the center of the first shape line AL is set at substantially the same position as the center GC of the semi-finished lens SF.

  The spectacle frame information includes, for example, the shape and dimensions of a frame to which the eyeglass spectacle lens EL (see FIG. 1C) corresponding to the intermediate lens ML is attached. The relative positions of the first shape line AL and the second shape line FL are determined according to prescription values such as an eye point (EP) position and a pupillary distance (PD), for example. The geometric center of the second shape line FL is deviated from, for example, the center of the first shape line AL (the center GC of the semifinished lens SF). For example, the shape generation unit 2 arranges the shape of the frame at a position corresponding to the prescription value, and sets the outer periphery to the second shape line FL.

  The shape generation unit 2 generates, as intermediate lens shape information, the outermost peripheral line OL obtained by combining both the first shape line AL and the second shape line FL as described above. For example, the shape generation unit 2 calculates an intersection point CP1 and an intersection point CP2 between the first shape line AL and the second shape line FL. For example, the shape generation unit 2 sets a portion OL1a outside the second shape line FL between the intersection CP1 and the intersection CP2 in the first shape line AL as a part of the primary generation curve OL1. In addition, for example, the shape generation unit 2 uses a portion OL1b outside the first shape line AL between the intersection CP1 and the intersection CP2 in the second shape line FL as a part of the primary generation curve OL1. . For example, the shape generation unit 2 represents the primary generation curve OL1 by at least one of a set of points and a mathematical formula, and stores the data in the storage unit 5. The intermediate lens shape generation device 1 may use a curve obtained by performing at least one of a curving process (described later) and a correction process (described later) on the primary generation curve as the outermost peripheral line OL.

  FIG. 4 is a diagram illustrating another example of the process of the shape generation unit 2. In FIG. 4A, the shape generation unit 2 sets the first shape line AL outside the region TLa where the alloy is provided by a predetermined width B1. A region Q1 between the region TLa where the alloy is provided and the first shape line AL is used, for example, as a margin in processing (polishing) described later. For example, when processing is performed with the fixing jig TL attached via an alloy, the alloy is not cut because the alloy is not provided in the portion corresponding to the region Q1. Thereby, for example, mixing of the alloy and grinding waste can be avoided, and the alloy can be easily reused. The predetermined width B1 is set, for example, in the range of 0.1 mm to 3.0 mm, preferably in the range of 0.5 mm to 2.0 mm. The set value of the predetermined width B1 is stored in the storage unit 5 (see FIG. 2), for example. For example, the shape generation unit 2 reads the set value of the predetermined width B1 and the fixture information from the storage unit 5, and sets the first shape line AL. The predetermined width B1 may be uniform in the circumferential direction of the fixing jig TL, or may vary depending on the circumferential position of the fixing jig TL.

  In FIG. 4B, the shape generation unit 2 sets a second shape line FL outside the spectacle frame shape FRa by a predetermined width B2. A region Q2 between the shape FRa of the spectacle frame and the second shape line FL is used as a margin taking into account dripping during a coating process such as an antireflection film or a hard coat. The predetermined width B2 is set, for example, in the range of 0.1 mm to 3.0 mm, preferably in the range of 0.5 mm to 2.0 mm. The setting value of the predetermined width B2 is stored in, for example, the storage unit 5 (see FIG. 2), and the shape generation unit 2 reads the setting value of the predetermined width B2 and the spectacle frame information from the storage unit 5 to obtain the second shape. Set the line FL. For example, the shape generation unit 2 generates information on the outermost circumference line OL based on the first shape line AL set in the process of FIG. 4A and the second shape line FL set in FIG. 4B. . The predetermined width B2 may be uniform in the circumferential direction of the shape of the spectacle frame, or may be changed according to the position in the circumferential direction of the shape of the spectacle frame.

  FIG. 5 is a diagram illustrating an example of the curving process by the curving process unit 3. As shown in FIG. 5A, the primary generation curve OL1 generated by the shape generation unit 2 is an intersection of the first shape line AL (see FIG. 3) and the second shape line (intersection CP1, intersection CP2). ) Becomes a corner. As shown in FIG. 5B, the curving processing unit 3 curbs C1 (in the vicinity of the intersection CP1 and the intersection CP2) included in the primary generation curve OL1 to generate a secondary generation curve OL2 (curved outermost circumference line). ) Is generated. For example, the intermediate lens shape MLF is a shape having a smooth curve with rounded corners on the outer periphery so that the polishing pad is not damaged during polishing. For example, the curving processing unit 3 removes a predetermined range in the vicinity of the intersection CP1 and the intersection CP2 from the primary generation curve OL1, and performs a spline interpolation on the range from the surrounding information to obtain a corner portion (intersection CP1). , In the vicinity of the intersection CP2). The width of the predetermined range is stored in the storage unit 5 (see FIG. 2) as a set value, for example. The curving processing unit 3 reads, for example, a set value of a predetermined range from the storage unit 5, and uses this set value and the coordinates of the intersection point CP 1 and the coordinates of the intersection point CP 2 calculated by the shape generation unit 2. The corner of the next generation curve OL1 is curved. The curving process unit 3 represents, for example, a quadratic generation curve OL2 (curved outermost circumference line) generated by curving, at least one of a set of points and a mathematical expression, and stores the data in the storage unit 5.

  6 and 7 are diagrams illustrating an example of correction processing by the correction processing unit 4. As shown in FIG. 6A, the correction processing unit 4 sets a plurality of points PT on the secondary generation curve OL2. For example, the correction processing unit 4 sets a plurality of lines RL (radiation direction lines) extending in the radial direction from the center GC of the semifinished lens SF at a predetermined angular interval Δθ. The predetermined angle interval Δθ is set, for example, in the range of 0.5 ° to 5.0 °, preferably in the range of 1.0 ° to 4.0 °. The predetermined angle interval Δθ may be managed in association with the product type on the database, for example. This database may be stored in the storage unit 5 or may be stored in a storage device accessible by the intermediate lens shape generation device 1.

  For example, the correction processing unit 4 calculates intersections between each of the plurality of lines RL and the secondary generation curve OL2, and sets these intersections as a plurality of points PT. The number of the plurality of points PT is arbitrary. For example, when the predetermined angle interval Δθ is 2.5 °, the number of points PT is 144 (360 ° / 2.5 °). For example, the correction processing unit 4 smoothly connects at least a part of the plurality of points PT by interpolation and corrects the secondary generation curve OL2 (curved outermost peripheral line). For example, the correction processing unit 4 selects a point group including three or more adjacent points from a plurality of points PT, and a curve (eg, Bezier curve, B-spline curve) is obtained as a correction curve. For example, the correction processing unit 4 firstly corrects the secondary generation curve OL2 by selecting a point group in order from a plurality of points PT and connecting correction curves corresponding to the point groups.

  As shown in FIG. 6B, depending on the interpolation method used in the primary correction, the curve OL3a after the primary correction is inside the shape of the eyeglass frame (eg, the second shape line FL, the secondary generation curve OL2). Placed in. For example, the correction processing unit 4 performs the secondary correction so that the curve OL3a after the primary correction is outside the primary generation curve OL1. For example, as illustrated in FIG. 7A, the correction processing unit 4 extracts three adjacent points (point a, point b, and point c) from the curve OL3a after the primary correction. The correction processing unit 4 includes an intersection (point) between a line L1 connecting the points a and c at both ends of the three points, and a line L2 passing through the center GC of the semi-finished lens SF among the three points b. P) is calculated. The correction processing unit 4 determines whether or not the point b is on the side closer to the center GC with respect to the line L1.

  As shown in FIG. 7A, when the point b is on the far side from the center GC with respect to the line L1, the correction processing unit 4 employs the point b as a point on the curve after the secondary correction. As shown in FIG. 7B, when the point b is on the side closer to the center GC with respect to the line L1, the correction processing unit 4 moves the position of the point b to the outside with respect to the center GC. For example, the correction processing unit 4 moves the point b when the distance L between the point b and the point P is greater than or equal to a threshold value (more than a predetermined length). The amount by which the point b is moved may be determined in advance, such as 1 mm. Further, for example, the correction processing unit 4 may correct the position of the point b by replacing the point b with the point P, or may adopt the point P as a point on the curve after the secondary correction.

  For example, the correction processing unit 4 performs the above-described primary correction and secondary correction again on the curve after the secondary correction. For example, in the state of FIG. 7B, the correction processing unit 4 repeatedly performs the primary correction and the secondary correction until the distance L between the point P and the point b is equal to or less than the threshold value. This threshold value (predetermined length) is set, for example, in the range of 0 mm to 0.5 mm. This threshold value may be managed in association with the product type on the database, for example. This database may be stored in the storage unit 5 or may be stored in a storage device accessible by the intermediate lens shape generation device 1. The correction processing unit 4 represents, for example, a curve obtained by the primary correction and the secondary correction at least one of a point group and a mathematical expression, and represents the data as a tertiary generation curve (curved outermost peripheral line after correction). Information is stored in the storage unit 5 (see FIG. 2).

  FIG. 8 is a diagram illustrating an example of the intermediate lens shape MLF generated by the intermediate lens shape generation device 1. The intermediate lens shape MLF is based on the first shape line AL corresponding to the outer edge of the fixing jig TL (see FIG. 1B) and the second shape line FL corresponding to the shape of the spectacle frame. This is a shape excluding the outer edge of the semi-finished lens SF along the combined outermost peripheral line OL. In the present embodiment, the intermediate lens shape generation device 1 employs a tertiary generation curve generated by the correction processing described with reference to FIGS. 6 and 7 as the outermost peripheral line OL. The outermost peripheral line OL may be the primary generation curve OL1 shown in FIG. 3B or the secondary generation curve OL2 shown in FIG. 5B.

  Returning to the description of FIG. 2, the intermediate lens shape generation device 1 includes a storage unit 5 that stores various types of information. The storage unit 5 may be, for example, a mass storage device such as a hard disk, or a non-volatile memory such as a USB memory. The intermediate lens shape generation device 1 includes, for example, a computer system. For example, the intermediate lens shape generation device 1 reads a program stored in the storage unit 5 and executes various processes according to the program. This program includes an intermediate lens shape generation program for causing a computer to generate an intermediate lens shape for manufacturing a spectacle lens attached to the spectacle frame from the semi-finished lens SF. The intermediate lens shape generation program corresponds to the first shape line AL corresponding to the outer edge of the fixing jig TL attached to the first surface Sa or the second surface Sb of the semifinished lens SF and the shape of the spectacle frame. Based on the second shape line FL to be generated, the outermost periphery OL that combines both is generated as intermediate lens shape information. This program may be provided by being recorded on a computer-readable storage medium.

  The intermediate lens shape generation device 1 is provided with, for example, an input device 11 and a display device 12. The input device 11 receives input of information from a user, for example, and supplies the input information to the intermediate lens shape generation device 1. The input device 11 includes, for example, at least one of a keyboard, a mouse, a touch panel, a touch pen, and a LAN board (communication device). The input device 11 is connected to the intermediate lens shape generation device 1, and supplies information input to the own device (input device 11) to the intermediate lens shape generation device 1. For example, the fixture information and the spectacle frame information are supplied to the intermediate lens shape generation device 1 via the input device 11. In addition, the user can input various setting values to the intermediate lens shape generation device 1 via the input device 11. Further, the user can input various commands to the intermediate lens shape generation device 1 via the input device 11. The intermediate lens shape generation device 1 stores information supplied from the input device 11 in the storage unit 5.

  The display device 12 includes, for example, a liquid crystal display or a touch panel display, and is connected to the intermediate lens shape generation device 1. For example, the display device 12 displays an image based on image data supplied from the intermediate lens shape generation device 1. For example, the intermediate lens shape generation device 1 supplies image data indicating the generated intermediate lens shape to the display device 12, and the display device 12 displays this image. Further, for example, the intermediate lens shape generation device 1 supplies image data indicating various conditions (for example, set values) for generating the intermediate lens shape to the display device 12, and the display device 12 displays this image. For example, the user can change the condition via the input device 11 while viewing various conditions for generating the intermediate lens shape displayed on the display device 12.

  Note that the correction processing unit 4 does not have to correct a part of the secondary generation curve OL2 and correct the secondary generation curve OL2 outside this section. For example, the correction processing unit 4 may set only a section where the secondary generation curve OL2 deviates from the first shape line AL as a correction target. Note that the intermediate lens shape generation device 1 may not include at least one of the curving processing unit 3 and the correction processing unit 4.

  Next, based on the operation of the intermediate lens shape generation device 1 described above, an intermediate lens shape generation method according to the embodiment will be described. FIG. 9 is a flowchart illustrating an example of the intermediate lens shape generation method according to the embodiment. In step S <b> 1, the intermediate lens shape generation device 1 acquires information on a fixing jig (fixing jig information). For example, the intermediate lens shape generation device 1 stores the acquired fixing jig information in the storage unit 5. In step S2, the intermediate lens shape generation device 1 acquires spectacle frame information. For example, the intermediate lens shape generation device 1 stores the acquired spectacle frame information in the storage unit 5. The intermediate lens shape generation device 1 may perform either step S1 or step S2 first.

  In step S3, the intermediate lens shape generation device 1 creates a first shape line AL from the fixture information. For example, the shape generation unit 2 reads the fixture information from the storage unit 5 and creates the first shape line AL. In step S4, the intermediate lens shape generation device 1 creates the second shape line FL from the spectacle frame information. For example, the shape generation unit 2 reads the spectacle frame information from the storage unit 5 and creates the second shape line FL. Note that the intermediate lens shape generation device 1 may perform either step S3 or step S4 first.

  In step S5, the intermediate lens shape generation device 1 extracts the outermost circumference line OL by combining the first shape line AL and the second shape line FL. For example, the shape generation unit 2 arranges the first shape line AL and the second shape line FL at relative positions according to the prescription values (see FIG. 3A). For example, the shape generation unit 2 calculates the intersection point CP1 and the intersection point CP2 between the arranged first shape line AL and the second shape line FL. For example, in the section between the intersection point CP1 and the intersection point CP2, the shape generation unit 2 determines the one that is arranged outside of the first shape line AL and the second shape line FL as the primary generation curve OL1 (eg, outermost periphery). Line OL). The outermost peripheral line OL may be the primary generation curve OL1 shown in FIG. 3B or the secondary generation curve OL2 shown in FIG. 5B. In step S6, the intermediate lens shape generation device 1 generates intermediate lens shape information. For example, the intermediate lens shape generation device 1 generates, as the intermediate lens shape information, data representing the shape and dimensions of the outermost peripheral line OL on two-dimensional coordinates.

  FIGS. 10A and 10B are flowcharts showing another example of the intermediate lens shape generation method. In FIG. 10A, the intermediate lens shape generation device 1 sets the first shape line AL outward from the outer edge of the fixing jig TL (see FIG. 1B) by a predetermined width B1 in step S10 following step S2. (See FIG. 4A). For example, the shape generation unit 2 reads the fixing jig information acquired in step S1 and the set value of the predetermined width B1 from the storage unit 5, and generates the first shape line AL. 10B, in step S11 following step S3, the intermediate lens shape generation device 1 generates a second shape line FL outward from the shape (inner edge) of the spectacle frame by a predetermined width B2 (FIG. 4B). )reference). For example, the shape generation unit 2 reads the spectacle frame information acquired in step S2 and the set value of the predetermined width B2 from the storage unit 5, and generates the second shape line FL. The intermediate lens shape generation device 1 executes the process of step S10 of FIG. 10A instead of step S3, and executes the process of step S11 of FIG. 10B instead of step S4. Also good. For example, the intermediate lens shape generation device 1 may execute the process of step S10 following the process of step S2, then execute the process of step S11, and then execute the process of step S5.

  FIG. 11 is a flowchart illustrating another example of the intermediate lens shape generation method. In step S20 following step S5, the intermediate lens shape generation device 1 performs a curving process for curving the angle of the primary generation curve OL1 (see FIG. 5A). For example, the curving unit 3 in the primary generation curve OL1 (see FIG. 5A) corresponds to the intersection (intersection CP1, intersection CP2) of the first shape line AL and the second shape line FL ( The corner portion C1) is curved by an interpolation method such as spline interpolation to generate a secondary generation curve OL2.

  Further, in the processing of step S21 to step S23, the intermediate lens shape generation device 1 performs correction processing on the secondary generation curve OL2. For example, in step S21, the correction processing unit 4 sets a plurality of points PT (see FIG. 6A) on the secondary generation curve OL2. In step S22, the correction processing unit 4 sequentially selects a point group including three or more points from the plurality of points PT, and generates a curve (eg, Bezier curve) using the selected points (primary). correction). In step S23, the correction processing unit 4 determines whether or not the curve after the primary correction generated in step S22 is inside the shape of the spectacle frame (eg, the second shape line FL, the second generation curve OL2). When the curve after the primary correction falls within the shape of the spectacle frame, the curve is corrected outward (see FIG. 7B).

[Example]
Next, specific examples of the present invention will be described. FIG. 12 is a diagram illustrating the intermediate lens ML1a of the first example, the intermediate lens ML2a of the comparative example, and the intermediate lens ML3a. In this example, when the progressive focus lens is manufactured by grinding and polishing the inner surface of the semi-finished lens having the outer surface (object side surface) as a progressive surface, the intermediate lens ML1a is applied by applying the above-described embodiment. To get.

  Table 1 below is a table showing the prescription of the target lens. In this embodiment, the spherical power is +4.50, the astigmatic power is -4.00, the axial power is 40, the addition power is 3.50, and the progressive zone length is 14 mm. The unit of spherical power, astigmatism power, and addition power is diopter (DP) (the same applies hereinafter). The unit of axial degree is deg (the same applies hereinafter).

  Table 2 below is a table showing specifications of the semi-finished lens. In this example, the refractive index of the semi-finished lens is 1.67, the outer diameter is 78 mm, the outer surface curve of the distance portion is 6.5, and the outer diameter of the alloy bonded portion is 50 mm. The unit of the outer surface curve for distance use is diopter (the same applies hereinafter).

  Table 3 below is a table showing frame information. In this embodiment, the horizontal width of the frame is 48.66 mm, the vertical width is 30.43 mm, the distance between the pupils is 35 mm, the position of the eye point is 19.01 mm, and the frame PD is 65.8 mm.

  Table 4 below is a table showing parameters used for determining the intermediate lens shape. In this embodiment, the predetermined width B1 (see FIG. 4A) is 0.5 mm, the predetermined width B2 (see FIG. 4B) is 2.0 mm, and the predetermined angle interval (see FIG. 6A) is The degree of correction is 2.5 degrees, the type of correction curve is a Bezier curve, and the threshold value for secondary correction (see FIG. 7) is 0.01 mm.

  In FIG. 12, reference symbol FLa indicates the target lens shape and position in the first embodiment, and ML1a indicates the intermediate lens shape and position calculated in the present embodiment. In the intermediate lens shape ML1a, the point where the edge thickness is the smallest was P1a. At this point P1a, when the semi-finished lens SF was ground and polished so as to ensure a minimum edge thickness of 0.2 mm, the center thickness of the obtained lens was 3.3 mm. The intermediate lens shape ML2a of the comparative example has a circular shape (perfect circle shape). The parameters for determining the shape of the intermediate lens shape ML2a are the same as in the embodiment, and the predetermined width B1 is 0.5 mm and the predetermined width B2 is 2.0 mm. The diameter of the circle calculated under these conditions was 62.7 mm. In the intermediate lens shape ML2a, the point with the smallest edge thickness is P2a. At this point P2a, when the semi-finished lens SF was ground and polished so as to ensure a minimum edge thickness of 0.2 mm, the center thickness of the obtained lens was 4.9 mm. The intermediate lens shape ML3a of the comparative example is an elliptical shape. The parameters for determining the shape of the intermediate lens shape ML3a are the same as in the embodiment, and the predetermined width B1 is 0.5 mm and the predetermined width B2 is 2.0 mm. The major axis of the ellipse calculated under these conditions was 64.0 mm, and the minor axis was 52.0 mm. In the intermediate lens shape ML3a, the point where the edge thickness is the smallest was P3a. At this point P3a, when the semi-finished lens was ground and polished so as to ensure a minimum edge thickness of 0.2 mm, the center thickness of the obtained lens was 3.9 mm. As described above, according to the first example to which the above-described embodiment is applied, the center thickness of the lens is reduced as compared with the case where the perfect intermediate lens shape ML2a or the elliptical intermediate lens shape ML3a is adopted. Can be reduced.

  FIG. 13 is a diagram illustrating the intermediate lens ML1b of the second example, the intermediate lens ML2b of the comparative example, and the intermediate lens ML3b. In this example, when the progressive focus lens is manufactured by grinding and polishing the inner surface of the semi-finished lens having the outer surface (object-side surface) as a progressive surface, the intermediate lens ML1b is applied by applying the above-described embodiment. To get.

  Table 5 below is a table showing the prescription of the target lens. In this embodiment, the spherical power is +4.50, the astigmatic power is -2.00, the axial power is 0, the addition power is 3.50, and the progressive zone length is 14 mm.

  Table 6 below is a table showing specifications of the semi-finished lens. In this example, the refractive index of the semi-finished lens is 1.60, the outer diameter is 78 mm, the outer surface curve of the distance portion is 5.5, and the outer diameter of the alloy bonded portion is 50 mm.

  Table 7 below is a table showing frame information. In this embodiment, the horizontal width of the frame is 47.81 mm, the vertical width is 54.19 mm, the inter-pupil distance is 30 mm, the position of the eye point is 31.19 mm, and the frame PD is 72.0 mm.

  Table 8 below is a table showing parameters used for determining the intermediate lens shape. In this embodiment, the predetermined width B1 (see FIG. 4A) is 0.5 mm, the predetermined width B2 (see FIG. 4B) is 2.0 mm, and the predetermined angle interval (see FIG. 6A) is The degree of correction is 2.5 degrees, the type of correction curve is a Bezier curve, and the threshold value for secondary correction (see FIG. 7) is 0.01 mm.

  In FIG. 13, symbol FLb indicates the target lens shape and position in the second embodiment, and ML1b indicates the intermediate lens shape and position calculated in the present embodiment. In the intermediate lens shape ML1b, the point with the smallest edge thickness was P1b. At this point P1b, when the semi-finished lens SF was ground and polished so as to ensure a minimum edge thickness of 0.2 mm, the center thickness of the obtained lens was 4.5 mm. The intermediate lens shape ML2b of the comparative example has a circular shape (perfect circle shape). The parameters for determining the shape of the intermediate lens shape ML2b are the same as in the embodiment, and the predetermined width B1 is 0.5 mm and the predetermined width B2 is 2.0 mm. The diameter of the circle calculated under these conditions was 70.7 mm. In the intermediate lens shape ML2b, the point with the smallest edge thickness is P2b. At this point P2b, when the semi-finished lens SF was ground and polished so as to ensure a minimum edge thickness of 0.2 mm, the center thickness of the obtained lens was 6.7 mm. The intermediate lens shape ML3b of the comparative example is an elliptical shape. The parameters for determining the shape of the intermediate lens shape ML3b are the same as in the embodiment, and the predetermined width B1 is 0.5 mm and the predetermined width B2 is 2.0 mm. The major axis of the ellipse calculated under these conditions was 75.0 mm, and the minor axis was 66.0 mm. In the intermediate lens shape ML3b, the point with the smallest edge thickness is P3b. At this point P3a, when the semi-finished lens was ground and polished so as to ensure a minimum edge thickness of 0.2 mm, the center thickness of the obtained lens was 6.9 mm. As described above, according to the second example to which the above-described embodiment is applied, the center thickness of the lens is reduced as compared with the case where the perfect circular intermediate lens shape ML2b or the elliptical intermediate lens shape ML3b is adopted. Can be reduced.

  Next, the eyeglass manufacturing system according to the embodiment will be described. FIG. 14 is a block diagram illustrating an example of a spectacle lens manufacturing system according to the embodiment. The eyeglass lens manufacturing system 20 manufactures a cut eyeglass lens EL having a lens shape corresponding to the eyeglass frame, for example. Note that the eyeglass lens EL may be a progressive addition lens or another type of eyeglass lens, for example, a single focus lens. The eyeglass lens manufacturing system 20 is used when an eyeglass lens EL is ordered from an orderer such as an eyeglass dealer to an ordering party such as an eyeglass lens manufacturer.

  The spectacle lens manufacturing system 20 includes an ordering computer (external input device) 21, a management server 22, an order receiving computer 23, a processing data control computer 24, a processing device M1, and a target lens processing device M2. . For example, the ordering computer 21 is installed on the orderer side, and the management server 22, the order receiving computer 23, and the target lens processing apparatus M2 are installed on the orderer side. Note that the target lens shape processing apparatus M2 may be installed on the orderer side when an orderer such as an eyeglass dealer performs target lens processing. For example, the eyeglass lens manufacturing system 20 may not include the target lens shape processing device M2.

  The order-side computer 21, the management server 22, and the order-receiving computer 23 each communicate with an arithmetic processing device such as a CPU (Central Processing Unit) and a storage device such as a main storage device and an auxiliary storage device for transmitting and receiving electronic information. Interface. The communication interface may be either a wired system or a wireless system.

  The ordering computer 21 may be, for example, a desktop or notebook personal computer, a tablet portable terminal, or the like. The ordering computer 21 is connected to the management server 22 via a network NW such as the Internet. In FIG. 12, the ordering computer 21 is connected to one network NW, but a plurality of ordering computers 21 may be connected to the network NW. As this network NW, for example, a communication line network such as an intranet or a LAN (Local Area Network) can be used in addition to the Internet. The ordering computer 21 transmits the fitting information of the wearer, information about the spectacle frame shape (frame placement information), other prescription information of the wearer, and the like to the management server 22 via the network NW. For example, the prescription information (prescription value) of the wearer includes power (spherical power, S degree), astigmatism power (C degree), axial degree (angle of the astigmatic axis), addition power, and prism. Further, the prescription information may include information on the distance between the pupils of the wearer and information on the pupil position (eye point) in the vertical direction (vertical direction) of the wearer with respect to the frame. The prescription information is acquired for each of the right eye and the left eye.

  A display device 25 and an input device 26 are connected to the ordering computer 21. The display device 25 includes a calculation result in the ordering computer 21, an execution result of an application stored in the ordering computer 21, information input by the input device 26, information received by the ordering computer 21 via the network NW, and the like. Is displayed. For example, a liquid crystal display is used as the display device 25. The input device 26 is used, for example, for inputting prescription information, frame placement information, and the like of the wearer. As the input device 26, for example, a keyboard or a mouse is used. As the input device 26, for example, a touch panel formed on the display device 25 may be used.

  The management server 22 is connected to the ordering computer 21 via the network NW as described above, and is also connected to the order receiving computer 23. A configuration in which a plurality of management servers 22 are connected to the network NW may be used. In this case, some management servers 22 may be used for backup.

  The order-receiving computer 23 receives information transmitted from the management server 22 and transmits the information to the machining data control computer 24. The processing data control computer 24 receives information transmitted from the order-receiving computer 23 and generates spectacle lens design information based on the information. Note that a plurality of order-receiving computers 23 and machining data control computers 24 may be provided. Further, the order-receiving computer 23 and the machining data control computer 24 may be configured by a single computer. That is, one computer may have the function of the order-receiving computer 23 and the function of the machining data control computer 24.

  The processing data control computer 24 includes the intermediate lens shape generation device 1. The intermediate lens shape generation device 1 includes a shape generation unit 2 as illustrated in FIG. Based on the first shape line AL corresponding to the outer edge of the fixing jig TL and the second shape line FL corresponding to the shape of the spectacle frame, the shape generation unit 2 intermediates the outermost peripheral line OL that is a combination of both. Generated as lens shape information. The intermediate lens shape generation device 1 supplies intermediate lens shape information to the processing device M1.

  The processing device M1 processes the semi-finished lens SF based on the intermediate lens shape information supplied from the intermediate lens shape generation device 1 to produce the spectacle lens EL that is attached to the spectacle frame (FIG. 1). (See (B)). For example, the processing device M1 cuts the outer periphery of the semi-finished lens SF based on the intermediate lens shape information to generate the intermediate lens ML1. The processing apparatus M1 performs the polishing process after generating the intermediate lens ML1. The processing device M1 polishes the intermediate lens ML1 on at least one of the shape of the first surface Sa and the shape of the second surface Sb (the shape of the optical surface), and the shape is determined according to the prescription value. Process into shape. In the intermediate lens ML1, at least one of the shape of the first surface Sa and the shape of the second surface Sb is processed by polishing treatment, and the shape of the first surface Sa and the shape of the second surface Sb (shape of the optical surface) are prescription values. Depending on the shape. The apparatus that performs the above-described polishing process may be provided separately from the processing apparatus M1. The target lens shape processing apparatus M2 processes the intermediate lens ML having a predetermined optical surface shape into a spectacle frame shape. The intermediate lens ML may be subjected to a coating process such as hard coating or antireflection before or after being processed by the target lens shape processing apparatus M2.

  According to the aspect of the present invention, the spectacle lens can be made thin while avoiding an increase in the load on the polishing pad during polishing. Although the embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the above-described embodiments, and appropriate modifications can be made without departing from the spirit of the present invention. One or more of the requirements described in the above embodiments and the like may be omitted. In addition, the requirements described in the above-described embodiments and the like can be combined as appropriate. In addition, as long as it is permitted by law, the disclosure of Japanese Patent Application No. 2015-154186 and all the references cited in the above-described embodiments and the like are incorporated as part of the description of the text.

DESCRIPTION OF SYMBOLS 1 ... Intermediate lens shape production | generation apparatus, 2 ... Shape production | generation part, 3 ... Curving process part, 4 ... Correction process part, 20 ... Eyeglass lens manufacturing system, AL ... 1st Shape line, FL: second shape line, SF: semi-finished lens, M1 ... processing device, M2 ... target lens processing device, ML ... intermediate lens, OL ... outermost circumference line , OL1 ... primary generation curve (outermost line), OL2 ... secondary generation curve (outermost line)

Claims (14)

An apparatus for generating a lens shape,
When the semi-finished lens and the fixing jig are bonded to each other with a low melting point metal, the outer periphery of the region where the low melting point metal is provided or the outer periphery of the region where the low melting point metal is provided is set by the first predetermined width. a first shape line which is the outer periphery of the region, on the basis of the second shape line which is the outer circumference of the area set outward by a second predetermined width for the shape of the spectacle frame, in, combination of both top A lens shape generation apparatus including a shape generation unit that generates an outer peripheral line as lens shape information.   The lens shape generation device according to claim 1, wherein the first predetermined width is set in a range of 0.1 mm to 3.0 mm. Said second predetermined width is set to 3.0mm or less in the range of 0.1 mm, the lens shape generation apparatus according to claim 1 or claim 2. The lens shape generation device according to any one of claims 1 to 3 , further comprising a curving unit that curves a corner portion included in the outermost peripheral line to generate a curved outermost peripheral line. The lens according to claim 4 , further comprising: a correction processing unit that corrects the curved outermost peripheral line to be outside the outermost peripheral line when the curved outermost peripheral line enters inside the outermost peripheral line. Shape generator. The correction processing unit extracts three adjacent points among a plurality of points set on the curved outermost peripheral line, and a line connecting both ends of the three points and an intermediate point among the three points. When the intermediate point is inside a predetermined length with respect to the intersection of the point and the line passing through the center of the semi-finished lens, the intermediate point is replaced with the intersection and the curved outermost peripheral line The lens shape generation device according to claim 5 , wherein The lens shape generation device according to claim 6 , wherein the predetermined length is set in a range of 0 mm to 0.5 mm. The lens shape according to claim 6 or 7 , wherein the plurality of points are intersection points of a plurality of radial lines and the curved outermost peripheral line at predetermined angular intervals from a center of the semi-finished lens. Generator. The lens shape generation device according to claim 8 , wherein the predetermined angle is set in a range of 0.5 ° to 5.0 °. The lens shape generation device according to any one of claims 1 to 9 , wherein the lens is an intermediate lens for manufacturing a spectacle lens attached to the spectacle frame from the semi-finished lens. A processing device for generating a lens;
A spectacle lens manufacturing system including a lens shape generation device that supplies lens shape information to the processing device,
The lens shape generation device is configured such that when the semi-finished lens and the fixing jig are bonded with a low melting point metal, the outer periphery of the region where the low melting point metal is provided or the region where the low melting point metal is provided is first. the basis of the first shape line which is the outer circumference of the area set on the outer periphery by a predetermined width, and a second shape line which is the outer circumference of the area set outward by a second predetermined width for the shape of the spectacle frame, the An eyeglass lens manufacturing system including a shape generation unit that generates the outermost periphery that combines the two as lens shape information. The spectacle lens manufacturing system according to claim 11 , comprising a target lens shape processing device that processes the lens generated by the processing device into the shape of the spectacle frame. A method of generating a lens shape,
When the semi-finished lens and the fixing jig are bonded to each other with a low melting point metal, the outer periphery of the region where the low melting point metal is provided or the outer periphery of the region where the low melting point metal is provided is set by the first predetermined width. a first shape line which is the outer periphery of the region, on the basis of the second shape line which is the outer circumference of the area set outward by a second predetermined width for the shape of the spectacle frame, in, combination of both top A lens shape generation method including generating an outer periphery as lens shape information. A spectacle lens manufacturing method comprising processing a semi-finished lens and generating the lens according to lens shape information,
When the semi-finished lens and the fixing jig are bonded with a low melting point metal, the outer periphery of the region where the low melting point metal is provided or the outer periphery of the region where the low melting point metal is provided by a first predetermined width is set. a first shape line which is the outer periphery of the region, and the second shape line which is the outer circumference of the area set outward by a second predetermined width for the shape of the spectacle frame, on the basis of, a combination of both A method for manufacturing a spectacle lens, comprising generating an outermost periphery as lens shape information.

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