JPH09108174A - Optical component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an inexpensively optical component with which optical elements are formable with good accuracy and optical performance is good. SOLUTION: A supporting part 19 is formed by a primary molding stage of two-color molding by which a black PMMA (methacrylic resin) is injected into the primary cavity formed by a male metal mold and a primary female metal mold. Next, a secondary female metal mold is set in place of the primary female metal mold on the male metal mold. The transparent PMMA is injected into the secondary cavity formed by the male metal mold, the supporting part 19 and the secondary female metal mold. A front end lens 18 is thus formed by the secondary molding stage of the two-color molding. Since the supporting part 19 is optically opaque, the incident of the unnecessary light on the front end lens 18 from the outer peripheral part of the front end lens 18 is prevent and the occurrence of troubles, such as flares and ghosts, in the image to be observed is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical component, more specifically, an optical element such as a lens arranged in a photographing optical system of a camera or a video camera, an observation optical system of an endoscope, and the like, and supports the optical element. The present invention relates to an optical component characterized by a portion integrally formed with a member adjacent to an optical element such as a support member.

[0002]

2. Description of the Related Art In a conventional optical component, an optical element such as a lens and a supporting portion of this optical element are separately manufactured,
Since the optical components were manufactured by assembling these, the manufacturing cost increases due to the assembly process, and the optical performance deteriorates due to the mounting error between the optical element and the support member during the assembly process. There was a problem.

As means for solving these problems, for example, in Japanese Patent Laid-Open No. 7-63968, an optical element portion formed of a resin material by two-color molding and a resin material formed integrally with the optical element at the same time are formed. And an optical component formed by the supporting portion of the optical element and a manufacturing method thereof are disclosed.

Further, the present applicant has filed Japanese Patent Application No. 6-269168.
The lens having a lens cover portion formed of a resin material, which is an optical element, and a light blocking member for optically blocking the observation window and the illumination window from the tip of the insertion portion of the endoscope device. It has been proposed to integrally form a tip constituent member formed of a resin material adjacent to the cover portion by insert molding, two-color molding or the like.

[0005]

However, in the above-mentioned prior art, no consideration is given to the order of molding of the optical element portion and the supporting portion for supporting the optical element portion and a member adjacent to the optical element portion such as a light shielding member. However, if the support portion and the light blocking member are molded after the optical element portion is first molded, the resin forming the optical element portion may be altered or the optical element portion may be deteriorated by the injection pressure or heat during molding. There is a problem that the optical element portion may be distorted due to deformation or contraction due to cooling of the support portion after molding, which deteriorates optical performance.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an inexpensive optical component which can form an optical element with high precision and has good optical performance.

[0007]

The optical component of the present invention is an optical component in which an optical element portion made of resin and an adjoining member made of resin adjacent to the optical element portion are integrally formed. , The adjacent member is primarily molded, and the optical element portion is secondarily molded by insert molding using the adjacent member as an insert so that the optical element portion and the adjacent member are integrally formed.

In the optical component of the present invention, the adjacent member is primarily molded, and the optical element portion is secondarily molded by insert molding using the adjacent member as an insert to form the optical element portion and the adjacent member. By integrally forming the optical element, the optical element can be accurately formed, and an inexpensive optical component having good optical performance can be realized.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings.

1 to 5 relate to a first embodiment of the present invention, FIG. 1 is a block diagram showing a configuration of an endoscope apparatus provided with an endoscope having an optical component, and FIG. 2 is FIG. 3 is a cross-sectional view showing a cross section in the insertion axis direction of the distal end portion of the endoscope of FIG.
4 is a block diagram showing the configuration of the optical component of FIG. 2, FIG.
Describes a method of manufacturing the optical component of FIG.
And FIG. 5 is a second explanatory diagram for explaining the manufacturing method of the optical component of FIG.

(Structure) As shown in FIG. 1, an endoscope 1 having an optical component according to the first embodiment for observing the inside of a body cavity and performing diagnosis, treatment, etc., includes a light source device 2 and a signal processing device 3. The signal processing device 3 is connected to the observation monitor 4
Is connected. The endoscope 1 has an elongated and flexible insertion portion 5 that is inserted into a body cavity of a patient. A rigid tip portion 6 is provided at the distal end of the insertion portion 5 and a proximal end portion of the insertion portion 5 is provided at the proximal end thereof. An operation unit 7 is provided.

As shown in FIG. 2, a light guide 11 for guiding illumination light from the light source device 2 is provided at the tip portion 6.
And an illumination lens 12 for illuminating the inside of the body cavity,
Further, an observation optical system 13 for observing the inside of the body cavity is provided. The illumination lens 12 and the observation optical system 13 are held by a metal tip 14 and fixed by fixing screws 15. The tip metal piece 14 is covered with an insulating cover 16 formed of resin or the like for insulating the tip metal piece 14 from the body cavity.

An image pickup device section 17 having an image pickup device such as a CCD is arranged at the image forming position of the observation optical system 13.
The observation image formed by the observation optical system 13 is converted into an electric signal by the imaging element unit 17 and transmitted to the signal processing device 3, and is converted into a video signal by the signal processing device 3 and output to the observation monitor 4.

The observation optical system 13 includes an optical component 20 in which a tip lens 18 which is an optical element located at the forefront and a cylindrical support portion 19 which supports the tip lens 18 are integrally formed, and the tip lens 18. The objective lens 21 held by the support portion 19 on the base end side of the and the positioning member 22 for positioning these.

As shown in FIG. 3, the optical component 2
0, the tip lens 18 is a resin for optical components, and is formed of an optically transparent methacrylic resin (PMMA). The support portion 19 is formed of optically opaque, for example, black methacrylic resin (PMMA). And these are integrally formed by injection molding by two-color molding. Since the support portion 19 is optically opaque, it prevents unnecessary light from entering the tip lens 18 from the outer peripheral portion of the tip lens 18, and prevents occurrence of defects such as flare and ghost in the observed image. doing.

Next, a method of manufacturing the optical component 20 will be described.

As shown in FIG. 4, the support portion 19 is formed by injecting the black PMMA into the primary cavity 33 formed by the male die 31 and the primary female die 32. It is formed by the primary molding process of color molding.

Next, the primary female die 32 is separated from the male die 31, and as shown in FIG. 5, the secondary female die 34 is set in the male die 31 instead of the primary female die 32. To be done. Then, the optically transparent PMMA is injected into the secondary cavity 35 formed by the male die 31, the molded support portion 19 and the secondary female die 34, so that the tip lens 18 is formed. It is formed by a secondary molding process of two-color molding.

The molding temperature at the time of the secondary molding is a temperature at which the PMMA used in the primary molding and the PMMA used in the secondary molding can be welded in the molding die, for example, 200 ° C. to 270.
Set to ° C. During the secondary molding process, when hot PMMA flows into the mold, the inner peripheral portion 36 of the support portion 19 formed by the primary molding has a transparent PMMA flowed therein due to the heat of the flowed resin. The secondary molding is completed while welding.

As described above, the abutting portions of the tip lens 18 and the supporting portion 19 are joined together by welding to be integrally formed.

(Operation) Since the tip lens 18 is secondarily molded after the support portion 19 is primarily molded, the tip lens 18 is formed.
No injection molding is performed after the completion of molding. For this reason,
No injection pressure or heat is applied to the tip lens 18 that has been molded by injection molding. Further, the compressive force due to the contraction of the support portion 19 after molding is not applied from the outer periphery of the tip lens 18.

As described above, the tip lens 18 having good optical performance can be formed without being altered, deformed, or distorted.

Further, since the step of assembling the tip lens 18 and the supporting portion 19 is not necessary, the productivity is good and the optical component 20 can be manufactured at a very low cost.

(Effect) Since the tip lens 18 having good optical performance can be formed, it is possible to provide the optical component 20 of the endoscope apparatus which has good observation performance and is inexpensive.

6 to 11 relate to the second embodiment of the present invention. FIG. 6 is a configuration diagram showing the configuration of a cover-type endoscope having optical components, and FIG. 7 is an endoscope for a cover of FIG. FIG. 8 is a sectional view showing a cross section of the distal end cover portion in the insertion axis direction when the endoscope is attached to the endoscope, FIG. 8 is a configuration diagram showing a configuration of a distal end surface of the distal end cover portion of FIG. 7, and FIG. FIG. 10 is a first explanatory view for explaining the method of manufacturing the portion, FIG. 10 is a second explanatory view for explaining the method of manufacturing the tip cover portion of FIG.
FIG. 11 shows a third method for manufacturing the tip cover portion of FIG.
FIG.

(Structure) As shown in FIG. 6, a cover-type endoscope 51 having the optical components of the second embodiment.
Is composed of a combination of a cover endoscope 52 and an endoscope cover 53 mounted on the cover endoscope 52.

When performing an endoscopic examination, the cover endoscope 5 is covered by a clean insert cover 54 of the endoscope cover 53.
The second insertion part 55 is covered.

The endoscope cover 53 is discarded after the inspection. Then, the cover endoscope 52 is covered with a new clean endoscope cover 53 again, and is characterized by being repeatedly used. Therefore, it is possible to save the trouble of cleaning and disinfecting the cover endoscope 52.

A distal end cover portion 57 for accommodating a distal end portion 56 provided at the distal end of the insertion portion 55 of the cover endoscope 51 is provided at the distal end of the insertion portion cover 54 of the endoscope cover 53.

The tip cover portion 57 is provided with the cover endoscope 52.
When the endoscope cover 53 is attached to the front end of the cover endoscope 52, as shown in FIG. 7, the illumination window 62 located on the front end side of the illumination optical system 61 provided at the front end portion 56 of the cover endoscope 52.
An optical element section and a frame member 65 that supports the optical element section are integrally formed in the observation window 64 or the like located on the tip side of the observation optical system 63 provided in the tip section 56.

The frame member 65 is provided with a light blocking member 66 that optically blocks the illumination window 62 and the observation window 64, and the illumination light emitted from the illumination optical system 61 is reflected within the cross section of the illumination window 62. Repeatedly enter the adjacent observation window 64,
It prevents the observation performance from deteriorating due to flare and ghosts. It should be noted that a convex portion 67 protruding from the proximal end surface of the illumination window 62 and the observation window 64 is provided on the proximal end side of the light shielding member 66.

The observation optical system 63 and the observation window 64 are made of optically transparent PMMA which is a resin for optical components. On the other hand, the frame member 65 is optically opaque, for example, black or the like, and is made of polycarbonate (P) which is a resin having a welding property with the resin forming the illumination window 62 and the illumination optical system 61.
C).

As shown in FIG. 8, the illumination window 62 and the observation window 64 are such that the two illumination windows 62 are arranged substantially symmetrically with respect to the observation window 64, and the illumination window 62 and the observation window 64 are connected to each other by the connecting portion 7.
They are connected by 1 and are integrally formed.

The observation window 64 includes an illumination window 62 and an observation window 6
4 is provided with a gate 72 when molding
Is provided in a portion of the observation window 64 other than the optical effective range 73 corresponding to the visual field range of the observation image.

When forming the illumination window 62 and the observation window 64, the resin flowing from the gate 72 flows in the direction of the arrow in FIG. The flow rate of the resin flowing from the gate 72 rapidly decreases when the resin flow path is narrowed like the connecting portion 71.

When the flow velocity of the resin decreases, so-called flow marks, which are fine wavy patterns formed on the molded product, are likely to occur. In the present embodiment, since the gate 72 is provided in the observation window 64 instead of the illumination window 62, the observation window 6
No flow mark is generated in No. 4, and the observation performance is not deteriorated. On the other hand, even if a flow mark is generated in the illumination window 62, the function of illumination is hardly deteriorated, so that observation is not affected.

Further, since the illumination window 62 is arranged substantially symmetrically with respect to the observation window 64 and the gate 72, it is possible to prevent variations in the moldability of the two illumination windows 62 and the two illumination windows 62.
The degree of freedom of molding conditions for preventing the generation of flow marks is large, and it is easy to prevent the generation of flow marks.

Further, since a plurality of gates are not provided, no weld line is generated in the illumination window 62 and the observation window 64, so that the observation performance does not deteriorate.

Next, a method of manufacturing the tip cover portion 57 will be described.

As shown in FIG. 9, first, male molds 81 and 1 are used.
Primary cavity 83 formed by secondary female die 82
Then, the black polycarbonate (PC) is injected to form the frame member 65 in the primary molding step of two-color molding.

Next, the primary female die 82 and the male die 81 are separated, and as shown in FIG. 10, the secondary female die 84 is replaced with the male die 81 instead of the primary female die 82. Set. And
Male mold 81, molded frame member 65 and secondary female mold 84
The transparent PC is injected into the secondary cavity 85 formed by and the illumination window 62 and the observation window 64 are formed by the secondary molding step of two-color molding.
It should be noted that the male die 81 has a light blocking member 6 during the primary molding process.
6 is provided with a convex portion 67, and a convex portion forming portion 86 for fitting the convex portion 37 at the time of secondary molding is provided.

(Operation) As shown in FIG.
The resin in the secondary cavity 85 at the time of the secondary molding that has flowed in from flows in the direction of the dashed arrow in the figure. At this time, a force for deforming the light shielding member 66 is applied to the light shielding member 66 by the injection pressure of the resin in the direction of a practical arrow in the drawing.

At this time, as shown in FIG. 10, since the convex portion 67 provided on the light shielding member 66 is fitted with the convex portion forming portion 86 of the male die 81, the light shielding member 66 is deformed. The light-shielding member 66 can be formed with good dimensional accuracy. Further, the light shielding member 66 can be formed as thin as possible.

From the above, the observation field and the illumination range of the illumination light are not narrowed by the light shielding member 66. Also,,
Since the illumination window 62 and the observation window 64 can be arranged close to each other, the outer diameter of the tip cover portion 57 can be reduced.

Further, since the illumination window 62 and the observation window 64 are formed by secondary molding, injection pressure and heat are not applied to the illumination window 62 and the observation window 64 which have been molded. Further, no compressive force is applied due to contraction of the frame member 65 after molding. Therefore, the illumination window 62 and the observation window 64 do not deteriorate and become colored, deformed, or distorted.

(Effect) Since the illumination window 62 and the observation window 64 having good optical performance can be formed, it is possible to provide an inexpensive cover-type endoscope apparatus having good observation performance and illumination performance.

12 to 15 relate to the third embodiment of the present invention, FIG. 12 is a structural view showing the constitution of the tip end surface of the tip end cover portion, and FIG. 13 is a sectional view taken along the line AA of FIG. FIG. 14 is a sectional view, FIG. 14 is an enlarged view showing an enlargement of a main part of FIG.
FIG. 5 is a configuration diagram showing a configuration of a main portion of a tip of a modified example of the tip cover portion of FIG.

Since the third embodiment is almost the same as the second embodiment, only different points will be described, the same components will be denoted by the same reference numerals, and description thereof will be omitted.

(Structure) On the base end side of the light shielding member 66, as shown in FIG.
A recess 91 as shown in FIG. 13 is provided at the position of the broken line shown in FIG.

In the third embodiment, as shown in FIG. 14, the male die 101 is provided with a recess 91 provided in the light shielding member 66 during the primary molding step of forming the frame member 65. At the time of secondary molding for forming the illumination window 62 and the observation window 64, a recess forming portion 102 that fits into the recess 91 is provided.

Then, as shown in FIG.
Is an optical effective range 73 near the connecting portion 71 of the observation window 64.
It is provided at a position other than. Gate 72 to connection 7
Since the distance to 3 is very short, the decrease in the flow velocity of the resin flow at the connecting portion 73 is small. Therefore, it is possible to prevent the generation of flow marks in the observation window 54 and the illumination window 52.

(Operation) In addition to the operation of the second embodiment, as shown in FIG. 13, since the projections do not project on the base end sides of the observation window 64 and the illumination window 62, the illumination optical system 61 and the observation window 62 are observed. The optical system 63 does not protrude from the tip portion 56, and the illumination optical system 61 is used as the illumination window 62 and the observation optical system 63 is used as the observation window 6.
4 can be abutted. Therefore, the light blocking member 66
It is possible to prevent the observation field of view and vignetting of the illumination light, and to prevent the illumination optical system 61 and the observation optical system 63 from being damaged.

(Effects) In addition to the effects of the second embodiment, it is possible to provide a durable cover type endoscope apparatus in which the illumination optical system 61 and the observation optical system 63 are not easily damaged.

As shown in FIG. 15, the light shielding member 66.
The convex portion 112 may be provided on the end portion 111 on the tip side of the.

With this structure, the convex portion 112 can be fitted to the male die 101 (not shown) during the secondary molding to prevent the light shielding member 66 from being deformed.

FIG. 16 is a sectional view showing the tip cross section of the tip cover portion according to the fourth embodiment of the present invention.

Since the fourth embodiment is almost the same as the third embodiment, only different points will be described, the same components will be denoted by the same reference numerals, and description thereof will be omitted.

(Structure) As shown in FIG. 16, the light shielding member 6
A convex portion 121 is provided on the base end side of 6. The base end side surface 122 on the base end side of the observation window 64 is formed on the same surface as the base end side of the convex portion 121. 1 for male die 123
The convex portion 121 is formed during the next molding step, and the convex portion forming portion 124 that fits with the convex portion 121 during the secondary molding and that forms the base end side surface 122 of the observation window 64 is provided. There is.

(Operation) At the time of the secondary molding, the light-shielding member 6 is moved in the direction of the arrow shown in FIG. 11 by the injection pressure of the flowing resin.
A force to deform 6 is applied. At this time, since the convex portion 121 is fitted with the convex portion forming portion 124 of the male die 123,
The light shielding member 66 does not deform and has a good size.
6 can be formed.

In the present embodiment, even when the width of the light shielding member 66 is extremely small and it is difficult to form the recess 91 in the third embodiment, the observation optical system 63 is configured not to protrude from the tip portion 56. The observation optical system 63 can be brought into contact with the observation window 64.

Accordingly, since the width of the light shielding member 66 can be reduced, the illumination window 62 and the observation window 64 can be arranged close to each other, and the outer diameter of the tip cover portion 57 can be reduced.

(Effects) In addition to the effects of the third embodiment,
It is possible to provide a cover-type endoscope device having a good insertability into the body cavity having a small outer diameter of the distal end cover portion 57.

The present invention is not limited to the above-mentioned respective embodiments, and the method of molding the optical component 20 and the tip cover portion 57 is not limited to the above-mentioned tip lens such as the support portion 18 and the light shielding member 66. The member adjacent to the optical element portion such as 19, the illumination window 62, and the observation window 64 is molded with resin, then taken out from the molding die and inserted into another molding die to mount the optical element portion with another resin. General insert molding may be used, or the two-color molding described above may be used.

Further, the optical component 20 in the first embodiment may be applied not only to the observation optical system of the endoscope but also to the illumination optical system provided at the tip of the insertion portion,
In a fiberscope having an eyepiece optical system, it may be applied to an eyepiece optical element such as an eyepiece lens exposed on the outer surface of the eyepiece optical system and a supporting member supporting the eyepiece optical element.

Further, the resin forming the optical element portion is P
Any resin may be used as long as it can be used as an optical component such as MMA, AS, PS, and the member adjacent to the optical element section is
Not limited to PC and PMMA, any resin may be used.

Further, the tip lens 19 and the illumination lens 12 in the first embodiment and the insulating cover 16 made of resin are used as the insertion portion cover 5 in the second embodiment.
7 may be integrally formed.

Further, not only the endoscope but also the image pickup optical system such as a still camera or a video camera may be applied.

Further, the fitting portion such as the convex portion and the concave portion provided on the light shielding portion for fitting with the male die is not limited to the above-mentioned form,
Any form may be used as long as it can be fitted to the male mold so as to prevent deformation of the light shielding part during the secondary molding.

The point is that the member adjacent to the optical element portion may be formed of resin first, and the optical element portion may be formed by insert molding using this as an insert, and these may be integrally formed.

[Appendix] (Appendix 1) An optical component in which an optical element portion formed of a first resin and an adjacent member formed of a second resin adjacent to the optical element portion are integrally formed. In the above, the adjacent member is primarily molded, and the optical element portion is secondarily molded by insert molding using the adjacent member as an insert, whereby the optical element portion and the adjacent member are integrally formed. Optical component to be used.

In the optical component of Appendix 1, the injection pressure and heat are not applied to the optical element section which has been molded, and the compressive force due to the contraction of the member adjacent to the optical element section after molding is optical. It does not add to the element section. Due to the above, the formed optical element portion is not altered or deformed. Therefore, the optical element can be accurately formed. Further, since the step of assembling the optical element section and the member adjacent thereto is unnecessary, the optical component can be manufactured at low cost.

(Supplementary Note 2) The optical element part and the optical element part are formed by a two-color molding process in which the adjacent member is primarily molded and the optical element part is secondarily molded without removing the adjacent member from a molding die. The optical component according to appendix 1, wherein the adjacent members are integrally formed.

(Additional Item 3) The optical component according to Additional Item 1 or 2, wherein the adjacent member is a support member that supports the optical element portion.

(Additional Item 4) In the additional item 1 or 2, wherein a plurality of the optical element portions are provided, and the adjacent member is a light shielding member which optically blocks the plurality of optical element portions. The described optical component.

(Additional Item 5) The optical component according to any one of Additional Items 1, 2, 3 or 4, wherein the adjacent member is formed of an optically opaque resin.

(Additional Item 6) The first resin and the second resin
6. The optical component according to any one of appendices 1, 2, 3, 4 or 5, wherein the resin is a resin of substantially the same type.

(Additional Item 7) The first resin and the second resin
6. The optical component according to any one of appendices 1, 2, 3, 4 or 5, wherein the resin is a different type of resin.

(Additional Item 8) An optical component having an optical element integrally formed with an optical element portion formed of a first resin and an adjacent member formed of a second resin adjacent to the optical element portion. In an endoscope apparatus including an endoscope, the adjacent member is primarily molded, and the optical element unit is secondarily molded by insert molding using the adjacent member as an insert, and the optical element unit and the adjacent member. An endoscope device characterized by being integrally formed.

(Additional Item 9) The optical element portion and the optical element portion are formed by a two-color molding process in which the adjacent member is primarily molded and the optical element portion is secondarily molded without removing the adjacent member from a molding die. 9. The endoscope apparatus according to item 8, wherein the adjacent members are integrally formed.

(Additional Item 10) The optical element section is an observation optical element located at the front end of the observation optical system provided at the tip of the insertion section of the endoscope, and the adjacent member is the observation optical system. The endoscope device according to item 8 or 9, which is a support member that supports the element.

(Supplementary Note 11) The optical element section is an illumination optical element located at the forefront of an illumination optical system provided at the tip of the insertion section of the endoscope, and the adjacent member is the illumination optical system. The endoscope device according to item 8 or 9, which is a support member that supports the element.

(Additional Item 12) The endoscope is a fiberscope having an eyepiece optical system, and the optical element section is an eyepiece optical element exposed on an outer surface of the eyepiece optical system, The member is a supporting member that supports the eyepiece optical element, and the endoscope apparatus according to item 8 or 9, characterized in that.

(Additional Item 13) The optical element section is an observation optical element located at the tip of the observation optical system provided at the tip of the endoscope and an illumination optical element located at the tip of the illumination optical system. The endoscopic device according to appendix 8 or 9, wherein the adjacent member is a light blocking member that optically blocks the observation optical element and the illumination optical element.

(Additional Item 14) The endoscope apparatus according to Additional Item 13, wherein the adjacent member is formed of an optically opaque resin.

(Additional Item 15) The endoscope includes a cover endoscope having an observation optical system and an illumination optical system at a tip of an insertion portion, and an endoscope detachably attached to the cover endoscope. The endoscope includes a mirror cover, and the optical element part is an observation window provided at the tip of the endoscope cover so as to be located on the tip side of the observation optical system of the endoscope and illumination of the endoscope. An illumination window provided so as to be located on the tip side of the optical system, wherein the adjacent member is a support member that supports the optical element section, the support member is primarily molded, and the support member is inserted. 9. The endoscope apparatus according to appendix 8, wherein the optical element portion is secondarily formed by insert molding as a physical object, and the optical element portion and the support member are integrally formed.

(Additional Item 16) The optical element part and the optical element part are formed by a two-color molding process in which the support member is primarily formed and the optical element part is secondarily formed without removing the support member from a molding die. 16. The endoscope apparatus according to item 15, wherein the support member is integrally formed.

(Additional Item 17) The endoscope includes a cover endoscope having an observation optical system and an illumination optical system at a tip of an insertion portion, and an endoscope detachably mounted on the cover endoscope. The endoscope includes a mirror cover, and the optical element part is an observation window provided at the tip of the endoscope cover so as to be located on the tip side of the observation optical system of the endoscope and illumination of the endoscope. An illumination window provided so as to be located on the front end side of the optical system, wherein the adjacent member is a light blocking member that optically blocks the observation window and the illumination window, and the light blocking member is primarily molded. The optical element section and the light shielding member are integrally formed by secondary molding of the optical element section by insert molding using the light shielding member as an insert. Mirror device.

(Additional Item 18) The optical element part and the optical element part are molded by a two-color molding process in which the light shielding member is primarily molded and the optical element part is secondarily molded without taking out the light shielding member from a molding die. 18. The endoscope device according to item 17, wherein the light shielding member is integrally formed.

(Additional Item 19) The adjacent member is provided with a fitting portion for fitting with a molding die for secondary molding during the secondary molding for forming the optical element portion. The endoscope apparatus according to any one of Supplementary Notes 8, 9, 13, 17 or 18.

(Additional Item 20) A plurality of the optical element portions are provided, and the adjacent member is a light-shielding member that optically blocks the plurality of optical element portions. The light-shielding member is provided with an optical element portion. 20. The endoscope apparatus according to item 19, further comprising a fitting portion that is fitted into a molding die for performing the secondary molding during the secondary molding for forming.

In the endoscope apparatus according to the additional items 19 and 20, the resin forming the optical element section is formed by fitting the fitting section provided on the light shielding member with the male die when molding the optical element section. The light-shielding portion is prevented from being deformed by the injection pressure of. Therefore, the light shielding member can be formed thin. As described above, since the observation visual field, the illumination range, and the like are not narrowed by the light shielding member, the observation optical element and the illumination optical element can be arranged close to each other, and the diameter of the distal end portion of the endoscope can be reduced.

(Additional Item 21) The endoscope apparatus according to Additional Item 20, wherein the fitting portion is provided on the base end face side of the light shielding member.

(Additional Item 22) The endoscope device according to Additional Item 21, wherein the fitting portion is formed in a convex shape.

(Additional Item 23) The endoscope apparatus according to Additional Item 21, wherein the fitting portion is formed in a concave shape.

[0095]

As described above, according to the optical component of the present invention, the adjacent member is primarily molded, and the optical element portion is secondarily molded by the insert molding using the adjacent member as an insert. Also, since the adjacent member is integrally formed, there is an effect that an optical element can be accurately formed and an inexpensive optical component having good optical performance can be realized.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing a configuration of an endoscope apparatus including an endoscope having an optical component according to a first embodiment of the present invention.

2 is a cross-sectional view showing a cross section of the distal end portion of the endoscope of FIG. 1 in the insertion axis direction.

FIG. 3 is a configuration diagram showing a configuration of the optical component of FIG.

FIG. 4 is a first explanatory diagram illustrating a method of manufacturing the optical component of FIG.

FIG. 5 is a second explanatory diagram illustrating a method of manufacturing the optical component of FIG.

FIG. 6 is a configuration diagram showing a configuration of a cover-type endoscope having an optical component according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view showing a cross section in the insertion axis direction of the distal end cover portion of the cover endoscope of FIG. 6 when the endoscope cover is attached.

FIG. 8 is a configuration diagram showing a configuration of a front end surface of a front end cover portion of FIG.

FIG. 9 is a first diagram illustrating a method of manufacturing the tip cover portion of FIG.
Illustration of

FIG. 10 is a second explanatory diagram illustrating a method of manufacturing the front end cover portion of FIG.

FIG. 11 is a third explanatory diagram illustrating the method of manufacturing the front end cover portion of FIG. 7.

FIG. 12 is a configuration diagram showing a configuration of a distal end surface of a distal end cover portion according to a third embodiment of the present invention.

13 is a cross-sectional view showing a cross section taken along line AA of FIG.

FIG. 14 is an enlarged view showing an enlargement of a main part of FIG.

FIG. 15 is a configuration diagram showing a configuration of a main part of a tip of a modified example of the tip cover section of FIG. 12;

FIG. 16 is a sectional view showing a distal end cross section of a distal end cover portion according to a fourth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Endoscope 2 ... Light source device 3 ... Signal processing device 4 ... Observation monitor 5 ... Insertion part 6 ... Tip part 7 ... Operation part 11 ... Light guide 12 ... Illumination lens 13 ... Observation optical system 14 ... Tip hardware 15 ... Fixed Screw 16 ... Insulating cover 17 ... Imaging element part 18 ... Tip lens 19 ... Support part 20 ... Optical component 21 ... Objective lens 22 ... Positioning member 31 ... Male mold 32 ... Primary female mold 33 ... Primary cavity 34 ... 2 Next female die 35 ... Secondary cavity 36 ... Inner peripheral portion

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location G02B 23/26 G02B 23/26 A // B29K 33:04

Claims (1)

[Claims] 1. An optical component in which an optical element section made of resin and an adjoining member made of resin adjoining the optical element section are integrally formed, wherein the adjoining member is primarily molded, An optical component characterized in that the optical element part is secondarily formed by insert molding using an adjacent member as an insert to integrally form the optical element part and the adjacent member.