JPH09105871A - Optical component - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical component which has excellent optical performance and can be constituted strongly at low cost. SOLUTION: The tip part 6 of the insert part of an endoscope is provided with an observation optical system 9 together with a light guide 7 and a lighting lens 8, and they are held and fixed in a tip part main body 10. The observation optical system 9 has the optical component 16 constituted by uniting a top lens 14 at the tip and a support part 15 supporting it and an objective 17 held by a support part 15 at the base end of the tip lens 14. The tip lens 14 is formed of optically transparent methacrylic resin (PMMA) and the support part 15 is formed of optically opaque, e.g. black methacrylic resin (PMMA) to constitute the optical component 16; and those members are formed in one body by dichroic injection molding and their abutting parts are joined together by being fused in a mold.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention is used in a photographing optical system of a camera or a video camera, an observation optical system of an endoscope, and the like.
An optical element such as a lens arranged in the optical system,
The present invention relates to an optical component integrally formed with a member that is adjacent to an optical element such as a support portion that supports the optical element.

[0002]

2. Description of the Related Art Conventionally, optical components used in photographing optical systems of cameras and video cameras, observation optical systems of endoscopes, etc. are manufactured by separately manufacturing an optical element such as a lens and a supporting portion of this optical element. By assembling these,
Manufactured optical components. Therefore, there are problems that the manufacturing cost is increased due to the assembling process of combining the two members, and the optical performance is deteriorated due to an attachment error between the optical element and the supporting member during the assembling process.

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

Further, the present applicant has filed Japanese Patent Application No. 6-26916.
In No. 8, at the tip of the insertion portion of the endoscope, a lens cover portion formed of a resin material that is an optical element, and formed of a resin material adjacent to the lens cover portion, the lens cover portion is provided with an observation window. A light-shielding member for optically blocking the lighting window and the light-shielding member are integrally formed by insert molding, two-color molding or the like.

[0005]

In the conventional optical component, no consideration is given to the method of joining the optical element portion to the support portion or the light-shielding member, so that the optical element portion and other members come into contact with each other. The parts were merely in contact with each other or were bonded with an extremely weak bonding force.

In such a structure, water or water vapor may pass through at the contact portion between the optical element portion and the support portion or the light shielding member. When this optical component is used in cameras, video cameras, endoscopes, etc., if the optical component is exposed to the outside, water or water vapor will enter the inside of the optical element, making it unusable, or water vapor There was a problem that it became unusable due to dew condensation and cloudiness. Further, even if a light external force is applied, the optical element portion and the support portion or the light shielding member may be easily displaced from each other to deteriorate the optical performance, or the joint may be disengaged to make it unusable.

The present invention has been made in view of these circumstances, and vapor or the like may enter the inside to cause fogging,
It is an object of the present invention to provide an optical component which is durable and can be inexpensively constructed without fear of deteriorating optical performance.

[0008]

An optical component according to the present invention has an optical element section and a member adjacent to the optical element section, and one of these members is primarily molded with a first resin. Is formed as an insert, and the other is secondarily molded by a second resin by insert molding to form the optical element part and a member adjacent to the optical element part integrally. In the optical component, the abutting portion between the optical element portion and a member adjacent to the optical element portion is welded and joined in a molding die.

[0009]

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 configuration explanatory view showing a configuration of an endoscope apparatus, FIG. 2 is a sectional view showing a configuration of a distal end portion of an insertion portion of an endoscope, 3 is a cross-sectional view showing the configuration of the optical component, FIG. 4 is a cross-sectional view showing the configuration of a molding die used in the primary molding of the optical component shown in FIG. 3, and FIG. 5 is a diagram showing the optical component shown in FIG. It is sectional drawing which shows the structure of the shaping die used at the time of secondary shaping.

The first embodiment shows a structural example in which the optical component of the present invention is applied to an observation optical system of an endoscope.

FIG. 1 shows the overall configuration of an endoscope apparatus including an endoscope including the optical component of this embodiment. The endoscope 1 includes a light source device 2 and a signal processing device 3.
Is connected, and the observation monitor 4 is connected to the signal processing device 3, which constitutes an endoscope device for observing the inside of a body cavity or the like and performing diagnosis, treatment, or the like. The endoscope 1 includes an elongated and flexible insertion portion 5 which is inserted into a body cavity of a patient or the like.
The insertion part 5 has a hard tip 6 at the tip thereof.
Is provided.

FIG. 2 shows an example of the structure of the distal end portion 6 of the insertion portion 5. The tip 6 is provided with a light guide 7 for guiding the illumination light from the light source device 2 and an illumination lens 8 for illuminating the illumination light on the site to be examined. In addition to these illumination optical systems, an observation optical system 9 for observing the site to be inspected is provided. These light guide 7 tip portion, illumination lens 8, observation optical system 9
Is held by the tip end main body 10 made of a metal member and fixed by a fixing screw 11 or the like. An outer peripheral portion of the tip body 10 on the tip side is covered with an insulating cover 12 formed of a resin or the like for insulating the outer surface of the tip body 10 from a subject such as a body cavity.

An image pickup device section 13 having an image pickup device such as a CCD is arranged at an image forming position of the observation optical system 9, and an observation image formed by the observation optical system 9 is picked up by the image pickup device section 13.
Is converted into an electric signal by the signal processing device 3 and transmitted to the signal processing device 3. The signal processing device 3 converts the signal into a video signal which is output to the observation monitor 4 and displayed on the observation monitor 4 as an observation image of the region to be examined. Has become.

The observation optical system 9 is an optical component 16 in which a tip lens 14 which is an optical element located at the most tip end and a cylindrical support portion 15 which supports the tip lens 14 are integrally formed.
The objective lens 17 held by the support portion 15 on the base end side of the tip lens 14 and the positioning member 18 for positioning these lenses.

FIG. 3 shows the detailed construction of the optical component 16. The tip lens 14 is formed of an optically transparent methacrylic resin (PMMA) which is a resin for optical components. The support portion 15 is formed of, for example, a black methacrylic resin (PMMA) that is optically opaque in order to prevent flare, ghost, and the like. These members are integrally formed by injection molding by two-color molding to form the optical component 16.

Next, a method of manufacturing the optical component 16 will be described.

FIG. 4 shows the structure of the molding die for the primary molding for molding the tip lens 14, and FIG. 5 shows the structure of the molding die for the secondary molding for molding the support portion 15, respectively. .

First, in the primary cavity 21 formed by the male die 19 and the primary female die 20, the transparent PM mentioned above is placed.
By injecting MA, the front end lens 14 is formed by the primary molding process of two-color molding. After forming the tip lens 14, the primary female die 20 is separated from the male die 19. At this time, the tip lens 14 moves together with the primary female mold 20 into the male mold 1.
In order to prevent separation from the outer mold 9, a concave portion 25 is provided in the outer peripheral portion of the tip lens 14 that abuts the end surface of the male mold 19 as shown in FIG. ing.

Next, as shown in FIG. 5, the secondary female die 22 is set on the male die 19. Here, in the secondary cavity 23 formed by the male die 19 and the molded tip lens 14 and the secondary female die 22, the black PMMA described above is provided.
By injecting, the support portion 15 is formed by the secondary molding step of two-color molding.

The molding temperature in the secondary molding process is such that the PMMA used in the primary molding is the same as the PMMA used in the secondary molding.
And a temperature at which welding can be performed in the molding die, for example, 200 ° C to 290
Set to ° C. At this time, high temperature P due to secondary molding
When the MMA flows into the mold, the outer peripheral portion 24 of the tip lens 14 molded by the primary molding completes the secondary molding while being welded to the colored PMMA by the heat of the flowing resin.

As described above, the abutting portions of the tip lens 14 and the supporting portion 15 are welded and integrally formed.

In the configuration of the optical component 16 of the present embodiment, since the portion of the outer periphery of the tip lens 14 that is in contact with the support portion 15 is welded, liquid, water vapor, and the like are fed from the tip side of the tip lens 14 to the tip lens. It does not pass through the abutting portions of the support portion 15 and the support portion 15 and enter the base end side of the tip lens 14. For this reason, it is possible to prevent the observation component from becoming unobservable and the inside of the tip lens 14 from becoming cloudy due to invasion of water vapor or the like into the optical component 16. Further, since the tip lens 14 and the support portion 15 are firmly joined with the same type of resin, the tip lens 14 and the support portion 15 are not displaced and the optical performance is not deteriorated. It does not happen.

Further, since the process of assembling the tip lens 14 and the supporting portion 15 is not necessary, the cost required for the assembling process can be omitted and the manufacturing can be carried out at a very low cost. Further, since the molding is performed by the two-color molding, it is not necessary to take out the tip lens 14 from the molding die or set it in the die, and the productivity is good.

Further, in the conventional optical component, since no consideration is given to the order of molding the optical element portion, the support portion and the light shielding member, it is different from the optically opaque light shielding member and the optical element portion first. When the optical element part is formed after forming a support part made of a resin of a kind, the light shielding member is formed by the flow of the resin forming the optical element part in the mold during the step of forming the optical element part. And the resin forming the support part is melted or scraped off, and the opaque resin mixes with the resin for forming the optical element part and solidifies, impairing the optical performance of the optical element part. There was a fear. Therefore, there is a problem that it may be difficult to form an optical element unit having desired optical performance.

In this embodiment, since the tip lens 14 which is an optical element is primarily molded and the black support portion 15 is secondary molded, a black resin is molded in the mold when the tip lens 14 is molded. The black resin does not mix into the transparent resin because there is no. For this reason, it is possible to form the tip lens 14 having high transparency without mixing of foreign matter, and it is possible to maintain good optical performance.

As described above, according to the present embodiment, it is possible to provide an optical component for an endoscope apparatus which has a high bonding strength between the tip lens 14 and the support portion 15, is strong, has good observation performance, and is inexpensive. . In addition, since the same type of resin as the resin used for the primary molding is used for the resin used for the secondary molding, it is possible to provide a strong optical component that has good weldability to each other and a strong bonding force.

When the secondary molding is carried out at a suitable molding temperature with good moldability for the resin used, it can be easily welded to the resin which has been primary molded. Furthermore, if the primary molding is performed at a suitable molding temperature with good moldability for the resin used, both moldings can be performed at the optimum molding temperature, so the molding shape and moldability are good, and productivity can be improved. it can.

Further, after the tip lens 14 which is an optical element is primary-molded, the black support portion 15 is secondary-molded, so that the colored resin is mixed into the transparent resin which constitutes the optical element. It is possible to provide an optical component of an endoscopic device that can be prevented and has good optical performance and is inexpensive.

6 to 10 relate to a second embodiment of the present invention, FIG. 6 is a structural explanatory view showing a structure of a cover type endoscope, and FIG. 7 is a cover with an endoscope cover attached. Sectional drawing which shows the structure of the insertion part front-end | tip part of a type | formula endoscope, FIG. 8 is the top view which looked at the front-end cover part of an endoscope cover from the front end side, FIG. 9 is primary molding of the front-end cover part shown in FIG. FIG. 10 is a cross-sectional view showing the structure of a molding die used in this case, and FIG. 10 is a cross-sectional view showing the structure of a molding die used in the secondary molding of the tip cover portion shown in FIG.

The second embodiment shows a configuration example in which the optical component of the present invention is applied to an optical unit of a cover type endoscope.

FIG. 6 shows the structure of a cover-type endoscope including the optical component of this embodiment. The cover-type endoscope 26 is composed of a combination of a cover endoscope 27 and an endoscope cover 28 attached to the cover endoscope 27. This cover-type endoscope 26 is shown in FIG.
Similarly to the above, it is connected to the light source device 2 and the signal processing device 3 so that the site to be examined can be observed.

When performing an endoscopic examination using such a cover-type endoscope 26, the insert portion cover 39 of the clean endoscope cover 28 is used by the insert portion 38 of the cover endoscope 27.
Are covered and the endoscope cover 28 is discarded after the inspection. On the other hand, the cover endoscope 27 is characterized in that a new clean endoscope cover 28 is attached again and repeatedly used.

At the tip of the insertion portion cover 39 of the endoscope cover 28, the tip portion 30 of the insertion portion 38 of the cover endoscope 27 is provided.
Is provided with a tip cover portion 29.

7 and 8 show the detailed structure of the tip cover portion 29. The tip cover portion 29 is used for the cover endoscope 27.
With the endoscope cover 28 attached to the cover, the illumination optical system 31 provided at the tip portion 30 of the cover endoscope 27.
An optical element including an illumination window 32 located on the tip side of the observation optical system 33 and an observation window 34 located on the tip side of an observation optical system 33 provided at the tip of the insertion portion 38 of the cover endoscope 27, and a frame for supporting them. The member 35 and the member 35 are integrally formed.

The frame member 35 includes an illumination window 32 and an observation window 34.
A light blocking member 36 that optically blocks the light is provided. The light shielding member 36 is provided so as to penetrate from the front end surface to the base end surface of the illumination window 32 and the observation window 34.

By constructing the tip cover portion 29 as described above, the illumination light emitted from the illumination optical system 31 is directly incident on the observation window 34, or is repeatedly reflected in the cross section of the illumination window 32 for adjacent observation. This prevents the observation performance from deteriorating due to flare, ghosts, or the like incident upon the window 34.
Therefore, it is possible to provide a cover-type endoscope with good observation performance.

The illumination window 32 and the observation window 34 are optically transparent methacrylic resin (PMM) which is a resin for optical parts.
It is formed in A). On the other hand, the frame member 35 is optically opaque, for example, black, and has the illumination window 32 and the observation window 3.
It is formed of polycarbonate (PC) which is a resin having a weldability by heating with the resin forming No. 4. The outer peripheral portions of the base end surfaces of the illumination window 32 and the observation window 34 are provided with a convex portion 37 protruding toward the base end side. These lighting windows 32
The observation window 34 and the frame member 35 are integrally formed by injection molding by two-color molding to form an optical component.

Next, a method of manufacturing the tip cover portion 29 which is an optical component will be described.

FIG. 9 shows the structure of the molding die for the primary molding for molding the illumination window 32 and the observation window 34 of the tip cover portion 29.
FIG. 10 shows a configuration of a molding die in the secondary molding for molding the frame member 35 of the tip cover portion 29.

First, the transparent PMMA described above is injected into the primary cavity 21A formed by the male mold 19A and the primary female mold 20A, so that the illumination window 32 and the observation window 34 are subjected to the two-color primary molding process. It is formed.
The molding temperature at this time is set to a suitable molding temperature of PMMA, for example, 220 to 270 ° C., and molding is performed.

After forming the illumination window 32 and the observation window 34, the primary female die 20A is separated from the male die 19A. At this time, the convex portions 3 provided on the illumination window 32 and the observation window 34 that are formed
7 is fitted in the male mold 19A as shown in FIG.
The illumination window 32 and the observation window 34 are prevented from separating from the male mold 19A.

Next, as shown in FIG. 10, the secondary female die 22
A is set in the male die 19A. Here, male mold 19
By injecting the above-mentioned black PC into the secondary cavity 23A formed by A, the illumination window 32, the observation window 34, and the secondary female mold 22A, the frame member 35 is subjected to the secondary molding step of the two-color molding. It is formed.

The molding temperature in the secondary molding step is set to a temperature at which the PMMA used in the primary molding can be welded to the PC used in the secondary molding in the molding die, for example, 250 to 300 ° C. Since PC and PMMA have good weldability, when PC flows into the mold during the secondary molding, the outer peripheral portion 24A of the illumination window 32 and the observation window 34 molded by the primary molding is The secondary molding is completed while welding with the colored PC by heat.

As described above, the abutting portions of the illumination window 32, the observation window 34 and the frame member 35 are welded and integrally formed.

In the configuration of the optical component of the present embodiment, the PMMAs having mutual weldability as the resin to be molded.
After the primary molding of PMMA using PC and PC, PMMA
Since the PC having a higher preferable molding temperature is secondarily molded, the illumination window 32, the observation window 34, and the frame member 35 can be formed in a good welded state even with different materials. Therefore, the illumination window 32 and the observation window 34, which are optical elements, may be formed of PMMA, which has relatively good optical performance, and the frame member 35, which is a support member, may be formed of PC, which has relatively high mechanical strength. it can.

Contrary to the above-described molding method, when the illumination window 32 and the observation window 34 are secondarily formed after the frame member 35 having the elongated light shielding member 36 is firstly formed, the light shielding member 36 is not formed. Since it is very thin, there is a problem that it is deformed by the pressure of the resin at the time of secondary molding, but in this embodiment, since no force is applied to the light shielding member 36 after molding,
The light blocking member 36 can be accurately formed.

According to the present embodiment, as in the first embodiment, it is possible to provide a cover-type endoscope having good optical performance and high strength of the frame member 35 which is a support portion of the optical element. Also,
Since the light-shielding part can be formed thinly and accurately, there is no observing field of view or eclipse of illumination light, and the illumination optical system and the observation optical system can be placed close to each other. An endoscope can be provided.

The illumination lens 8, the tip lens 14, and the insulating cover 12 shown in the first embodiment are integrally molded like the illumination window 32, the observation window 34, and the frame member 35 of the second embodiment. May be.

11 to 13 relate to the third embodiment of the present invention, FIG. 11 is a plan view of the distal end cover portion of the endoscope cover as seen from the distal end side, and FIG. 12 shows the configuration of the distal end cover portion. FIG. 13 is a sectional view showing the structure of a molding die used for molding the tip cover portion shown in FIG.

The third embodiment shows a configuration example in which the configuration of the distal end cover portion of the endoscope cover in the second embodiment is changed. Here, the configuration of the portion other than the distal end cover portion of the cover-type endoscope is the same as that of the second embodiment, and therefore description thereof is omitted.

End cover portion 29B of the endoscope cover 28
Is the illumination window 32B, the observation window 34B, and the cover endoscope 27.
An optical cover portion 41 in which a front end portion storage portion 40 for storing the front end portion 30 is integrated, an illumination window 32B and an observation window 34B.
And a light-blocking member 36B that optically shuts off the gap between and. The light blocking member 36B is arranged so as to penetrate from the front end surface to the base end surface of the illumination window 32B and the observation window 34B.

The optical cover portion 41 is made of optically transparent polycarbonate (PC). On the other hand, the light blocking member 36B is formed of optically opaque polycarbonate (PC) such as black. The optical cover part 41 and the light shielding member 36B are integrally formed by injection molding by two-color molding to form an optical component.

Next, a method of manufacturing the tip cover portion 29B of this embodiment will be described.

FIG. 13 shows the light shielding member 3 of the tip cover portion 29B.
6B shows a configuration of a molding die at the time of secondary molding for molding 6B.

First, as the primary molding step, as in the second embodiment, the transparent PC described above is injected into the primary cavity formed by the male die 19B and the primary female die (not shown) to illuminate the illumination window 32B. And the optical cover part 41 which has the observation window 34B is formed.

Next, as a secondary molding step, as shown in FIG. 13, the male mold 19B, the optical cover portion 41 and the secondary female mold 2 are formed.
By injecting the black PC described above into the secondary cavity 23B formed by 2B and
Is formed.

By such two-color molding, the abutting portions of the optical cover portion 41 and the light shielding member 36B are welded and integrally formed in the same manner as in the above embodiment.

In the configuration of the optical component of this embodiment, since the optical cover portion 41 and the light shielding member 36B are made of PC which is a resin having high mechanical strength, the tip cover portion is different from that of the second embodiment. The strength of 29B is increased.
Further, since the optical cover portion 41 and the light shielding member 36B are formed of the same type of resin, the joining force due to the welding of these contact portions is strong.

When the primary female die is separated from the male die 19B after the optical cover portion 41 is molded, the tubular tip end accommodating portion 40 is fitted with the male die 19B. It is possible to prevent the optical cover part 41 from being separated from the male mold 19B. Therefore, unlike the second embodiment, it is not necessary to provide the convex portion 37 and the like for preventing the male mold 19B from being separated from the base end surfaces of the illumination window 32B and the observation window 34B.

According to the present embodiment, as in the second embodiment, it is possible to provide a cover-type endoscope having a distal end cover portion 29B which has good optical performance, high strength, and durability. Also,
It is possible to effectively utilize the space inside the distal end housing portion 40, and it is possible to provide a cover-type endoscope that can reduce the diameter of the distal end because there is no convex portion.

14 to 17 relate to the fourth embodiment of the present invention. FIG. 14 is a plan view of the distal end cover portion of the endoscope cover as seen from the distal end side, and FIG. 15 shows the structure of the distal end cover portion. FIG. 16 is a cross-sectional view, FIG. 16 is a cross-sectional view showing the configuration of a molding die used for primary molding of the tip cover portion shown in FIG.
FIG. 16 is a cross-sectional view showing a configuration of a molding die used for secondary molding of the tip cover portion shown in FIG. 15.

The fourth embodiment shows a configuration example in which the configuration of the light shielding member of the tip cover portion in the third embodiment is changed. Here, the configuration of the portion other than the distal end cover portion of the cover-type endoscope is the same as that of the second and third embodiments, and therefore the description is omitted.

Tip cover portion 29C of the endoscope cover 28
Is an illumination window 32C, an observation window 34C, and a tip end storage section 40C.
41C, which is an integrated optical cover, and 32C of the illumination window
And light-shielding member 36 for optically blocking between the observation window 34C
C and C are integrally formed. Light-shielding member 3
6C is provided with a flange portion 42 for increasing a joint area with the optical cover portion 41C on the entire circumference of the light shielding member 36C on the base end side.

The optical cover portion 41C is made of optically transparent acrylonitrile styrene (AS).
On the other hand, the light shielding member 36C is made of optically opaque acrylonitrile styrene (AS) such as black. The optical cover portion 41C and the light shielding member 36C are
The optical component is integrally formed by injection molding by two-color molding.

Next, a method of manufacturing the tip cover portion 29C of this embodiment will be described.

FIG. 16 shows the structure of a molding die for the primary molding for molding the optical cover portion 41C of the tip cover portion 29C, and FIG. 17 shows the molding for the secondary molding for molding the light shielding member 36C of the tip cover portion 29C. The respective structures of the molds are shown.

First, the transparent AS described above is injected into the primary cavity 21C formed by the male die 19C and the primary female die 20C, so that the illumination window 32C and the observation window 3 are formed.
An optical cover portion 41C having 4C is formed by a two-color molding primary molding process.

Next, the male die 19C and the optical cover portion 41
By injecting the black AS described above into the secondary cavity 23C formed by C and the secondary female die 22C, the light shielding member 36C is formed by the secondary molding step of the two-color molding.

By such two-color molding, the abutting portions of the optical cover portion 41C and the light shielding member 36C are welded and integrally formed in the same manner as in the above embodiment.

In the configuration of the optical component of the present embodiment, since the light shielding member 36C is provided with the flange portion 42, the strength of the joining by welding the optical cover portion 41C and the light shielding member 36C becomes stronger. In addition, the optical cover unit 41
Since the base end side of C is formed by the primary female die 20C and then the base end side of the light shielding member 36C is formed by the secondary female die 22C, the flange portion 42 is formed on the base end side of the light shielding member 36C. The illumination window 32C and the observation window 34 can be provided.
Since the width of the light shielding member 36C is not wide on the tip side of C, the optical effective ranges of the illumination window 32C and the observation window 34C can be sufficiently secured.

According to the present embodiment, it is possible to provide a cover-type endoscope having a distal end cover portion 29C which is high in strength and toughness and has good observation performance and illumination performance as in the third embodiment.

It should be noted that the present invention is not limited to the above-mentioned respective embodiments, and the resin forming the optical element portion can be used as an optical component such as PC, PMMA, AS, PS (polystyrene). Any resin may be used as long as it is. As the resin forming the member adjacent to the optical element portion such as the support portion or the light shielding member, the optical element portion is P
PC, PMMA, ABS (acrylonitrile butadiene styrene) is used for C, PMMA, PC, AS, ABS is used for the optical element section, and AS, PMMA, ABS, etc. is used for the optical element section. Any resin may be used as long as it is a resin that is weldable to the resin forming the optical element portion.

The molding method of the optical element section and the member adjacent to the optical element section is as follows. After molding one of them with resin, it is taken out from the molding die and inserted into another molding die to obtain another. It may be general insert molding that is secondary molded with resin, or after molding either one with resin,
Two-color molding may be performed in which the female mold is changed and secondary molding is performed with another resin without taking out from the molding mold. Further, the molding order of the optical element portion and the member adjacent to the optical element portion may be either first.

Further, the optical component of the present invention can be applied not only to the observation optical system of the endoscope but also to the illumination optical system provided at the distal end of the endoscope insertion portion, or in a fiberscope having an eyepiece optical system. It may be applied to an eyepiece optical system. Further, not only the endoscope but also an optical system such as a still camera and a video camera can be applied.

The point is that the optical element section and the member adjacent thereto are formed of the first resin in one of these members, and the other is formed by insert molding using the formed member as an insert. Any structure can be applied as long as it is formed from the second resin and the formed members are welded and joined in a molding die.

[Additional Notes] (1) An optical element portion and a member adjacent to the optical element portion are provided, and one of these members is formed by primary molding with a first resin, and this is inserted. In the optical component in which the optical element part and a member adjacent to the optical element part are integrally formed by forming the other by secondary molding with a second resin by insert molding as an object, An optical component, wherein an abutting portion between an element portion and a member adjacent to the optical element portion is welded and joined in a molding die.

(2) One of the optical element portion and a member adjacent to the optical element portion is formed by primary molding with a first resin, and the other is formed by secondary molding with a second resin. 2. The optical component according to appendix 1, wherein the optical component is integrally formed by a two-color molding process.

(3) The optical component described in appendix 1 or 2, wherein the first resin and the second resin are weldable to each other.

(4) The optical component according to any one of appendices 1 to 3, wherein the secondary molding is performed at a molding temperature higher than a temperature at which the first resin and the second resin can be welded.

In the configurations of Supplementary Notes 1 to 4, since the contact portion between the optical element portion and the member adjacent to the optical element portion is formed in a welded state, the optical element portion and the member adjacent to the optical element portion are The joining force of is strong. Further, it is possible to prevent the passage of water or water vapor at the contact portion. Therefore, it is possible to provide a durable and inexpensive optical component that has good observation performance without the risk of clouding or deterioration of optical performance.

(5) The optical system according to any one of appendices 1 to 4, wherein the second resin is a resin that has a preferable molding temperature that is substantially the same as the preferable molding temperature of the first resin. component.

(6) The optical component according to any one of appendices 1 to 4, wherein the second resin is a resin having a preferable molding temperature higher than the preferable molding temperature of the first resin. .

In the structures of Supplementary Notes 5 and 6, the primary molding is performed at a suitable molding temperature of the first resin for which the primary molding is performed, and
Secondary molding is carried out at a suitable molding temperature of the second resin, and at this time, the suitable molding temperature of the second resin is substantially the same as the suitable molding temperature of the first resin or more than this temperature. When the temperature is also high, the resin to be subjected to the secondary molding is easily welded to the resin that has been subjected to the primary molding. Therefore, a good molded shape can be obtained, and an optical component with good productivity can be provided.

(7) The optical component according to any one of appendices 1 to 5, wherein the first resin and the second resin are substantially the same type of resin.

In the structure of Supplementary Note 7, the first resin and the second resin are substantially the same type of resin, so that they have good weldability to each other, and the optical element section and the member adjacent to the optical element section are well bonded to each other. We can provide strong optical components with strong bonding force.

(8) The optical component described in appendices 1 to 6, wherein the first resin and the second resin are different types of resins.

In the structure of Supplementary Note 8, an optimum resin can be used for each of the optical element portion and the members adjacent to the optical element portion, and the optical component has good optical performance and high strength in the portion adjacent to the optical element portion. it can.

(9) The optical component according to any one of appendices 1 to 4, wherein a member adjacent to the optical element portion is formed of an optically opaque resin.

(10) The optical component described in Supplementary Notes 1 to 4, wherein the member adjacent to the optical element section is a support member for the optical element section.

(11) The optical element section comprises a plurality of optical element elements, and the member adjacent to the optical element section is a light-shielding member that optically blocks the plurality of optical element elements. Optical components according to 1-4, 9.

With the configurations of Supplements 9 and 11, it is possible to prevent unnecessary light from entering the optical element section, and to provide an optical component having good optical performance without flare or ghost.

(12) Primary molding of the optical element section,
5. The optical component according to any one of appendices 1 to 4, wherein a member adjacent to the optical element portion is secondarily formed and integrally formed.

(13) The optical component described in any one of appendices 1 to 4, characterized in that a member adjacent to the optical element section is primarily molded, and the optical element section is secondarily molded to be integrally formed.

(14) An optical element section and a member adjacent to the optical element section are provided, and one of these members is formed from the first resin, and the other is formed by insert molding using this as an insert. In an endoscope device including an endoscope including an optical component integrally formed with the optical element portion and a member adjacent to the optical element portion by forming the optical element from the second resin. An endoscope apparatus, wherein a contact portion between the optical element portion and a member adjacent to the optical element portion in a component is welded and joined in a molding die.

(15) The optical component is formed by primary molding one of the optical element portion and a member adjacent to the optical element portion with a first resin, and the other with a second resin. Supplementary Note 1 characterized in that it is integrally formed by a two-color molding process of secondary molding
The endoscopic device according to item 4.

(16) The optical element section constitutes an observation optical element located at the tip of the observation optical system provided at the tip of the insertion section of the endoscope, and is a member adjacent to the optical element section. Is a support member that supports the observation optical element, The endoscope apparatus according to Supplementary Note 14 or 15.

According to the structure of appendix 16, it is possible to provide an endoscope apparatus having a durable optical component with good observation performance.

(17) The optical element section constitutes an illumination optical element located at the leading edge of the illumination optical system provided at the tip of the insertion section of the endoscope, and a member adjacent to the optical element section. Is a support member that supports the illumination optical element, The endoscope apparatus according to appendix 14 or 15.

According to the structure of appendix 17, it is possible to provide an endoscope apparatus provided with a durable optical component having good illumination performance.

(18) The endoscope is a fiberscope having an eyepiece optical system, and the optical element section constitutes an eyepiece optical element exposed on the outer surface of the eyepiece optical system. 16. The endoscope apparatus according to appendix 14 or 15, wherein the adjacent member is a supporting member that supports the eyepiece optical element.

(19) The optical element section includes an observation optical element located at the tip of the observation optical system provided at the tip of the insertion portion of the endoscope and an illumination optical element located at the tip of the illumination optical system. The endoscope device according to appendix 14 or 15, wherein the member adjacent to the optical element portion is a light blocking member that optically blocks the observation optical element and the illumination optical element. .

(20) The endoscope apparatus according to appendix 19, wherein the light shielding member is provided so as to penetrate from the front end surface to the base end surface of the optical element section.

(21) The endoscope apparatus according to any one of appendices 14 to 20, wherein a member adjacent to the optical element section is formed of an optically opaque resin.

With the configurations of Supplementary Notes 19 to 21, it is possible to prevent the illumination light from entering the observation optical element from the illumination optical element, and it is possible to provide an endoscope apparatus having good observation performance without flare or ghost.

(22) The endoscope apparatus according to any one of appendices 14 to 19, wherein the first resin and the second resin are weldable to each other.

(23) The secondary molding is performed at a molding temperature higher than a temperature at which the first resin and the second resin can be welded to each other. Mirror device.

(24) Note 14, 15, 2 characterized in that the second resin is a resin having a suitable molding temperature approximately the same as the preferred molding temperature of the first resin.
The endoscope apparatus according to 2, 23.

(25) The second resin is a resin whose preferable molding temperature is higher than the preferable molding temperature of the first resin.
The endoscope apparatus according to 2, 23.

(26) Note 1 characterized in that the first resin and the second resin are resins of substantially the same type
The endoscope device according to 4, 15, 22 to 24.

(27) Note 1 characterized in that the first resin and the second resin are different types of resin
The endoscope device according to 4, 15, 22 to 25.

(28) Primary molding of the optical element section is performed,
Additional notes 14, 15, 22, 23 characterized in that a member adjacent to the optical element part is secondarily formed and integrally formed.
An endoscope apparatus according to claim 1.

(29) Supplementary notes 14, 15, 22, 23 characterized in that a member adjacent to the optical element section is primarily molded, and the optical element section is secondarily molded to be integrally formed.
An endoscope apparatus according to claim 1.

Addendum 14 to 18, 22, 23, 28, 29
According to the configuration of (1), there is no risk of clouding of the field of view and deterioration of optical performance as in Appendix 1, and it is possible to configure a durable and inexpensive endoscope apparatus with good observation performance.

(30) A cover endoscope having an observation optical system and an illumination optical system at the tip of the insertion section, and an endoscope cover detachably attached to the cover endoscope are provided. A distal end portion of the endoscope cover includes an observation window provided so as to be located at a distal end side of the observation optical system and an illumination window provided so as to be located at a distal end side of the illumination optical system. An optical element part and a supporting member that supports these optical element parts are provided, and one of the optical element part and the supporting member is formed by primary molding with a first resin, and this is formed as an insert. In the endoscope device in which the optical element portion and the supporting member are integrally formed by forming the other by secondary molding by insert molding, the optical element portion and the supporting member are formed. Weld the abutting part with and weld it in the mold An endoscopic device characterized in that

(31) A cover endoscope having an observation optical system and an illumination optical system at the tip of the insertion portion, and an endoscope cover detachably mounted on the cover endoscope are provided. A distal end portion of the endoscope cover includes an observation window provided so as to be located at a distal end side of the observation optical system and an illumination window provided so as to be located at a distal end side of the illumination optical system. An optical element part and a light blocking member for optically blocking the observation window and the illumination window are provided, and one of the optical element part and the light blocking member is formed by primary molding with a first resin. By forming the other by secondary molding with a second resin by insert molding using this as an insert,
In an endoscope device in which the optical element portion and the light shielding member are integrally formed, the contact portion between the optical element portion and the light shielding member is welded and joined in a molding die. Endoscope device.

(32) One of the optical element portion and the supporting member is primary molded with the first resin, and the other is secondary molded with the second resin without taking it out from the molding die. 31. The endoscope apparatus according to appendix 30, wherein these are integrally formed by a two-color molding process.

(33) One of the optical element portion and the light-shielding member is primary-molded with the first resin, and the other is secondary-molded with the second resin without taking it out from the molding die. 32. The endoscope apparatus according to appendix 31, wherein these are integrally formed by a two-color molding process.

According to the configurations of Supplements 30 to 33, even in the cover type endoscope apparatus, there is no possibility of clouding of the visual field or deterioration of the optical performance as in Supplement 14, and the observation performance is good. In addition, a durable and inexpensive endoscope apparatus can be configured.

(34) The endoscope apparatus according to supplementary notes 31 and 33, wherein the light shielding member is provided so as to penetrate from the front end surface to the base end surface of the optical element section.

(35) Supplementary Notes 31, 33, 3 characterized in that the light shielding member is formed of an optically opaque resin.
The endoscopic device according to item 4.

(36) The endoscope apparatus according to appendices 30 to 33, characterized in that the first resin and the second resin are weldable to each other.

(37) The optical component described in Appendix 3, wherein the first resin is a methacrylic resin and the second resin is a polycarbonate.

(38) The optical component described in appendix 3, wherein the first resin is a methacrylic resin and the second resin is acrylonitrile styrene.

(39) The optical component described in Appendix 3, wherein the first resin is a methacrylic resin and the second resin is acrylonitrile butadiene styrene.

(40) The optical component described in Appendix 3, wherein the first resin is polycarbonate and the second resin is methacrylic resin.

(41) The optical component described in Appendix 3, wherein the first resin is polycarbonate and the second resin is acrylonitrile butadiene styrene.

(42) The optical component as set forth in appendix 3, wherein the first resin is acrylonitrile styrene and the second resin is a methacrylic resin.

(43) The optical component described in appendix 3, wherein the first resin is acrylonitrile styrene and the second resin is acrylonitrile butadiene styrene.

(44) The optical component described in appendix 3, wherein the first resin and the second resin are methacrylic resins.

(45) The optical component described in Appendix 3, wherein the first resin and the second resin are polycarbonate.

(46) The optical component described in Appendix 3, wherein the first resin and the second resin are acrylonitrile styrene.

(47) The optical component as set forth in appendix 3, wherein the first resin and the second resin are polystyrene.

(48) The optical component as set forth in appendix 3, wherein the optical element section is made of methacrylic resin and a member adjacent to the optical element section is made of polycarbonate.

(49) The optical component described in Appendix 3, wherein the optical element section is made of methacrylic resin and the member adjacent to the optical element section is made of acrylonitrile styrene.

(50) The optical component described in appendix 3, wherein the optical element section is formed of methacrylic resin, and the member adjacent to the optical element section is formed of acrylonitrile butadiene styrene.

(51) The optical component described in appendix 3, wherein the optical element section is made of polycarbonate, and a member adjacent to the optical element section is made of methacrylic resin.

(52) The optical component as set forth in appendix 3, wherein the optical element portion is made of polycarbonate, and the member adjacent to the optical element portion is made of acrylonitrile butadiene styrene.

(53) The optical component as set forth in appendix 3, wherein the optical element portion is made of acrylonitrile styrene and the member adjacent to the optical element portion is made of methacrylic resin.

(54) The optical component as set forth in appendix 3, wherein the optical element portion is made of acrylonitrile styrene and the member adjacent to the optical element portion is made of acrylonitrile butadiene styrene.

(55) In an optical component in which an optical element section made of resin and a member adjacent to the optical element section made of resin are integrally formed, the optical element section is primarily molded, and An optical component in which these members are integrally formed by secondary molding of a member adjacent to the optical element portion by insert molding using the above as an insert.

In the structure of appendix 55, after the optical element portion is primary-molded, the member adjacent to this optical element portion is secondary-molded. Therefore, when the optical element portion is molded, it is adjacent to the optical element portion. It is possible to form a highly transparent optical element portion in which a resin forming a member is not mixed and a foreign material is not mixed. Therefore, it is possible to provide an inexpensive optical component having good optical performance.

(56) Primary molding of the optical element section,
The optical element part and the member adjacent to the optical element part are integrally formed by a two-color molding process in which a member adjacent to the optical element part is secondarily molded without taking it out from a molding die. The optical component according to attachment 55.

In the structure of appendix 56, the molded optical element portion is taken out from the molding die or set in another molding die by performing the secondary molding without taking out the primary molded member from the molding die. It is possible to provide an optical component which is cheaper and has high productivity without needing to do so.

(57) The optical component as described in appendix 55 or 56, wherein the member adjacent to the optical element section is formed of an optically opaque resin.

(58) The optical component described in any one of appendices 55 to 57, characterized in that the member adjacent to the optical element section is a support member for supporting the optical element section.

(59) The optical element section comprises a plurality of optical element elements, and the member adjacent to the optical element section is a light-shielding member that optically blocks the plurality of optical element elements. 55. An optical component according to 55 to 57.

(60) An endoscope apparatus including an endoscope including an optical component in which an optical element section made of resin and a member adjacent to the optical element section made of resin are integrally formed. In, the primary molding of the optical element portion, and by secondary molding a member adjacent to the optical element portion by insert molding using this as an insert, these are formed integrally Mirror device.

(61) Primary molding of the optical element section,
The optical element part and the member adjacent to the optical element part are integrally formed by a two-color molding process in which a member adjacent to the optical element part is secondarily molded without taking it out from a molding die. The endoscope apparatus according to Appendix 60.

(62) The endoscope apparatus according to appendix 60 or 61, wherein the member adjacent to the optical element section is made of an optically opaque resin.

(63) The optical element section constitutes an observation optical element located at the forefront of the observation optical system provided at the tip of the insertion section of the endoscope, and is a member adjacent to the optical element section. Is a support member that supports the observation optical element. The endoscope apparatus according to supplementary notes 60 to 62.

(64) The optical element section constitutes an illumination optical element located at the leading edge of the illumination optical system provided at the tip of the insertion section of the endoscope, and a member adjacent to the optical element section. Is a supporting member that supports the illumination optical element, and the endoscope apparatus according to any one of appendices 60 to 62.

(65) The endoscope is a fiberscope having an eyepiece optical system, and the optical element section constitutes an eyepiece optical element exposed on the outer surface of the eyepiece optical system. 63. The endoscope apparatus according to supplementary notes 60 to 62, wherein the adjacent member is a supporting member that supports the eyepiece optical element.

(66) The optical element section includes an observation optical element located at the tip of the observation optical system provided at the tip of the insertion portion of the endoscope and an illumination optical element located at the tip of the illumination optical system. The endoscope device according to any one of appendices 60 to 62, wherein the member adjacent to the optical element unit is a blocking member that optically blocks the observation optical element and the illumination optical element. .

(67) A cover endoscope having an observation optical system and an illumination optical system at the tip of the insertion portion, and an endoscope cover detachably attached to the cover endoscope are provided. And an observation window provided at the distal end of the endoscope cover as the optical element portion so as to be located at the distal end side of the observation optical system, and provided at the distal end side of the illumination optical system. 63. The endoscope apparatus according to supplementary notes 60 to 62, further comprising: an illumination window, and a supporting member that supports the optical element unit as a member adjacent to the optical element unit.

(68) A cover endoscope having an observation optical system and an illumination optical system at the tip of the insertion portion, and an endoscope cover detachably attached to the cover endoscope are provided. And an observation window provided at the distal end of the endoscope cover as the optical element portion so as to be located at the distal end side of the observation optical system, and provided at the distal end side of the illumination optical system. Supplementary notes 60 to 62, wherein an illumination window is provided, and a light-shielding member that optically blocks the observation window and the illumination window is provided as a member adjacent to the optical element section.
An endoscope apparatus according to claim 1.

[0156]

As described above, according to the present invention, there is no possibility that water vapor or the like will penetrate into the interior to cause fogging and the optical performance will be deteriorated, and the optical structure can be constructed robust and inexpensive. It has the effect of providing components.

[Brief description of the drawings]

FIG. 1 is a configuration explanatory view showing a configuration of an endoscope apparatus according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a configuration of a distal end portion of an insertion portion of an endoscope.

FIG. 3 is a cross-sectional view showing the configuration of the optical component of the first embodiment.

FIG. 4 is a cross-sectional view showing the configuration of a molding die used for primary molding of the optical component according to the first embodiment.

FIG. 5 is a cross-sectional view showing the configuration of a molding die used for secondary molding of the optical component according to the first embodiment.

FIG. 6 is a configuration explanatory view showing a configuration of a cover-type endoscope according to a second embodiment of the present invention.

FIG. 7 is a cross-sectional view showing the configuration of the distal end portion of the insertion portion of the cover-type endoscope with the endoscope cover attached.

FIG. 8 is a plan view of the distal end cover portion of the endoscope cover according to the second embodiment as seen from the distal end side.

FIG. 9 is a cross-sectional view showing the configuration of a molding die used for primary molding of the tip cover portion according to the second embodiment.

FIG. 10 is a cross-sectional view showing the configuration of a molding die used for secondary molding of the tip cover portion according to the second embodiment.

FIG. 11 is a plan view of the distal end cover portion of the endoscope cover according to the third embodiment of the present invention as seen from the distal end side.

FIG. 12 is a cross-sectional view showing a configuration of a tip cover portion according to a third embodiment.

FIG. 13 is a cross-sectional view showing the configuration of a molding die used when molding the distal end cover portion according to the third embodiment.

FIG. 14 is a plan view of a distal end cover portion of an endoscope cover according to a fourth embodiment of the present invention viewed from the distal end side.

FIG. 15 is a cross-sectional view showing a configuration of a tip cover portion according to a fourth embodiment.

FIG. 16 is a cross-sectional view showing the configuration of a molding die used for primary molding of the distal end cover portion according to the fourth embodiment.

FIG. 17 is a cross-sectional view showing the configuration of a molding die used for secondary molding of the tip cover portion according to the fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Endoscope 5 ... Insertion part 6 ... Tip part 9 ... Observation optical system 14 ... Tip lens 15 ... Support part 16 ... Optical component 19 ... Male mold 20 ... Primary female mold 21 ... Primary cavity 22 ... Secondary female Mold 23 ... Secondary cavity

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location G02B 7/02 G02B 7/02 B // B29K 33:04

Claims (1)

[Claims] 1. An insert comprising an optical element section and a member adjacent to the optical element section, and one of these members is formed by primary molding with a first resin, which is used as an insert. In the optical component in which the optical element section and a member adjacent to the optical element section are integrally formed by forming the other by secondary molding with a second resin by molding, the optical element section and the An optical component characterized in that an abutting portion with a member adjacent to an optical element portion is welded and joined in a molding die.