JPS6066221A - Endoscope device - Google Patents

Abstract

PURPOSE:To improve the assembling efficiency by providing an attaching member, which is centered to an objective lens system, on a lens supporting frame of the objective lens system so that this member is projected to the side of the light detecting face of a solid-state image pickup device. CONSTITUTION:The light from an object to be observed in an endoscope device is focused through an objective lens system 2A, and the device is so designed that this focusing position is placed in the position of the rear end of a lens supporting frame 8 approximately by combination of plural lenses. Consequently, in case of assembling of the endoscope, the supporting frame 8 in which the objective lens system 2A is set is fixed into the front end part of an endoscope insertion part 1, and the part of an optical glass 11 projected to the front of a package 10 is inserted from an aperture part in the rear end of the supporting frame 8, thereby fix a solid-state image pickup device 3 in an optimum focusing position in the state where optical axes of the objective lens system 2A and the solid-state image pickup device 3 coincide with each other.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an endoscope device, and particularly to a tip fN of an endoscope insertion portion.
In the case of incorporating a solid-state IR image element in the IM component,
A lens support frame that incorporates the objective lens system is provided, and a mounting member to which the solid-state image sensor is attached is inserted into the support frame in a state in which it is centered with respect to the objective lens system, so that it can be fixed at the focused position. The present invention relates to an endoscopic device.

[Technical background of the invention and its problems] In recent years, devices have been developed that use solid-state imaging devices such as charge-coupled devices (hereinafter referred to as COD) as one image means in television cameras, electronic cameras, endoscopes, etc. There is.

In an endoscope apparatus using such a solid-state image sensor, the distal end component of the endoscope insertion section is configured as shown in FIG. That is, an objective lens 2 is attached to the tip of an insertion section 1 that is inserted into a living body cavity or a cavity such as a mechanical component.
The light from the object to be observed passes through the objective lens 2 and forms an image on the light-receiving surface of a solid-state image sensor 3 such as a COD placed at the rear, and the formed optical image is converted into an electrical signal 4 and then The signal is sent to the signal processing circuit section in the second stage, undergoes necessary signal processing, and is displayed on a television monitor.

On the other hand, an illumination lens 5 is attached to the tip of the endoscope insertion section 1, and for example, an external light source device is guided to the illumination lens 5 through a light guide 6 to illuminate the 12th festival holiday.

By the way, in the endoscope device configured as above, what happens inside? J! When the solid-state image sensor 3 is installed behind the objective lens 2 disposed at the tip of the mirror insertion part 1, the optical axes of the objective lens 2 and the solid-state image sensor 3 are aligned, and the light-receiving surface of the solid-state image sensor 3 is It is arranged at a predetermined distance 1lltF@ from the objective lens 2 so as to be in the optimum focus position.

However, in the conventional internal system II device, when a solid m element is installed at the tip of the endoscope insertion part, it is difficult to incorporate internal ! For each mirror device, it is necessary to individually adjust and arrange the solid-state image sensor with respect to the objective lens.
There is a problem in that it is complicated to align the optical axes of the elements and to arrange the light-receiving surface of the solid-state image carrier at the focal position.

[Object of the Invention] In view of the above-mentioned points, the present invention provides a method for easily aligning the optical axes of an objective lens system and a solid-state image sensor when incorporating a solid-state image sensor into the distal end portion of an endoscope insertion portion, and for a solid-state R machine. It is an object of the present invention to provide an endoscope device in which the light-receiving surface of an element can be quickly set and fixed at a focus position, and the relativity at the time of installation is improved.

[Summary of the Invention] The internal mirror device of the present invention includes a mounting member that is centered in advance with respect to the objective lens system on the light-receiving surface side of the solid-state elementary image so that it can be inserted into the lens support frame of the objective lens system. This mounting member is inserted into the lens support frame to fix the solid-state image sensor in a focused position.

[Embodiments of the Invention] Hereinafter, embodiments of the present invention will be described based on the drawings.

FIG. 2 is a sectional view showing the configuration of the endoscope apparatus according to the present invention. However, the same reference numerals as in FIG. 1 indicate corresponding parts, and illumination means such as an illumination lens and a light guide are omitted.

In FIG. 2, reference numeral 1 indicates an endoscope insertion section,
Of these, the WHfl insertion section 1 is formed in a cylindrical shape, and a cylindrical lens support frame 8 is disposed in the axial direction at its distal end component.
This support frame 8 incorporates an objective lens system 2A that is a combination of a plurality of lenses. The objective lens system 2A is assembled on the front side of a lens support frame 8, and the support frame 8 is formed into a cylindrical shape 4 extending rearward, and is fixed within the distal end component using, for example, screws 9. The symbol @10 is a package that houses a solid-state image sensor 3 such as a COD, and the solid-state image sensor 3 is housed so that its light-receiving surface is exposed to the front. An optical glass 11 centered with respect to the objective lens system 2A is bonded to the light-receiving surface side of the package 10. Therefore, the optical glass 11 has a protruding cylindrical shape so that it can fit into the inner peripheral surface of the lens support frame 8.

The tip end surface of the optical glass 11 may be a flat surface, or may be formed into a curved surface as shown in FIG. 3 so as to be part of a lens system. Furthermore, it may be constructed using SELFOC instead of optical glass.

In the endoscope apparatus configured in this way, the light from the object to be observed is imaged through the objective lens system 2A, or the image formation position is set on the lens support frame 8 by a combination of multiple lenses.
It is designed to be located almost at the rear end of the Therefore, when assembling an endoscope, the support frame 8 incorporating the objective lens system 2A is fixed within the distal end component of the endoscope insertion section 1, and then the package 10 is inserted from the frontage of the rear end of the support frame 8.
Just push in and cover the optical glass 11 part that protrudes from the front.
The solid-state image sensor 3 can be fixed at an optimal imaging position with the optical axes of the objective lens system 2A and the solid-state image sensor 3 aligned.

FIG. 4 shows another embodiment of the present invention, in which a cylindrical frame 12 is joined to protrude from the light-receiving surface side of a package 10 containing a solid-state image carrier 3. It is formed of a metal member or the like, and is inserted into the inner peripheral surface of the lens support frame 8 from its rear end so that it can be fixed at a focused position. Therefore, in this case, the optical lens system 2Δ
The converged light passes through the hollow portions of the support frame 8 and the frame body 12 and forms an image on the light-receiving surface of the solid-state image sensor 3.

In the illustrated example, the objective lens in the front row has a tip configuration of 1ll.
Although the lens support frame 8 is directly assembled to the lens support frame 8, it is also possible to extend the lens support frame 8 further forward and incorporate the entire objective lens system 2A, including the objective lens in the front row, into the lens support frame 8. configured.

With this configuration, the mounting member bonded to the solid-state image pickup device 3 is inserted in advance into the lens support frame 8 incorporating the objective lens system 2A, and the tip configuration is performed with the solid-state image pickup device 3 set. It can also be incorporated and fixed inside part 1.

FIG. 5 shows endoscopy 1 according to the present invention! An example of the overall configuration of the device is shown. In this figure, reference numeral 1 denotes an endoscope insertion section, which is usually made of a metal member or a flexible member, and has an optical lens system 2A and an illumination lens 5 disposed at its tip. Behind the illumination lens 5, a line 1 to a guide 6, such as an optical fiber bundle, are disposed, and are configured so that the illumination light from the light source device 13 is irradiated from the illumination lens 5 onto the object to be observed through the light guide 6. There is. However, code 13A
is a spectral characteristic correction filter. Further, the optical lens system 2A is supported and fixed by a support frame 8, and a CCD 3 having an optical glass 11 (or frame 12) bonded to the light-receiving surface side is disposed behind it so as to be movable back and forth. There is. In this case, the CCD 3 is a color image carrying element having a color mosaic filter or a color stripe filter on its light receiving surface so as to enable color photography, and is installed in the package 10. The light reflected by the object to be observed passes through the optical lens system 2A and is filtered by a color mosaic filter or a color stripe filter R(
An image is formed on the light receiving surface of the CCD 3 using three colors of light (red), G (green), and B (stomach), and is converted into an electrical signal using the driver and preamplifier circuit 14 that drives the CCD 3 and amplifies the COD output. The signal is taken out and input to the signal processing circuit 15. The signal processing circuit 15 mainly consists of sample bold circuits 16, 17, and 18 for R, G, and B, and the electrical signals are converted to R, G, and B by sampling pulses corresponding to color mosaics or color stripes from the sampling pulse generation circuit 19. B and B are sampled and held and output to the color monitor 20. Therefore, from R, G, B sample hold circuit 16.17.18, R, G, B
A signal is output and displayed on the monitor 20.

[Effects of the Invention] As described above, according to the present invention, a mounting member is provided that protrudes from the light-receiving surface side of the solid-state image sensor and is centered on the lens support frame of the objective lens system with respect to the objective lens system. Since this is the set number,
When assembling, just insert this mounting member into the lens support frame and it's solid II! It is now possible to fix the l-image element at the focus position while being centered with respect to the objective lens system.
! The ease of assembling the mirror device can be significantly improved.

[Brief explanation of the drawing]

FIG. 1 is a sectional view illustrating the distal end component of a conventional endoscope device, FIG. FIG. 2 is a sectional view showing another embodiment of the optical glass shown in FIG. 2, and FIG. 2 is a configuration diagram showing an example of an endoscope apparatus according to the present invention. 2A...Objective lens system 3...Solid-state image sensor 8...
・Lens support frame 11.12...Continued from page 1 of mounting member 0 Inventor: Masaru Konomura, Hatagaya Co., Ltd., Shibuya-ku, Tokyo Inventor: Atsushi Miyazaki, Hatagaya Co., Ltd., Shibuya-ku, Tokyo 0 inventors 1) Masato, Hatagaya Co., Ltd., Shibuya-ku, Tokyo 0 inventors: Tsuyoshi Nakamura 0 inventors, Hatagaya Co., Ltd., Shibuya-ku, Tokyo 0 inventors Ken Sugawara 2, Hatagaya Co., Ltd., Shibuya-ku, Tokyo Chome 4 pm 2 No. Olympus Optical Kogyo 2 ryome 4 pm 2 No. Olympus Optical Kogyo 2 ryome 4 pm 2 No. Olympus Optical Kogyo 2 ryo 4 pm 2 Olympus Optical

Claims (1)

[Claims] Inside? ! A lens support frame is provided in the axial direction of the tip component of the mirror insertion part, and the objective lens system is incorporated into this lens support frame.
I of the lens support frame! Solid m inserted from the end side
a solid-state image sensor is mounted on the rear end of the pixel mounting member in a state centered with respect to the objective lens system within the lens support frame;
This installation involves inserting the solid-state image sensor mounting member into the lens support frame from the rear end side of the lens support frame, and inserting the solid-state image sensor mounting member into the lens support frame at the position where the objective lens system and the solid-state m-image element are in focus. A 7 mm device characterized in that it is configured to be fixed.