JP2003164418A - Endoscope device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an endoscope device in which a direct-view endoscope image and a side-view endoscope image adjusted to appropriate brightness are displayed on the screen of a display device by attaching an optical adapter for the endoscope. <P>SOLUTION: An optical adapter 9 at the front end has an adapter side light guide 80. The front end of the adapter side light guide 80 is bifurcated into a direct-view light guide 42 and side-view light guide 62. The rear end face of the adapter side light guide 80 is opposite to the front end face of another light guide 21. The adapter side light guide 80 is divided into the light guides 42 and 62 in such a manner that the number of lightguide fibers of the direct- view light guide 42 and the side-view light guide 62 are determined based on their difference in the distance to an observed area and according to a ratio indicated by the broken line 81. That is, the ratio of the number of lightguide fibers of the direct-view light guide 42 to that of he side-view light guide 62 is varied to vary the amount of light emitted. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention includes an endoscope and an endoscope optical adapter detachably connected to the endoscope and capable of observing two visual field directions of direct view and side view. And an endoscopic device.

[0002]

2. Description of the Related Art In recent years, an endoscope capable of observing internal organs in a body cavity by inserting an elongated insertion portion into the body cavity and performing various treatments using a treatment instrument inserted in a treatment instrument channel as needed. Is widely used. Also in the industrial field, industrial endoscopes are widely used for observing and inspecting scratches, corrosion and the like inside boilers, turbines, engines, chemical plants and the like.

An image pickup device such as a CCD is built in the distal end of the insertion portion of the endoscope, and an optical image formed on the image pickup device is displayed on the screen of a display device for observation. There is an electronic endoscope (hereinafter, abbreviated as an endoscope).

For example, when diagnosing or inspecting a lesion site of a body cavity wall or a flaw on the inner wall of a pipe using the endoscope, it has a plurality of visual field directions rather than an endoscope having one visual field direction. , It is convenient to have an endoscope that can observe in different directions at once. According to the endoscope of this configuration, the wall surface is first roughly observed with the image in the direct viewing direction,
If a part that may have a scratch or the like is found, a detailed examination of the part with an image in the side-viewing direction enables a wide-range inspection in a short time.

Therefore, for example, Japanese Unexamined Patent Publication No. 9-101465
Japanese Unexamined Patent Publication (Kokai) discloses an optical adapter for an endoscope having a direct-view optical system and a side-view optical system. By mounting the optical adapter for an endoscope on the electronic endoscope, a screen of a display device is displayed. A direct-viewing endoscopic image and a side-viewing endoscopic image are displayed on the upper side, and both images can be observed simultaneously.

[0006]

However, when observing, for example, the inner wall of a pipe with an endoscope equipped with the endoscope optical adapter, the illumination light emitted from the direct-view illumination optical system is at a distance from the direct-view illumination lens. While it illuminates the space in front of the pipe that is far away, the illumination light emitted from the side-view illumination optical system illuminates the inner wall of the pipe that is not too far from the side-view illumination lens. The side-view endoscope image is overexposed. In other words, the brightness of the image of the side-viewing endoscopic image is too bright (not suitable) as compared with the brightness of the direct-viewing endoscopic image, so that the observation of the direct-viewing endoscopic image and the side-viewing endoscopic image is performed. There was a problem that they could not be done at the same time.

The present invention has been made in view of the above circumstances, and by mounting an optical adapter for an endoscope,
An object of the present invention is to display an endoscopic image and a side-viewing endoscopic image adjusted to have proper brightness on the screen of a display device, and to provide an endoscopic device capable of observing both images at the same time. ing.

[0008]

The endoscope apparatus of the present invention comprises:
An endoscope having an image pickup device, and an endoscope optical adapter having a direct-viewing illumination optical system and a direct-viewing objective optical system, a side-viewing illumination optical system, and a side-viewing objective optical system that are detachably attached to a distal end portion of the endoscope. An endoscopic device comprising: a display device that simultaneously displays a direct-viewing endoscopic image and a side-viewing endoscopic image, which are image-processed by the image sensor through the endoscope optical adapter, and are image-processed. The endoscope optical adapter is provided with brightness adjusting means for appropriately adjusting the display brightness of the direct-viewing endoscopic image and the side-viewing endoscopic image displayed on the display device.

The brightness adjusting means adjusts the quantity of emitted light emitted from the illumination lenses of the direct-view illumination optical system and the side-view illumination optical system.
Alternatively, it is an incident light amount adjusting means provided in the direct-viewing objective optical system and the side-viewing objective optical system for optimizing the incident light amount incident on the image pickup device.

According to such a configuration, by mounting the optical adapter for an endoscope on the distal end portion of the endoscope, optimized illumination is emitted from each illumination window toward each observation site. The direct-viewing endoscopic image and the side-viewing endoscopic image with appropriate brightness are displayed on the screen of the display device. Alternatively, by attaching the endoscope optical adapter to the tip of the endoscope, the reflected light reflected at each observation site is optimized and enters the image sensor, and the brightness on the screen of the display device is appropriate. A direct-viewing endoscopic image and a side-viewing endoscopic image are displayed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be specifically described below with reference to the drawings. 1 to 11 relate to an embodiment of the present invention, FIG. 1 is an external view for explaining the configuration of an endoscope device, and FIG. 2 is a diagram for explaining the configurations of an optical adapter for an endoscope and a tip portion main body. Yes, in particular, a cross-sectional view showing the configurations of the direct-viewing objective optical system and the side-viewing objective optical system, and FIG. 3 is a view for explaining the configurations of the optical adapter for the endoscope and the main body of the distal end portion. FIG. 4 is a cross-sectional view showing the configuration of an optical system, and FIG. 4 is a cross-sectional view showing the configuration of an endoscope optical adapter and a tip portion main body, and particularly showing the configurations of a side-view bright optical system and a side-view objective optical system 5 is a sectional view taken along the line AA of FIG. 4, FIG. 6 is a sectional view taken along the line BB of FIG. 4, and FIG.
FIG. 8 is a sectional view taken along line C, showing an illumination range of illumination light emitted from the direct-view illumination lens and an illumination range of illumination light emitted from the side-view illumination lens when setting the ratio of the number of light guide fibers. FIG. 9 is a diagram illustrating a display example of a display device, FIG. 10 is a diagram illustrating another configuration of the emitted light amount adjusting unit, and FIG. 11 is a diagram illustrating another configuration of the brightness adjusting unit. .

FIG. 10A shows the amount of illumination light emitted from the direct-view illumination lens and the amount of illumination light emitted from the side-view illumination lens by changing the transmittance of the illumination lens. FIG. 10B is a diagram showing a configuration for changing the radius of curvature of the illumination lens, and the amount of illumination light emitted from the direct-view illumination lens and the amount of illumination light emitted from the side-view illumination lens. It is a figure which shows the structure which changes and.

As shown in FIG. 1, an endoscope apparatus 1 according to the present embodiment includes an industrial endoscope 2 (hereinafter, abbreviated as an endoscope) 2 having an elongated insertion portion 2a having flexibility. This endoscope 2
Drum part 3 for winding up the insertion part 2a of the peripheral part 3a
A frame portion 4 for holding the drum portion 3 in a rotatable state; a front panel 5 provided at the upper end of the frame portion 4 and provided with various switches and connectors and an air supply / exhaust duct; Cable 6c on panel 5
A bending lever 6a and a power ON button 6b that are operated when bending a bending portion described later that is detachably connected via the
A remote controller (hereinafter referred to as a remote controller) 6 provided with various switches, a monitor 7 which is a display device rotatably supported by a telescopic pole, and a cushioning material for suppressing an impact force applied to the stored equipment. A storage case 8 provided with the front panel 5 and connected to the front panel 5 for supplying commercial power A
The C cable 5a and the distal end portion of the insertion portion 2a of the endoscope 2 are detachably attached to change the viewing direction and viewing angle,
Alternatively, it is mainly configured with an endoscope optical adapter (hereinafter, abbreviated as a tip optical adapter) 9 that converts optical characteristics so that two viewing directions can be observed.

The storage case 8 has a box body 8a forming a case body and a lid body 8 for closing an opening of the box body 8a.
and b. Further, the distal end optical adapter 9 of the present embodiment is capable of observing two visual field directions, that is, a direct view direction and a side view direction.

The insertion portion 2a of the endoscope 2 extends from the front panel 5 via a buckling preventing rubber member 5b. The insertion portion 2a includes a rigid tip body 11 that is a tip portion in order from the tip side, a bendable portion 12 that bends the tip body 11 in a desired direction, and an elongated flexible tube. It is configured by connecting the portions 13 in series.

Inside the space of the drum section 3, a light source section 14 for supplying illumination light to a light guide (reference numeral 21 to be described later) which is an illumination light transmission means of the endoscope 2, and the endoscope insertion section. CCU 1 for performing signal processing on an image sensor (reference numeral 24, which will be described later) provided on the tip end main body 11 of 2a.
5, an electric bending device 16 including a drive mechanism for electrically bending the bending portion 12 of the endoscope insertion portion 2a, and a drive control of the electric bending device 16 based on an operation instruction signal from the remote controller 6. Then, an electric bending circuit portion 17 for controlling the bending state of the bending portion 12 is housed.

The front optical adapter 9 has a direct-viewing illumination lens 41 that emits illumination light that illuminates the direct-viewing direction and a direct-viewing objective lens 51 that captures an optical image of an observation site in the direct-viewing direction.
And a side-viewing illumination lens 61 that emits illumination light that illuminates the side-viewing direction and a side-viewing objective lens 71 that captures an optical image of an observation site in the side-viewing direction. It is configured to be detachably attached to the tip end body 11 by a rotatable set screw 99.

Here, the structure of the distal end body 11 of the endoscope 2 to which the distal end optical adapter 9 is attached will be described. Figure 2
As shown in FIG. 4, a light guide 21 for transmitting illumination light is inserted and disposed in the insertion portion 2a of the endoscope 2, and the tip end of the light guide 21 is a predetermined portion of the tip end body 11. The light source unit 14 is disposed at the position
It is fixed to.

The tip end main body 11 is provided with an image pickup unit 22 adjacent to the light guide 21. At the image forming position of the objective optical system 23 constituting the image pickup unit 22, for example, a charge coupled device (hereinafter,
24) is arranged, and this CCD
A signal line (not shown) extending from 24 is connected to the CCU 15 in the drum unit 3. This CCU15
Generates a standard video signal from the image signal photoelectrically converted by the CCD 24 and outputs it to the monitor 7. As a result, the endoscopic image of the observation site formed on the CCD 24 is displayed on the screen of the monitor 7.

Next, the structure of the tip optical adapter 9 which can be attached to and detached from the tip body 11 will be described. As shown in FIGS. 2 to 4, the distal end optical adapter 9 is mainly composed of an adapter body 91 and a cover 92, and the cover 92 and the adapter body 91 are integrally constructed by screws 93, for example. . The cover 92 is composed of a front cover 92f and a rear cover 92b, and is integrally fixed in a watertight manner by, for example, bonding.

In the tip optical adapter 9 of this embodiment, the endoscope 2 is used to form optical images of two observation regions on the image pickup surface of one CCD 24 built in the tip body 11. A direct-view illumination optical system 40 and a direct-view objective optical system 50 corresponding to the observation in the forward direction parallel to the longitudinal axis direction of
A side-view illumination optical system 60 and a side-view objective optical system 70 corresponding to observation in a direction orthogonal to the axial direction are provided.

First, the structures of the objective optical systems 50 and 70 will be described. The direct-view objective optical system 50 includes the direct-view objective lens 51, a first lot lens 52, and two second lot lenses 53, 53 having a smaller diameter than the first lot lens 52.
And a flare diaphragm 54 arranged between the second lot lenses 53, and a relay lens group 56 formed by arranging a plurality of optical lenses 55, ..., 55. On the other hand, the side-view objective optical system 70 includes the side-view objective lens 71, a first prism 72a, and a second prism 72b.
And the relay lens group 56.

Therefore, the observation image incident through the direct-viewing objective lens 51 is the first lot lens 52, the second lot lens 52.
A direct-view optical image is formed at a predetermined position on the image pickup surface of the CCD 24 through the lot lens 53, the flare diaphragm 54, the second lot lens 53, the relay lens group 56, and the objective optical system 23 of the endoscope 2. On the other hand, the sensed image that has entered through the side-viewing objective lens 71 is the first prism 72.
a, the second prism 72b, the relay lens group 56, and the objective optical system 23 of the endoscope 2 through the CCD 24
The image is formed as a side-view optical image at a predetermined position on the image pickup surface. Then, the direct-view optical image and the side-view optical image formed on the CCD 24 are converted into electric signals and then generated into video signals by the CCU 15, and the direct-view endoscope image and the side-view endoscope are displayed on the screen of the monitor 7. The image and are displayed at the same time.

Incidentally, the base end cover lens 55e constituting the relay lens group 56 is formed to have a larger diameter than the other optical lenses 55, ..., 55 in order to make the inside of the distal end optical adapter 9 watertight. .

Further, the first lot lens 52 and the second lot lens 53 constituting the direct-viewing objective optical system 50 preferably have a large diameter dimension in order to secure as much peripheral light amount as possible. When the space or the like is limited, the diameter of the second lot lens 53 is set smaller than that of the first lot lens 52 as shown in the figure.

Further, since the second lot lens 53 is formed in the same shape and the flare diaphragm 54 having a predetermined shape is arranged between the second lot lenses 53, the light reflected on the inner surface of the rod lens is formed. This prevents flare from occurring and prevents misassembly.

Next, the structure of the illumination optical systems 40 and 60 will be described. The illumination optical systems 40 and 60 of the present embodiment are provided with emitted light amount adjusting means which is brightness adjusting means.

The direct-view illumination optical system 40 includes the direct-view illumination lens 41 and a direct-view light guide 42 serving as a means for adjusting the amount of emitted light that is exposed to the base end surface of the direct-view illumination lens 41.
It consists of and. The base end surface of the direct-view light guide 42 faces the front end surface of the light guide 21.

On the other hand, the side-view illumination optical system 60 includes the side-view illumination lens 61 and the side-view light guide 6 serving as a means for adjusting the amount of emitted light that is exposed to the base end surface of the side-view illumination lens 61.
It is composed of 2 and. This side-view light guide 62 is
A bent portion 63 is formed midway, and the base end surface of the side-view light guide 62 faces the tip end surface of the light guide 21.

That is, the base end surfaces of the direct-view light guide 42 and the side-view light guide 62 are arranged on the tip end surface of the light guide 21 in a mutually facing positional relationship.

Now, the relationship between the direct-view light guide 42 and the side-view light guide 62 will be described with reference to FIGS. As shown in FIG. 5, the tip end optical adapter 9 of this embodiment is provided with an adapter side light guide 80.
Then, one end portion side (tip end side) of the adapter side light guide 80 is divided into two, and the direct-view light guide 4 is divided.
2 and the side-view light guide 62 are provided. That is, the direct-view light guide 42 and the side-view light guide 62.
The base end surface of the adapter-side light guide 80 in which the base end sides of and are grouped together faces the tip end surface of the light guide 21.

The adapter side light guide 80 is divided into the direct view light guide 42 and the side view light guide 62.
And the number of light guide fibers of the direct-view light guide 42 and the number of light guide fibers of the side-view light guide 62, based on the difference in the distance to the observation target site. For example, 7: 3
Or at a ratio of 6: 4 or 5.5: 4.5. That is, the amount of emitted light is changed by changing the ratio of the number of light guide fibers of the direct-view light guide 42 and the side-view light guide 62.

Then, the light guide fibers divided into a predetermined ratio are collected as shown in FIG.
The direct-view light guide 42 and the side-view light guide 62 having different diameters are configured to guide the direct-view light guide 42 to the direct-view illumination lens 41 as shown in FIG. 7, and the side-view light guide 62 forms a bent portion 63. After that, it is guided to the side-view illumination lens 61.

The brightness of the direct-view endoscope image displayed on the screen of the monitor 7 and the side-view internal guide when the ratio of the number of the light guide fibers of each of the direct-view light guide 42 and the side-view light guide 62 is set. It is set so that the brightness of the mirror image is suitable for observation together.

At this time, as compared with the amount of light emitted from the direct-view illumination lens 41 toward the distance as shown in FIG. 8, the light is emitted from the side-view illumination lens 61 and positioned closer as shown by the solid line. The ratio of the number of light guide fibers of the direct-view light guide 42 to the number of light guide fibers of the side-view light guide 62 is set to, for example, 7: 3 so that the amount of light emitted toward the wall surface 88 becomes dark. As a result, the amount of light emitted from the direct-view illumination lens 41 becomes brighter than the amount of light emitted from the side-view illumination lens 61.

Therefore, the brightness of the distant place illuminated by the illumination light emitted from the direct-view illumination lens 41 and the brightness of the nearby wall surface 88 illuminated by the illumination light emitted from the side-view illumination lens 61 are substantially the same. Adjusted to brightness.

The side-view illumination lens 61, such as the wall surface 88a shown by the one-dot chain line and the wall surface 88b shown by the two-dot chain line, is shown.
The number of light guide fibers (Nd) of the direct-view light guide 42 corresponds to the respective pipe diameters under different usage conditions in which the distance from the wall surface 88a to the wall surface 88b is different.
And the ratio of the number of light guide fibers (Ns) of the side-view light guide 62 to Nd ≧ Ns, such as 6: 4 or 5.5: 4.5.

Reference numeral 94 denotes a light guide disposing recess provided in the front cover 92f. By forming this light guide disposing recess 94, a sufficient brightness can be obtained without reducing the number of light guide fibers. It is possible to dispose the direct-view light guide 42 that secures.

The cover 92 is replaced by a front cover 92f.
And a rear cover 92b integrally fixed to the adapter body 91
By configuring separately with and, the tip optical adapter 9
It is possible to easily secure the water-tight structure and provide the light guide disposing recess 94. Further, reference numeral 59
Is a lens frame of which a part is cut off, and is arranged so as to prevent leakage of illumination light transmitted through the side-view light guides 62 arranged at adjacent positions from entering the direct-view objective optical system 50. ing. Further, reference numeral 95 is a rotation stopping flat surface which is provided at the tip of the rear cover 92b and which prevents rotation with the adapter body 91.

The tip optical adapter 9 constructed as described above.
The action of will be explained. First, in consideration of the diameter dimension of the insertion portion 2a and the inner diameter dimension of the pipe to be observed, the tip portion main body 1
The tip optical adapter 9 to be attached to 1 is selected, and the tip optical adapter 9 is attached to the tip body 11.

Next, the illumination light is supplied to the endoscope 2, and the insertion portion 2a with the tip optical adapter 9 attached is inserted into the pipe. Then, illumination light with a predetermined brightness having different emission light amounts is emitted toward the respective observation sites through the direct-view illumination lens 41 and the side-view illumination lens 61 of the distal end optical adapter 9.

As a result, as shown in FIG. 9, on the screen of the monitor 7, the C lens is passed through the direct-viewing objective lens 51.
The direct-viewing endoscope image 7a showing the front side of the pipe captured by the CD 24 and the CCD 2 through the side-viewing objective lens 71.
Side-viewing endoscopic image 7 showing the pipe wall surface 88 imaged at 4
b and b are displayed with appropriate brightness. As a result, the direct-viewing endoscopic image 7a and the side-viewing endoscopic image 7b having the optimum brightness can be simultaneously observed on the screen of the monitor 7.

As described above, the brightness adjusting means for adjusting the brightness of the direct-viewing endoscopic image and the side-viewing endoscopic image displayed on the screen of the monitor to appropriate brightness is used as the light quantity adjusting means. The light quantity adjusting means is a light guide that guides the illumination light toward the respective illumination lenses in the tip optical adapter, and the number of light guide fibers (Nd) of the direct-view light guide and the number of light guide fibers (Ns) of the side-view light guide are used.
And the ratio of Nd ≧ Ns are set so that the amount of light emitted from the direct-view illumination lens and the amount of light emitted from the side-view illumination lens are adjusted to an optimum state for observation. You can As a result, the direct-viewing endoscopic image and the side-viewing endoscopic image with appropriate brightness are displayed on the display device, and simultaneous observation can be performed.

It should be noted that the relationship of Nd ≧ Ns is set between the number of light guide fibers (Nd) of the direct-view illumination optical system 40 and the number of light guide fibers (Ns) of the side-view illumination optical system 60 to establish direct-view illumination. Instead of using the emitted light amount adjusting means for changing the emitted light amount of the illumination light emitted from the lens 41 and the emitted light amount of the illumination light emitted from the side-view illumination lens 61, as shown in FIG. The transmittance (T of the direct-view illumination lens 41A forming the illumination optical system 40
The illumination light emitted from the direct-view illumination lens 41A by setting the relationship of Td ≧ Ts between d) and the transmittance (Ts) of the side-view illumination lens 61A that constitutes the side-view illumination optical system 60. The emitted light amount adjusting means for changing the emitted light amount and the emitted light amount of the illumination light emitted from the side-view illumination lens 61A may be used. That is, the side-view illumination lens 61A is made of, for example, frosted glass or the like having a low transmittance, for example, a roughened portion 65 provided on the inner surface. As a result, the side-view illumination lens 6
The amount of illumination light emitted from 1A is reduced, and the same operation and effect as described above can be obtained.

The curvature (Rd) of the direct-view illumination lens 41B that constitutes the direct-view illumination optical system 40 and the radius of curvature (Rd) of the side-view illumination lens 61B that constitutes the side-view illumination optical system 60.
Ss), the relation of Rs ≧ Rd is set to change the emission light amount of the illumination light emitted from the direct-view illumination lens 41B and the emission light amount of the illumination light emitted from the side-view illumination lens 61B. In this way, the emitted light amount adjusting means may be used. That is, by setting the radius of curvature of the side-view illumination lens 61B larger than the radius of curvature of the direct-view illumination lens 41B, the illumination light is diffused and emitted from the side-view illumination lens 61B. The action and effect of can be obtained.

Further, the number of light guide fibers, the transmittance of the illumination lenses 41A and 61A, or the illumination lens 4 is used.
By changing the illumination optical systems 40 and 60 such as the radii of curvature of 1B and 61B, that is, the emitted light amount adjusting means is changed to the illumination optical system 4.
Instead of providing the direct-viewing endoscopic image 7a and the side-viewing endoscopic image 7b with appropriate brightness on the screen of the monitor 0 and 60 so that both images can be simultaneously observed, 11
As shown in FIG. 3, a direct-view objective optical system 50 is provided with a diaphragm 58 having a predetermined F number (Fd) as an incident light amount adjusting means, and a side-view objective optical system 70 is a diaphragm having a predetermined F number (Fs) as an incident light amount adjusting means. By disposing 78 and setting a relationship of Fs ≧ Fd between Fs and Fd, the incident light amount incident on the image sensor 24 through the direct-viewing objective optical system 50 and the side-viewing objective optical system 70 is optimized, The same operation and effect as described above can be obtained.

By the way, when the light guides 42 and 62 are arranged at predetermined positions of the adapter body 91, the jig 100 shown in FIG. 12 is used. FIG. 12 is a trihedral view for explaining the structure of the jig, and the jig 100 will be described with reference to these drawings.

The jig 100 includes a scope dummy portion 101 in which a screw portion with which the set screw 99 is screwed is formed in the shape of the tip end main body 11, and the scope dummy portion 101.
Adapter side light guide base end face positioning member (hereinafter referred to as the first
(Abbreviated as a positioning member) 102, and a light guide tip surface positioning member (hereinafter referred to as a second positioning member) 103 which is integrally fixed by a screw 93 to an adapter main body 91 arranged on the first positioning member 102 by the set screw 99.
And a side-view light guide tip end positioning member (hereinafter, referred to as a third positioning member) that is a cylindrical shape that is engaged with the second positioning member and has an outer peripheral surface that serves as a positioning surface of the tip end of the side-view light guide 62. ) 104 and.

A first contact surface 102a is formed at a predetermined position of the first positioning member 102 so that the base end surface of the adapter side light guide 80 is brought into contact with and positioned. Further, the positioning corner portion 10 for positioning the second positioning member 103 by contacting two positions on the peripheral surface of the front end portion of the direct-view light guide 42 set to a predetermined length dimension.
A cutout portion 103b forming 3a and a second contact surface 103c for contacting the tip end surface of the side-view light guide 62 set to a predetermined length dimension are formed.

Therefore, the adapter-side light guide 80, which is formed by dividing the direct-view light guide 42 and the side-view light guide 62, which are formed to have a predetermined length, is provided with the scope dummy portion 101, the first positioning member 102, and the second positioning member 102. The direct-view light guide 42 and the side-view light guide 42 are arranged by arranging the positioning member 103 and the third positioning member 104 on an integrally configured jig 100, aligning predetermined portions, and then applying and bonding an adhesive. The adapter-side light guide 80 having 62 is integrally bonded and fixed to a predetermined position of the adapter body 91.

As described above, by using the jig, the adapter-side light guide can be securely bonded and fixed to a predetermined position of the adapter body.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the spirit of the invention.

[Additional Notes] According to the above-described embodiment of the present invention described in detail above, the following configuration can be obtained.

(1) An endoscope having a built-in image pickup device, and a direct-view illumination optical system and a direct-view objective optical system, a side-view illumination optical system, and a side-view objective optical system that are detachably attached to the tip of the endoscope. An endoscope including an endoscope optical adapter and a monitor 7 for displaying a direct-viewing endoscope image and a side-viewing endoscope image which are image-processed and image-processed by the image pickup device through the endoscope optical adapter. In the endoscopic device, the endoscope optical adapter is provided with brightness adjusting means for appropriately adjusting display brightness of the direct-viewing endoscopic image and the side-viewing endoscopic image displayed on the monitor 7. Endoscope device.

(2) The brightness adjusting means is an emitting light quantity adjusting means provided in the direct-view illumination optical system and the side-view illumination optical system for optimizing the emitted light quantity emitted from each illumination lens. The endoscope apparatus according to 1.

(3) The emitted light quantity adjusting means is a light guide fiber which constitutes an illumination optical system, and includes the number of light guide fibers (Nd) of the direct-view illumination optical system and the number of light guide fibers of the side-view illumination optical system ( Ns) and Nd
The endoscope apparatus according to appendix 2, wherein a relationship of ≧ Ns is set.

(4) The emitted light quantity adjusting means is an illumination lens that constitutes an illumination optical system, and the transmittance (Td) of the illumination lens that constitutes the direct-view illumination optical system and the illumination that constitutes the side-view illumination optical system. The endoscope apparatus according to appendix 2, wherein a relationship of Td ≧ Ts is set with respect to the transmittance (Ts) of the lens.

(5) The emitted light quantity adjusting means is an illumination lens that constitutes an illumination optical system, and the curvature (Rd) of the illumination lens that constitutes the direct-view illumination optical system and the illumination lens that constitutes the side-view illumination optical system. The endoscopic device according to appendix 2, wherein a relation of Rs ≧ Rd is set between the radius of curvature (Rs) and Rs ≧ Rd.

(6) The brightness adjusting means is an incident light quantity adjusting means for optimizing an incident light quantity incident on the image pickup device provided in the direct-view objective optical system and the side-view objective optical system. Endoscope device.

(7) The incident light amount adjusting means is a diaphragm which constitutes the objective optical system, and the F number (Fd) of the diaphragm which constitutes the direct-viewing objective optical system and the F-number of the diaphragm which constitutes the side-viewing objective optical system. The endoscope apparatus according to appendix 2, wherein a relationship of Fs ≧ Fd is set between the number and the number (Fs).

[0061]

As described above, according to the present invention, by mounting the optical adapter for the endoscope, the direct-viewing endoscopic image and the side view which are adjusted to the proper brightness on the screen of the display device. It is possible to provide an endoscopic device capable of displaying both endoscopic images and observing both images at the same time.

[Brief description of drawings]

FIG. 1 to FIG. 11 relate to one embodiment of the present invention, and FIG. 1 is an external view illustrating a configuration of an endoscope device.

FIG. 2 is a cross-sectional view for explaining the configurations of an endoscope optical adapter and a tip portion main body, and particularly showing the configurations of a direct-viewing objective optical system and a side-viewing objective optical system.

FIG. 3 is a cross-sectional view for explaining the configurations of an optical adapter for an endoscope and a main body of a distal end portion, and particularly showing a configuration of a direct illumination optical system and a direct-viewing objective optical system.

FIG. 4 is a cross-sectional view illustrating the configurations of an optical adapter for an endoscope and a tip portion main body, and particularly showing the configurations of a side-view bright optical system and a side-view objective optical system.

5 is a sectional view taken along line AA of FIG.

6 is a sectional view taken along line BB of FIG.

7 is a sectional view taken along line CC of FIG.

FIG. 8 is a diagram illustrating an illumination range of illumination light emitted from the direct-view illumination lens and an illumination range of illumination light emitted from the side-view illumination lens when setting the ratio of the number of light guide fibers.

FIG. 9 is a diagram illustrating a display example of a display device.

FIG. 10 is a diagram for explaining another configuration of the emitted light amount adjusting means.

FIG. 11 is a diagram illustrating another configuration of the brightness adjusting unit.

FIG. 12 is a three-sided view illustrating the configuration of a jig.

[Explanation of symbols]

9 ... Endoscope optical adapter (tip optical adapter) 24 ... CCD 40 ... Direct-view illumination optical system 41 ... Illumination lens for direct view 42 ... Direct light guide 50 ... Direct-viewing objective optical system 51 ... Objective lens for direct view 56 ... Relay lens group 60 ... Side-view illumination optical system 61 ... Side view illumination lens 62 ... Side-view light guide 70 ... Side-view objective optical system 71 ... Objective lens for side view

Claims (3)

[Claims] 1. An endoscope having an imaging device, and an endoscope having a direct-viewing illumination optical system and a direct-viewing objective optical system, a side-viewing illumination optical system, and a side-viewing objective optical system that are detachably attached to a distal end portion of the endoscope. An endoscope comprising an optical adapter for a mirror and a display device for simultaneously displaying a direct-viewing endoscopic image and a side-viewing endoscopic image which are image-processed by the image pickup device through the optical adapter for an endoscope and which are image-processed. In the endoscopic device, the endoscope optical adapter is provided with brightness adjusting means for appropriately adjusting display brightness of the direct-viewing endoscopic image and the side-viewing endoscopic image displayed on the display device. An endoscopic device characterized by: 2. The brightness adjusting means is an outgoing light quantity adjusting means for optimizing the outgoing light quantity emitted from each of the illumination lenses of the direct-view illumination optical system and the side-view illumination optical system. The endoscope apparatus according to 1. 3. The brightness adjusting means is an incident light amount adjusting means provided in the direct-viewing objective optical system and the side-viewing objective optical system for optimizing an incident light amount incident on the image pickup device. The endoscope apparatus according to claim 1.