JPS6088924A - Endoscope device - Google Patents

Abstract

PURPOSE:To take a straight and a sideward view simultaneously or selectively by constituting two solid-state image pickup elements back to back in one body and arranging two optical systems at the photodetection surface side of each solid-state image pickup element. CONSTITUTION:Two solid-state image pickup elements 3 and 4 constituted in one body with a frame body 2 so that their rear surface sides face each other are arranged in a tip constitution part 1, and their photodetection surfaces face in opposite directions. A straight view objective lens 5 is arranged at the photodetection surface side of the solid-state image pickup element 3 with the optical axes aligned with each other. Further, a mirror 6 slanting to the optical axis is arranged at the photodetection surface side of the solid-state image pickup element 4. When illumination light is guided through a straight view light guide 9 and a sideward view light guide 10, reflected light from an object is photodetected directly by the solid-state image pickup element 3 through the direct view objective lens 5 while reflected by the mirror 6 through a sideward view objective lens 8 and photodetected by the solid-state image pickup element 4. Photodetected straight view and sideward view images are processed and projected on either TV monitor at the same time.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to an endoscope device, and in particular, an endoscope device equipped with a solid-state image sensor,
This invention relates to an interior isa position that is configured to allow easy direct viewing and side viewing, and is designed to be compact.

[Technical Background and Problems] Endoscopes are generally used to observe the inside of a living body cavity or a cavity such as a mechanical component.

Conventionally, in such endoscopes, optical fiber bundles cover l! The image of the object to be observed is led out of the living body cavity or out of the observation cavity, and the optical image formed on the output end face of the optical fiber is observed through an eyepiece system. Separately, a solid-state imaging device such as a charge-coupled device (hereinafter referred to as COD) is installed at the tip of the shaft of the endoscope instead of the optical fiber described above, and light is formed on the light-receiving surface of the solid-state imaging device. After converting the optical image into an electrical signal and leading it out of the body cavity or cavity through a signal line, and performing the necessary signal processing,
The equipment that displays the image on the television monitor has already been opened. In such endoscopes, the light source device for illuminating the object to be observed is usually installed externally, and the light from this device is passed through the light source connection of the endoscope and the guide to the tip of the endoscope insertion section. It is configured to guide the sword.

By the way, in the latter method of monitoring captured images using a solid-state image sensor, when direct viewing and side viewing are performed, there are fixed image elements for direct viewing and side viewing in the distal end component of the endoscope insertion section. Either it must be installed as a separate unit, or a single solid-state b'i image element must be movably installed and moved to a direct viewing or side viewing position for photographing.

For this reason, extra space is required within the distal end component of the endoscope, which has been an obstacle to miniaturization.

[Purpose of Ji Ming] In view of the above-mentioned points, the present invention provides direct observation using an endoscope,
An object of the present invention is to provide an endoscope device in which a distal end component of an endoscope insertion portion is configured to be compact when side viewing is performed, and direct viewing and side viewing can be performed simultaneously or selectively.

[Summary of the Invention] The endoscope device of the present invention has two solid-state imaging devices integrally arranged back to back, and two optical systems are disposed on the light-receiving surface side of each solid-state imaging device for direct viewing, for example.

This allows side vision to be performed simultaneously or selectively.

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

FIG. 1 is a sectional view showing a first embodiment of a distal end component of an endoscope apparatus according to the present invention. In this figure, reference numeral 1 indicates the distal end component of the endoscope insertion section, and inside the distal end component 1 there are two solid-state imaging devices 3 integrally constructed with their back sides facing each other in a frame 2. .4 is installed. Therefore, the light-receiving surfaces of the two solid-state image sensors 3.4 face in opposite directions. A direct viewing objective lens 5 is disposed with its optical axis aligned with the light receiving surface side of the solid-state l1l (11 elements 3), and a direct viewing objective lens 5 is disposed on the light receiving surface side of the solid-state image carrier 4 with its optical axis aligned with the optical axis.
A mirror 6 inclined at an angle of 5° is provided, and incident light enters the mirror 6 through a side viewing window 7a provided on the side surface of the tip component 1 and an objective lens 8, and is reflected at an angle of 90°. The light is received by the solid-state m11A element 4. Furthermore, within the distal end component 1, a light guide 9 for illuminating for direct viewing is disposed in the axial direction of the endoscope insertion section, and a light guide 10 for illuminating for side viewing is disposed in the axial direction of the endoscope insertion section. It is arranged in the direction toward the window 7b. light guide 9
, 10 are composed of optical fibers (m optical fibers), etc. The direct-view image and side-view image received by each solid-state image sensor 3.4 are photoelectrically converted and input to each signal processing circuit (not shown), and then displayed simultaneously or selectively on a television monitor (not shown). It is now displayed as

In such a configuration, when the endoscope insertion section is inserted into a living body cavity or cavity and illumination light is irradiated from the direct viewing light guide 9 and the side viewing light guide 10 of the distal end component 1, the object is exposed to light. The reflected light from the vl object passes through the direct viewing objective lens 5 and is directly received by the solid-state image element 3, and at the same time passes through the side viewing objective lens 8 and is reflected by the mirror 6 (solid-state mfm element 4).
light is received by the

Solid i! The direct-view image and the side-view image received by the IM elements 3 and 4 are each subjected to signal processing as described above, and are displayed in the rear direction, particularly on a television monitor. In this case, either the direct view image or the side view image can be projected by switching the input or output of the signal processing circuit to the direct view side or the side view side.

FIG. 2 is a cross-sectional view showing a second practical example of the tip component.

This embodiment uses a solid-state image sensor 3 which is integrated into a frame 2 with its light-receiving surfaces facing in opposite directions as described above.
The light-receiving surface side of 4 is opposite to the case shown in FIG.
The light passing through the direct viewing objective lens 5 is directed by a mirror 6 tilted at an angle of 45 degrees with respect to the optical axis to change the direction of the light by 90 degrees to the solid R (1 Element 3
The solid-state image sensor 4 is configured to receive light incident through the side viewing window 7a and the objective lens 8. Similar to FIG. 1, a direct viewing light guide 9 is disposed in the axial direction within the tip component 1, and a side viewing window 7 is provided.
A side-viewing light guide 10 is disposed toward the direction b.

The above operation is exactly the same as that shown in FIG.

Figure 3 shows the solid-state image sensors 3 and 4 shown in Figures 1 and 2.
FIG. 3 is a perspective view showing another example of the configuration.

In this configuration, the two solid-state m-image elements 3.4 are configured with their light-receiving surfaces facing in opposite directions, as in the case shown in FIGS. 1 and 2; 3
．． 4 is integrally constructed, a light guide 11 such as an optical fiber is sandwiched between the back surfaces of these element bodies 3.4.

Then, one side of the integrated solid-state image sensors 3 and 4 is used as the light emitting end surface 11a of the light guide 11, or the light guide 11 is extended and the light emitting end surface 11a is arranged, and the light emitting end surface 11a is arranged opposite to the emitting end surface 11a. The light guide 11 is drawn out from the side to form an incident end surface 11b.

4 and 5 are cross-sectional views showing a third example and a fourth embodiment of the tip structure 1 constructed using the apparatus shown in FIG. 3.

FIG. 4 shows a side view image using the apparatus shown in FIG. 3, objective lenses 12 and 13, and mirrors 14 and 15. J! The distal end portion 1 has a curved end RJ1 closed, and side viewing windows 16a, 16Lz16G are formed on the outer peripheral side surface. In this case, the light emitting end surface 11 is directed toward the window portion 1611 side.
The device shown in FIG. 3 is arranged so that a is facing, and the two solid-state image sensors 3 and 4 are placed on the light-receiving surface side at a distance of 45 mm from the light-receiving surface.
A mirror 14.15 tilted at an angle of ° is arranged, and an objective lens 12.13 is arranged near the windows 16a, 16c, so that the light incident through the windows 15a, 16c is focused by the objective lens 12.13. The light enters the mirrors 14 and 15, and the light reflected by each mirror is transmitted to two solid-state image sensors 3.
The light is received at the same time. The optical images received by the solid-state image sensor 3.4 are each photoelectrically converted, and the solid-state l1iI! The signals are processed by signal processing means corresponding to the elements 3 and 4, and are displayed simultaneously or selectively on a display means such as a television monitor. FIG. 5 shows the solid-state AM element 3.4 shown in FIG. 4, and the objective lens 12.13 and mirror 14.1 arranged correspondingly.
5 is oriented toward the distal end direction (axial direction) of the distal end component 1, and an internal PAM for direct viewing is constructed. In addition, the above 3. In the fourth embodiment, two solid-state R image elements 3.
4 receives optical images from the same direction, so they can be displayed three-dimensionally by superimposing both optical images simultaneously on a monitor, or can be displayed individually by switching. Furthermore, by using lenses with different magnifications as the objective lenses 12 and 13,
One of the Akira images can be enlarged and displayed, and one of the objective lenses 12 and 13 can be configured as a wide-angle lens to enable observation over a wide range.

In the first to fourth embodiments described above, the electric signals converted by the solid-state single-image elements 3 and 4 integrated as described above are processed, and two captured images are simultaneously displayed separately on the same monitor. It can also be configured to switch so that only one captured image is selected and displayed on the same monitor, or it can be configured to display on two monitors simultaneously or selectively on one of them. It may be configured to do so.

FIG. 6 shows an example of a medical endoscope device to which the internal function of the present invention is applied.
7 is inserted, and the distal end component 1 includes the aforementioned solid-state AM elements 3 and 4. Signal lines are led out from the two solid-state image sensors 3 and 4 through the insertion section 17 to the endoscope operating section 18, and each solid-state image sensor 3.4
The electrical signal converted by
After performing I III and necessary signal processing, the signal is sent to a monitor section 22 connected to a pedestal section 20 placed on the bed by a flexible flexible tube 2'1, and displayed. In the above case, the pedestal section 20 can be installed on the bed or on a frame or wall near the bed. For example, when the insertion section 17 is inserted from the oral cavity as shown in the figure, the monitor section 22 may be placed near the subject's head so that the operator can monitor the subject during the examination or observation. The observation site can be inspected while looking at the person's facial expression.For example, when inserting the insertion section 17 into a treatment site in the abdomen, the monitor section 22 is placed near the abdomen and the same treatment as described above is performed. The treatment area can be monitored while the treatment is being performed.

[Effects of Bimei As mentioned above, the present invention has two solid ta &
The elements are integrally constructed with their back surfaces facing each other, and this component is disposed within the distal end component of the endoscope insertion section, and each solid body 1? l
Since the optical system is arranged on the light-receiving surface side of the I element so that two captured images can be displayed simultaneously or selectively, it is possible to construct an endoscope device for both direct viewing and side viewing in a compact size. By electrical switching, it is possible to easily combine the imaging systems so that only one of the imaging systems operates.

[Brief explanation of drawings]

FIG. 1 is a sectional view showing a first embodiment of the distal end component of an endoscope H device according to the present invention, FIG. 2 is a sectional view showing a second embodiment of the distal end component, and FIG. 3 is an integrated information structure. FIG. 4 is a sectional view showing a third embodiment of the tip structure, FIG. 5 is a sectional view showing a fourth embodiment of the tip structure, and FIG. The figure is a perspective view showing an example of a medical application of the internal pA mirror device of the present invention. 1...Tip pair 2...Frame 3.4...Solid image carrier 5.8.12.13...Objective lens 6.14.15...Mirror 17...Insertion part Figure 1 Figure 2 Figure 3 Figure 6 Figure 2 17 old

Claims (1)

[Claims] Two solid-state image sensors are integrated into the tip structure of the endoscope insertion section with their back sides facing each other, and an optical image from the object to be observed is formed on the light-receiving surface of each solid-state image sensor. The invention is characterized in that it is configured to include two optical systems for the purpose of image sensing, and to simultaneously or selectively display two observed images based on electrical signals converted by the two solid-state image sensors. l li @place.