JPH0134053B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an adapter for an endoscope viewing device that allows monitoring with a television device.

Generally, when observing the inside of a body cavity using an endoscope, it may be necessary for multiple operators to observe at the same time, in which case an adapter for viewing device is attached to the eyepiece of the endoscope. , the observed image is monitored on a television device.

Conventionally, in order to view an observation image, a light splitting optical system was provided in the adapter, and the light signal from the endoscope was split into two by this light splitting optical system. Then, one optical signal is formed into an image by an eyepiece and observed at the eyepiece, and the other optical signal is incident on a solid-state image sensor, which converts it into an electrical signal and displays it on a television device. That's what I was doing.

However, with this configuration, the optical signal from the endoscope is split into two by the light splitting optical system, so the amount of light incident on the solid-state image sensor is reduced, and images with good S/N can be displayed on the TV. There was a problem that it was not displayed on the device and was difficult to observe. Therefore,
By increasing the amount of light incident on the solid-state image sensor,
Since the amount of light to the eyepiece system is reduced, the image observed at the eyepiece becomes dark, resulting in a problem in that good observation cannot be performed here.

That is, conventionally, it has not been possible to obtain an image that is easy to observe with both the eyepiece and the television device.

This invention was made based on the above circumstances, and its purpose is to display an image on a television device and an eyepiece without dividing the optical signal from an endoscope. It is an object of the present invention to provide an adapter for an endoscope viewing device that allows a good image to be observed using both the television device and the eyepiece.

An embodiment of the present invention will be described below with reference to FIG. 1 in the figure is an endoscope. The endoscope 1 consists of an insertion section 2 and an attachment section 3 provided at the rear end of the insertion section 2. The contact portion 3 has an eyepiece portion 4 formed therein, and is connected to a universal cord 6 having a connector 5 at its end to be inserted into a light source device (not shown). A light guide 7 is inserted through the universal cord 6. This light guide 7 reaches the insertion part 2 via the joint part 3,
The distal end faces the distal end surface of the insertion section 2. Also,
An image guide 8 is inserted through almost the entire length of the insertion section 2 and the contact section 3, and the rear end surface of the image guide 8 faces the first eyepiece 9 provided in the eyepiece section 4. There is. Therefore, when illumination light is output from the light source device to which the universal cord 6 is connected, this illumination light is transmitted to the light guide 7.
The optical signal of the area irradiated by the illumination light is emitted into the body cavity through the illumination light and enters the image guide 8 where it is imaged by the first eyepiece lens 9.

On the other hand, an adapter 10 for a viewing device is detachably provided in the eyepiece section 4. The main body 11 of this adapter 10 is formed into a substantially box shape, and a through hole 12 is bored in one side facing the eyepiece 4, and a second through hole 12 is bored in the other side opposite to this one side.
An eyepiece lens 13 is held. Also, within the main body 11, there is a
A first reflecting mirror 14 is arranged at an inclination angle of 45 degrees,
A solid-state image sensor 15 is provided in the reflection direction of the first reflecting mirror 14 via an imaging lens 14a. Furthermore, a second eyepiece lens 1 is provided within the main body 11.
A second reflecting mirror 16 is arranged at an inclination angle of about 45 degrees with respect to the optical axis of the second reflecting mirror 16.
An image receiving device 17 consisting of a CRT, an LED array, etc. is provided in the incident direction.

The solid-state image sensor 15 is connected to a camera control unit 18 that includes a preamplifier, a _Yc separation circuit, a color demodulation circuit, Y and color process amplifiers, a color coder, etc. (not shown). A television device 19 and a monitor circuit 20 are connected to this camera control section 18 . This monitor circuit 20 has a built-in video amplifier, color reproduction, color synchronization, deflection, high voltage circuit, etc. (not shown), and is connected to the main body 1 of the adapter 10.
The image receiving device 17 is connected to the image receiving device 17 provided in the image receiving device 1 .

Next, the operation of the above configuration will be explained. When illumination light is emitted from the light guide 7 and an optical signal of the observation area is incident on the image guide 8, the optical signal is captured by the first eyepiece 9, the first reflecting mirror 14, and the imaging lens 14a for solid-state imaging. Element 15
imaged on top. Then, this optical signal is converted into an electrical signal by the solid-state image sensor 15, and further formed into, for example, an NTSC signal by the camera control section 18. This signal is then input to a television device 19 and a monitor circuit 20, where it is converted into a television signal and sent to the image receiving device 17, where an image of the observed region is reproduced on the screen. Therefore, when the operator looks through the second eyepiece lens 13, the image reproduced on the image receiving device 17 is transmitted to the second reflecting mirror 1.
It can be observed through 6.

On the other hand, if another person wants to view the observed area, by turning on the television device 19, the signal from the camera control unit 18 is displayed on the television device 19, so that the observed site with the endoscope 1 can be viewed by another person. be able to.

That is, according to the above configuration, the optical signal from the endoscope 1 is converted into an electrical signal by the solid-state image sensor 15 without being divided, and an image is projected on the image receiving device 17 and the television device 19 using this electrical signal. Because I did it,
The amount of light incident on the solid-state image sensor 15 from the endoscope 1 does not decrease, so that a clear image can be observed on the image receiving device 17 and the television device 19.

Note that this invention is not limited to the above embodiment,
For example, in the main body 11 of the adapter 10, as shown in FIG. If it is arranged on the optical axis of the eyepiece lens 13, the first and second reflecting mirrors 14, 1 as shown in the above embodiment
6 becomes unnecessary. Note that 21 in FIG. 2 is a partition plate that prevents interference between the optical signal entering the solid-state image sensor 15 and the optical image output from the image receiving device 17.

Further, although not shown, the camera control section 18 and the monitor circuit 20 may be installed within the main body 11 of the adapter 10.

As described above, the present invention allows an optical signal from an endoscope to be received by a solid-state image sensor without being split, converting it into an electrical signal, and using this electrical signal to send an image to a television set and an image receiving device built into an adapter. can now be displayed. Therefore, the amount of light incident on the solid-state image pickup device that receives optical signals from the endoscope is not halved as in the conventional case, and the electric signals from the solid-state image pickup device are used in the television set and image receiving device A clear image with good S/N ratio can be displayed.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a viewing device showing one embodiment of the present invention, and FIG. 2 is a block diagram of a viewing device showing another embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Endoscope, 4... Eyepiece, 8... Image guide, 10... Adapter, 15... Solid-state image sensor, 17... Image receiving device, 19... Television device.

Claims (1)

[Claims] 1. In an adapter for a viewing device that is detachably installed in the eyepiece of an endoscope, the adapter converts the optical signal from the image transmission optical system of the endoscope into an electrical signal and transmits the image to the television device. A solid-state image pickup device that displays a , and an image receiving device that is connected to the solid-state image pickup device and displays an image similar to the image displayed on the television device using electrical signals from the solid-state image pickup device. An adapter for endoscope viewing equipment.