JPS5969052A - Photographic apparatus for endoscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscope photographing device, and more particularly to an endoscope photographing device having a built-in solid-state image sensor and an auto-white mechanism.

A semiconductor solid-state imaging device was applied in place of the conventional imaging tube for an endoscope imaging device that photographs white images of the body cavity of a living body during endoscopic diagnosis. The configuration ti is already known. In such an endoscope photographing device having all solid-state image elements built-in, a white glare adjuster+14 (auto white mechanism) is provided in order to obtain an appropriate photographed image. The auto-white mechanism is important for making it possible to always make appropriate white and glance adjustments for the photographic frame. That is, the light source devices that can be used when performing endoscopic diagnosis include a collation light source lamp such as a Rodin lamp that generates illumination light, and a xenon radiation tube that generates photographic light. Some types of endoscope light source lamps have a built-in light source lamp.For example, a Rodin lamp has a characteristic that its color temperature changes significantly depending on its brightness. There was a problem in that the color tone of the monitor image captured by the solid-state image sensor could not always be obtained properly. If images are to be monitored with good image quality, all lesions detected in body cavities can be accurately diagnosed and photographed in appropriate color tones, it would be desirable to have an agreement.

The present invention was made in view of the circumstances described above, and its purpose is to improve the accuracy of endoscopic diagnosis 1/C, and to improve the optimization of both images taken during endoscopic diagnosis. The object of the present invention is to provide an endoscopic photographing device capable of performing diagnosis.

An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, an endoscope 2 is connected to an endoscope light source 6 via a bar cord 4. As shown in FIG. The endoscope light source device 6 has a built-in illumination light source lamp ``8'' such as a halodan lamp that generates illumination light, and a photographing light source lθ such as a xenon discharge -f that generates all photographing light.
These light source lamps 6.8 are connected to a light emission control circuit 12 including an NC source circuit. The light source switching control circuit 14 is
By driving the mirror integral 16f switching j, the light source run from the light source run f6.8 is fully selectively guided into the light incident end of the light guide 18. The light guide 9-8 extends inside the universal cord 4, and further extends to the operating section 2o of the family celebration m%j and the quadruple human part 22 which can freely play 4 songs. As a result, the light generated from the endoscope light device λ6 is transmitted through the light guide 8, and the light generated from the endoscope light device λ6 is transmitted to the front end of the endoscope insertion section 22. (not shown) to the outside.On the other hand, internal vision!
Similarly, an image consisting of an optical fiber bundle is inserted into the image guide 24, and an optical image such as an image inside a body cavity is transmitted to the endoscope eyepiece 26 via the image guide 24. The universal cord 4 is inserted into the eyepiece H112e without extending to the endoscope insertion section 12.
It's coming out.

The endoscope eyepiece section 26 is removably equipped with an endoscopy, 1/'λ ij++ imaging device 32 which incorporates a solid-state imaging device 30 such as a CCI. Solid-state image sensor 3
θ is connected to an amplifier circuit 34 and a control circuit 36 that controls the operation of the solid-state imaging device.

The amplifier circuit 34 is a camera control unit (Cam
era Control Unit (hereinafter abbreviated as CCU) 38, a separate monitor device ffi
Connected to 4o. On the other hand, a part of the optical fiber 18 of the light guy + p no'g disposed inside the endoscope eyepiece 26
The light emitting end 18h of a is configured to face the peripheral area of the imaging area of the solid-state image sensor 3o via the condensing lens 42. Therefore, as shown in FIG. 2, the light generated by the endoscope light source device 6 and guided through the optical fiber 18a is transmitted to
4, a portion other than the 116 irradiation area of the image light obtained through the id 24 is constantly irradiated as spot light 46. After the image pickup signal outputted from the solid-state image sensor 3o in this way is amplified by the amplifier circuit 34,
It is transmitted to CCU 3B. In response to the signal, the CCU 38 determines whether the image is real ri obtained via the id 24.
i 1 component is image-processed and displayed on a CRT (not shown) of the monitor device 4θ, and the optical fiber bundle 18af is
The light quality of the used light is detected based on the spot light 46 corresponding to the partial light from the endoscope light source device 6 obtained through the light source device 6, and the white balance of the monitor image is adjusted according to the light quality data. 'jcJ ffL.

When performing endoscopic diagnosis using the above-described embodiment of the endoscopic photographing apparatus of the present invention, the endoscope insertion section 22 is inserted into a body cavity of a human body such as a patient. When illuminating the inside of the body cavity with collimation light to monitor images inside the body cavity, the mirror 8 in the light source device 6 for the endoscope is in the position shown by the solid line in FIG. The light from the light source lamp 8 is guided into the body cavity through the id 18f, and a part of it is transmitted through the optical fiber east 18m to the eyepiece 2.
The light is guided into the endoscope photographing device 32 equipped with 6Vc, and is irradiated as a light spot 46 to the peripheral region of the imaging region 44 of the solid-state imaging device 3o. Inside the insertion section 22'ff: An image inside the body cavity is obtained by the collimation light guided into the body cavity through the extending light guide 18. The image is formed approximately at the center of the imaging area 44 of 3o.The imaging signal output from the solid-state imaging device 3θ at this time is transmitted to the CCU 38 via the amplifier circuit 34 as described above.Endoscopic diagnosis During the period, the images inside the body cavity obtained through the entire image guide 24 are displayed by the CCU 38 on a CRT (not shown) of the monitor device R40, and based on the imaging signal component corresponding to the spot light 46, the CCU J 8
The white balance of the monitor image is constantly adjusted. The light quality of the light from the illumination light source lamp 8 such as a halodan lamp has an unstable property in that its color temperature changes significantly depending on the brightness. The color of the monitor image can be properly adjusted to fully compensate for the change. This allows doctors and other diagnosticians to monitor images inside the body cavity with high-quality images that are consistent with real image colors, allowing them to accurately distinguish even the most dramatic color changes in tissues within the body cavity. Of the affected tissue diagnosis, etc., l? Ji! Can perform blunt diagnosis.

When a diseased tissue is discovered through the above-mentioned endoscopic diagnosis, and in particular when photographing an area within a body cavity that meets the lesion group i, the light source switching circuit 14 in the light source device 6 for an endoscope The piece 16 is cut into the position shown in FIG.

Therefore, since the photographing light from the photographing light source lamp IO, such as a xenon discharge tube, enters the light input end of the id 18,
+8 shadow yt is irradiated into the body and cavity. At this time, a part of the photographing light is irradiated as spot light 46 to the imaging region of the solid-state image sensor 30 in the endoscope photographing device R32 via the optical fiber bundle 18B. Therefore, even during imaging, the CCU S8 performs appropriate color toning adjustment processing for the captured image based on the light quality data of the imaging light actually used for imaging, so that better quality of the inside of the body cavity can be obtained with each imaging. Image engraving can be done quickly.

Although the present invention has been described above using one embodiment, the present invention also applies to the above-mentioned embodiments. The present invention is not limited to the examples in any way, and may be modified and used in various ways by those skilled in the art within the scope of the present invention.

As mentioned above, in the present invention, a part of the "0" that is selectively generated from the light source device for an endoscope can be transferred to a solid body built in the photographing device attached to the endoscope. Illuminates the inx 19 area of the imaged image, and adjusts the color tone of the captured image, such as white balance, according to the light quality of the currently used light based on the imaging light data. Since 4.fR is formed so as to perform adjustment, it is possible to provide an entire f-projection device for an endoscope that can improve captured images during endoscopic diagnosis and constantly improve the image quality.

[Brief explanation of the drawing]

FIG. 2 is a diagram showing the imaging area of the solid-state image sensor of the photographing device for family celebration A in FIG. Thread... Endoscope group, 6... Light source device for endoscope, 8...
Diagnosis ° and light source lamp, 10...photographing light source lamp,
18...Light is ID, 24...Imazo guide,
3θ...Solid B & image hydrogen element 32...Endoscope imaging device, 34...Amplification circuit, 38...Camera control unit (CCU), 40...Monitor device, 44
...virtual image area, 46...spot light. ,

Claims (1)

[Claims] In an endoscope JIT> shadowing device that is attached to an endoscope and works together with an endoscope light source device when capturing image light inside a body cavity of a living body, the above-mentioned ii [ ii
a solid-state image sensor that captures image light, a light irradiation unit that irradiates a predetermined portion of a virtual image area of the solid-state image sensor with a portion of the light generated from the endoscope light source device N, and the solid-state image sensor and a color tone control means for performing color tone optimization processing of the captured image based on light 1f, which corresponds to a part of the light irradiated by the light irradiation means, included in the image pickup signal from the light irradiation means. Features of the light source device for endoscopes.