JPS6210724Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to an illumination device for an endoscope.

When observing the inside of a body cavity using an endoscope,
The illumination light guided through the light guide is irradiated from the head to the observation target, and the reflected light is guided to the handle through the image guide. Know the condition.

Among the objects to be observed, there are some that are difficult to detect because the unevenness is slight, such as cancer, extremely low raised lesions, and extremely shallow depressed lesions.
For this reason, it is not possible to observe the observation object three-dimensionally by simply irradiating a single light from the front of the observation object as in the past, and it is difficult to accurately discover and observe lesions with slight irregularities. is difficult.

The present invention was developed in view of the above-mentioned problems, and its first purpose is to provide an endoscope illumination device that can accurately discover and observe cancers and slightly uneven lesions. It's about getting.

A second object is to provide an illumination device for an endoscope that provides shadows on the lesions and allows three-dimensional observation of their unevenness.

In order to achieve the above objectives, the present invention:
The endoscope is characterized in that a plurality of irradiation ports are provided in the head of the endoscope, and a plurality of illumination lights are irradiated diagonally to the object to be observed.

Another feature is that a plurality of illumination lights having different wavelength bands are irradiated diagonally to the object to be observed.

Yet another feature is that the wavelength bands of the illumination light are complementary to each other.

Another feature is that a plurality of illumination lights are alternately blinked to illuminate the observation target.

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a schematic explanatory diagram showing an embodiment of the illumination device for an endoscope according to the present invention, where 1 indicates a light guide and 2 indicates an image guide. The light guide 1 guides illumination light generated from a light source 3 such as a Canon lamp to a head 6 via a handle 4 and a flexible tube 5. Further, the image guide 2 guides reflected light from the observation object 8 that has entered through the observation window 7 of the head 6 to the eyepiece portion 9 of the handle portion 4 .

A plurality of irradiation ports 10 and 11 are provided in the head 6, and the illumination light guided through the light guide 1 is irradiated diagonally onto the observation object 8, respectively.

The light source 3 that generates illumination light may be one that guides the illumination light generated from a single lamp through a plurality of light guides 1 as shown in FIG. 1, or a semi-transmissive mirror or the like as shown in FIG. Alternatively, a plurality of lamps may be used to send illumination light to a plurality of light guides 1 from the beginning.

When the observation object 8 is illuminated diagonally with a plurality of illumination lights, as shown in FIG. Even if the object 8 has a slight irregularity such as a lesion, it can be observed three-dimensionally.

The above-mentioned illumination light is not limited to light in the same wavelength band, but as shown in FIG.
or by providing a filter 13 for each of the plurality of lamps to generate light in different wavelength bands, and further attaching colored glass to each of the plurality of irradiation ports 10 and 11,
It is also possible to transmit illumination light in different wavelength bands.

In particular, when a plurality of illumination lights having complementary colors, such as red and blue-green, are irradiated onto the observation object 8 at the same time, as shown in FIGS. 5 and 6, the areas hit by both illumination lights are white 14, The other parts have 15 red colors and 16 blue-green colors, respectively. As a result, it can be seen that the observation object 8 is raised in the case of FIG. 5, and that the observation object 8 is depressed in the case of FIG.

Furthermore, when multiple illumination lights are made to flicker alternately, the shadow on the observation target 8 moves accordingly.
The unevenness of the observation object 8 can be observed particularly well, and it is possible to facilitate not only visual or photographic discrimination of lesions but also automatic analysis using a computer.

In order to make a plurality of illumination lights flicker alternately, as shown in FIG.
7 may be moved or a plurality of lamps may be made to flicker electrically.

According to the illumination device for an endoscope according to the present invention described above, the following significant effects can be achieved.

First, by irradiating a plurality of illumination lights diagonally to the observation target, it is possible to accurately discover and observe cancers and lesions with slight irregularities.

Second, since the object to be observed can be shaded, its unevenness can be observed three-dimensionally.

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing an embodiment of the illumination device for an endoscope according to the present invention, Fig. 2 is a schematic explanatory diagram of a light source, and Fig. 3 is an illustration of an observation target illuminated with a plurality of illumination lights. Fig. 4 is a schematic illustration of another light source, Figs. 5 and 6 are explanatory drawings showing a state in which illumination light of a plurality of mutually different wavelength bands is simultaneously applied to an observation target, and Fig. 7 is an explanatory diagram FIG. 7 is a schematic explanatory diagram of still another light source. 1...Light guide, 2...Image guide,
8... Observation target, 10, 11... Irradiation port, 12...
...spectroscopy means, 13...filter, 14...white, 1
5...Red, 16...Blue-green, 17...Shadow.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. A plurality of illumination ports are provided in the head of the endoscope in different directions so that a plurality of illumination lights having different wavelength bands are irradiated diagonally onto the object to be observed. An endoscope illumination device characterized by: 2. The illumination device for an endoscope according to claim 1, wherein the wavelength bands of the plurality of irradiated lights are complementary to each other. 3. The illumination device for an endoscope according to claim 1, which is characterized in that a plurality of illumination lights are alternately blinked to illuminate an observation target.