JPS6194016A - Adapter for endoscope device - Google Patents

Abstract

PURPOSE:To simplify a device by providing a rotary filter which conducts light of a specific wavelength to the incident end of a light guide to the inside of an adapter body and providing a light conducting means which conducts the light from a light source device to the rotary filter. CONSTITUTION:The rotary filter 11 provided with color filters 16a, 16b, 16c for R, G, B on the outside peripheral side of a rotary disk 15 is freely rotatably installed between a connecting port part 12 of the adapter body 10 of the adapter 7 and a mouthpiece 13 for an optical relay. The connecting port part 12 is freely attachably and detachably attached to the connector 4a at the top end of a light guide cable 4 and the mouthpiece 13 is connected to the juncture 1b of a light source device 1a for endoscope. When a motor 17 is operated, the light from the device 1a is cooled successively to R, G, B by the rotation of the filter 11 and is supplied to the light guide and therefore the face sequential color image pickup is executed by utilizing the device 1a as it is without the need for a special device.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an endoscope tearing adapter used in a field-sequential color imaging type endoscope apparatus.

[Technical background of the invention and its problems]

Some endoscopes are equipped with a solid-state imaging device such as a COD at the distal end of an insertion section to convey images within a body cavity. In addition, in recent years, endoscopes have been proposed that use solid-state imaging devices to create color images of the inside of the body cavity.

For such color image transfer, the field-sequential color 1111 method is used, as shown in Japanese Patent Application Laid-open No. 9068.5, etc., for reasons such as miniaturization of the element and good color reproducibility. ing.

However, since such a color ML imaging method is not common, it requires equipment such as a special light source device, which has the disadvantage of making the equipment large and expensive.

[Purpose of the invention]

This invention was made by focusing on one particular situation, and its purpose is to
Usually inside? J! Inside used in It? An object of the present invention is to provide an adapter for an endoscope device that can perform frame-sequential color imaging by using a light source device for NIt as is.

[Summary of the invention]

That is, this invention provides a rotating filter that is rotated by a motor and guides light of a specific wavelength to the incident end of the light guide in the adapter body that is attached to the tip of the light guide cable of an endoscope. By providing a light guiding means for guiding light from the endoscope light source device to the filter,
It is intended to enable color imaging using a frame-sequential color imaging method simply by connecting to an endoscope light source device.

[Embodiments of the invention]

The present invention will be explained below based on a first embodiment shown in FIGS. 1 and 3. Fig. 2 shows the overall configuration of the endoscope device, and 1 in Fig. 2 indicates the internal structure. lj! The mirror 1a is a light source device for an endoscope. The endoscope 1 includes an insertion section 3 and a light guide cable 4 in the operation section 2, a solid-state image sensor 5 such as a COD inside the distal end of the insertion section 2, and a light guide 6 inside the distal end of the insertion section 2. The connector 4a provided at the tip of the light guide cable 4 is inserted through the connector 4a. The end of the light guide 6 on the connector 4a side protrudes from the front end surface of the connector 4a and constitutes an incident end 6a. Then, the endoscope device adapter 7 is attached to the connector 4a of the endoscope 1 configured in this way, and color image transfer in the field-sequential color image transfer method is performed using the above-mentioned normal endoscope light source device 1a as is. I am making it possible for you to do so. The structure of this endoscope adapter 7 and the surrounding structure are shown in FIG.

Here, to explain the structure of the adapter 7 for an endoscope device, 10 is the adapter body, 11 is the adapter body 1.
This is a rotary filter installed inside 0.

The adapter main body 10 has a connector 4a and a removable connection port 12 on one side, and a relay lens or a single fiber on the other side facing away from the connection port 12. It is configured with an optical relay base 13 consisting of the following. The rotary filter 11 is rotatably installed between the connection port 12 and the optical relay base 13. As shown in FIG. 3, this rotary filter 11 has R,
G and B color fills 16a and 16b.

16c. The rotating filter 11 is arranged so that its color filter surface is located between the connection port 12 and the optical relay base 13, and also has the following features:
It can be rotated by the driving force of a step motor 17 connected to its center, and can guide specific wavelengths, that is, R, G, and B wavelengths, to the incident end of the light guide 6. . In addition, 18 is the step motor 1
This is a motor control circuit for controlling 7. Further, on the lower side of the rotary filter 11, a photo interrupter 19 for detecting the start position of the rotary filter 11 and each color filter 16a, 16b are provided.

Photo interrupter 20 for detecting the position of 16c
are arranged in parallel, and a color filter 16a.

The phase of 16b and 16G can be detected. In addition, 21 is a small hole provided at a point corresponding to the starting position,
23, 23, and 24 are small holes provided at points corresponding to the R and GlB positions. Of course, it goes without saying that the small holes 21 are provided in the photo-interrupter 19, and the small holes 22, 23, and 24 are provided in the photo-interrupter 20. The endoscope adapter 7 configured in this manner has its connection port 12 detachably attached to the connector 4a which is the tip of the light guide cable 4, and also has an optical relay cap 13 attached thereto. By connecting to the connection part 1b of the light source device 1a for the inner 711M, the light can be guided to the rotating filter 11 using the optical relay base 13 as a light guide means. That is, the light from the endoscope light source device 1a is sequentially colored R1G and B so that the three color wavelengths necessary for color imaging in the field sequential color imaging method can be sent to the light guide 6. . Note that 1C indicates a lamp built into the endoscope light source device 1a.

On the other hand, 25 is a video processor. A solid-state image sensor 5 provided in the endoscope 1 is connected to the video processor 25.
and the output signal from each of the above seven interrupters 19.
Output signals from 20 are guided, and R, GlB signals, synchronization signals, etc. are processed so that images of the inside of the body cavity can be displayed on a color monitor device (not shown).

But inside? When performing color imaging using J2 mirror 1, In addition to attaching the connection port 12 of the IA mirror device adapter 7 to the tip of the light guide cable 4, connect the optical relay base 13 to the connection port 1b of the endoscope light source device 1a, and from this state, start the motor 17. When activated, the light from the endoscope light source device 1a is sequentially converted to R and G by the rotation of the rotary filter 11.

It is colored B and supplied to the light guide 6.

Then, the video processor 25 receives signals from the solid-state image sensor 5 and each photointerrupter 19, 20, and
The color component signals are combined to generate one color image signal.

Thus, without requiring any special equipment, by simply connecting the endoscope device adapter 7 to the endoscope light source device 1a, the endoscope light source device 1a can be used as is to perform the field-sequential color imaging method. Color imaging can be performed.

Further, FIGS. 4 and 5 show a second embodiment of the present invention, in which an optical relay light guide cable 30 is adopted as the light guiding means, and the light from the endoscope light source device @la is is guided to the rotary filter 11. In addition, in FIG. 5, 31 indicates a condensing lens. However, in FIGS. 4 and 5, the same components as those in the first embodiment described above are given the same reference numerals and their explanations are omitted.

〔Effect of the invention〕

As explained above, according to the present invention, color imaging using the frame-sequential color rim method can be easily performed using an endoscope with a built-in solid-state image sensor by simply connecting it to an endoscope light source device. It becomes like this.

Therefore, it is possible to perform frame-sequential color imaging using the endoscope light source device normally used in endoscopes without requiring any special equipment.

[Brief explanation of the drawing]

1 to 3 show a first embodiment of this invention,
Is Figure 1 inside? J! Figure 2 is a cross-sectional view showing the structure of the mirror device adapter and the state in which the endoscope device adapter is installed between the endoscope light source device and the light guide cable. 11 is a perspective view showing the entire endoscope device, FIG. 3 is a front view showing a rotating filter, FIGS. 4 and 5 show a second embodiment of the present invention, and FIG. 4 is a perspective view showing the entire endoscope device. FIG. 5 is a cross-sectional view showing the structure of the endoscope M device adapter and the state in which the endoscope device adapter is installed between the light source device for family celebrations and the light guide cable. . 1...inside? 1! Mirror, 1a... Light source device for endoscope, 4
...Light guide cable, 6...Light guide,
11... Rotating filter, 13.30... Optical relay base, optical relay light guide cable (light guide means),
17...Step motor (motor). Applicant's agent Patent attorney Atsushi Gaiben

Claims (1)

[Claims] An adapter body that is attached to the tip of the light guide cable of an endoscope that has a solid-state image sensor and a light guide cable, and a light guide provided in the adapter body that is specific to the incident end of the light guide that is inserted into the light guide cable. An endoscope device comprising: a rotating filter that guides light with a wavelength of adapter for.