JPH08106057A - Endoscope lighting system - Google Patents

Abstract

(57) [Abstract] [PROBLEMS] To provide an endoscope illuminating device capable of allowing illumination light having good spectral characteristics and light distribution characteristics to be incident from one light source to two light guide fiber bundles. With the goal. [Structure] A light guide fiber bundle 61 is branched in a connector 60, one emission end is arranged at the tip of an insertion portion of an endoscope, and the other emission end is arranged so that it can be connected to another light guide. , Both of the light guide fiber bundles 61 in which the incident ratios of the central ray and the peripheral ray of the illumination light flux emitted from the light source 51 are branched.
The incident ends of the light guide fiber bundle 61 are integrally bound so that there is no great difference between a and 61b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an illumination device for an endoscope in which an incident end of a light guide fiber bundle for illumination is attached to and detached from a light source device.

[0002]

2. Description of the Related Art A so-called parent-child type endoscope is used by inserting a baby scope into a channel of a mother scope, and it is necessary to keep the mother scope and the baby scope observable at the same time. Therefore, it is necessary to simultaneously supply the illumination light to the light guide fiber bundles for illumination of both the mother scope and the baby scope.

For this purpose, it is sufficient to use two light source devices, but this not only increases the economic burden but also narrows the space around the operator, making the operation of the endoscope extremely difficult.

Therefore, in the prior art, for example, in Japanese Utility Model Publication No. 57-201.
As shown in No. 65, the incident end of the light guide fiber bundle of the mother scope is formed into a donut-shaped perforated cross section, and the incident end of the light guide fiber bundle of the baby scope is inserted into and removed from the incident end. It was

[0005]

However, when the entrance end of the light guide fiber bundle is formed in a donut-shaped cross section, the light guide fiber bundle does not enter the light beam emitted from the light source near the center of the illumination light beam bundle. Conversely, only the light beam near the center is incident on the other light guide fiber bundle.

Moreover, in order to insert and remove the other light guide fiber bundle into the light guide fiber bundle having a donut-shaped cross section, it is necessary to provide a base at each of the incident end portions of both light guide fiber bundles. As a result, the donut-shaped light guide fiber bundle has a considerably large inner diameter, and only the peripheral rays far from the center of the illumination ray bundle are incident.

Therefore, the illumination light incident on both light guide fiber bundles has a large difference in the spectral characteristic and the light distribution characteristic, and as a result, color unevenness and light distribution unevenness occur. In particular, the illumination light on the side of the light guide fiber bundle with a donut-shaped cross section where only ambient light enters is
The light distribution will be of poor quality.

[0008] Therefore, the present invention provides an illumination device for an endoscope, which is capable of allowing illumination light having good spectral characteristics and light distribution characteristics to enter from two light guide fiber bundles from one light source. To aim.

[0009]

In order to achieve the above object, in the illumination device for an endoscope of the present invention, a connector in which an incident end of a light guide fiber bundle is arranged is incident on the light guide fiber bundle. In an illumination device for an endoscope, which is adapted to be attached to and detached from a light source device having a light source for emitting an illumination light beam bundle, the light guide fiber bundle is branched in the connector, and one exit end is an internal view. It is arranged at the tip of the insertion part of the mirror, and the other exit end is arranged so that it can be connected to another light guide, and the incidence ratio of the central ray and the peripheral ray of the illumination light beam emitted from the light source is The incident ends of the light guide fiber bundles are integrally bound so that there is no great difference between the branched light guide fiber bundles. To.

[0010]

Embodiments will be described with reference to the drawings. Figure 1
1 shows the overall configuration of the first embodiment, where 10 is a mother scope, 30 is a baby scope, and 50 is a light source device.

Mother scope 10 and baby scope 3
No. 0, a tip body 1 with an observation window and an illumination window
1, 31 are connected to the distal ends of the flexible insertion parts 12, 32, and operation parts 13, 33 are connected to the proximal ends of the insertion parts 12, 32, respectively. , 33
Eyepieces 14 and 34 are provided on the projection.

Then, as shown in FIG. 1, the insertion portion 32 of the baby scope 30 is passed through the insertion channel of the mother scope 10, and the tip portion main body 3 of the baby scope 30 is inserted.
1 is used by being projected to the front of the tip end main body 11 of the mother scope 10.

The operation portion 13 of the mother scope 10 is provided with a bending operation knob 16 for operating the bending portion 15 formed at the tip of the insertion portion 12, an air / water feeding operation button 17, a suction button 18, and the like. ing. A bending operation lever 36 for bending the bending portion 35 formed at the tip of the insertion portion 32 is provided on the operation portion 33 of the baby scope 30.
Is provided.

In the light source device 50, the mother scope 10
And a light source lamp 51 for emitting a bundle of illuminating light to be supplied to the baby scope 30, and a light source device 50.
With respect to the connector 60 that is detachably connected to the light guide fiber bundle 61, the light guide fiber bundle 61 is arranged so that the incident end face is located at the converging position of the illumination light emitted from the light source lamp 51 when connected to the light source device 50. Has been done.

The light guide fiber bundle 61 is branched into two in the connector 60, and one light guide fiber bundle 61a is the light guide fiber bundle itself for illuminating the mother scope 10.
The emission end reaches the illumination window of the distal end portion main body 11 through the inside of the connecting flexible tube 19 connected to the operation portion 13 of the mother scope 10.

The exit end of the other light guide fiber bundle 61b branched in the connector 60 is arranged outward at the center of a branch connection connector 62 provided on the side surface of the connector 60. .

The incident end of the illumination light guide fiber bundle 61c of the baby scope 30 is detachably connected to the branch connector 62. The exit end of the light guide fiber bundle 61c for illumination of the baby scope 30 reaches the illumination window of the tip end main body 31 thereof.

Therefore, the bundle of illumination light rays incident on the light guide fiber bundle 61 from the light source lamp 51 passes through the illumination light guide fiber bundle 61a of the mother scope 10 to illuminate the observation range of the mother scope 10 and is branched at the same time. The observation range of the baby scope 30 is illuminated from the light guide fiber bundle 61b through the illumination light guide fiber bundle 61c of the baby scope 30.

FIG. 2 shows the connector 60, and the light guide fiber bundle 61 into which the illumination light is incident from the light source lamp 51 is passed through the insertion tube 64 which projects forward from the connector 60 and reaches the inside of the light source device 50. It is fixed inside.

In other words, the illumination light guide fiber bundle 61a of the mother scope 10 and the light guide fiber bundle 61b branched to the branch connection connector 62 side are integrally bound and fixed in the insertion tube 64.

Therefore, the area of the incident end face of the light guide fiber bundle 61 is the cross-sectional area of the bundle of light guide fibers only, and does not become unnecessarily large because there is no base or the like inside. A condenser lens or the like may be attached to the tip of the insertion tube 64.

The incident end face of such a light guide fiber bundle 61 is set at the convergence position of the bundle of illumination light rays emitted from the light source lamp 51 by inserting the insertion tube 64 into the light source device 50.

Reference numeral 52 is a click spring having a C-shaped cross section for pressing the insertion tube 64 inserted in the light source device 50. Reference numeral 62a is a screw portion for screwing the connection mouthpiece of the illumination light guide fiber bundle 61c of the baby scope 30.

FIG. 3 shows a light guide fiber bundle 61.
Of the light guide fiber bundle 61a for illumination of the mother scope 10 is indicated by a white circle, and the light guide fiber bundle 61 branched to the branch connection connector 62 side is shown for simplicity.
The fiber of b is indicated by a black circle.

As described above, at the incident end face of the light guide fiber bundle 61, the fiber of the illumination light guide fiber bundle 61a of the mother scope 10 and the fiber of the light guide fiber bundle 61b branched to the branch connection connector 62 side are provided. , Are distributed almost evenly throughout.

Therefore, the illumination light supplied to the illumination light guide fiber bundle 61a of the mother scope 10 and the illumination light supplied to the illumination light guide fiber bundle 61c of the baby scope 30 via the branched light guide fiber bundle 61b. With respect to light, there is no difference in the ratio between the central ray and the peripheral ray of the illumination light flux emitted from the light source lamp 51, and therefore there is no difference in the spectral characteristics and the light distribution characteristics.

The light guide fiber bundle 61
As shown in FIG. 4, for example, the incident end face of the light guide fiber bundle 61a for the illumination light guide fiber bundle 61a of the mother scope 10 and the light guide fiber bundle for the branch connection connector 62 side indicated by the black circle are shown in FIG. Even if the fiber of 61b is partitioned into a fan shape, there is no difference in the incidence ratio of the central light and the peripheral light between the two fiber bundles 61a and 61b.

In short, in the present invention, since it is sufficient that there is no large difference in the incident ratio between the central light beam and the peripheral light beam, the fiber arrangement on the incident end face of the light guide fiber bundle 61 may be in another form. A large difference means that there is a difference of, for example, two times or more.

FIG. 5 shows a second embodiment of the present invention, in which the light guide fiber bundle 61c for illumination of the baby scope 30 is directly connected to the inside of the insertion tube 64, and the light guide fiber for illumination of the mother scope 10 is shown. Bundle 61a
Is detachably connected to the branch connector 62. Others are the same as the first embodiment.

FIG. 6 shows a third embodiment of the present invention, in which the illumination light guide fiber bundle 61a of the mother scope 10 has an insertion tube 64 similar to that of the first embodiment.
The light guide fiber bundle 61b that is directly connected to the inside and is branched is extended to the outside of the connector 60, and a branch connection connector 62 is provided at the tip thereof.

Therefore, the incident end of the light guide fiber bundle 61c of the baby scope 30 can be provided in the operating portion 33. Further, the branch connection connector 62 can be used as an auxiliary light source to be used as a light substitute in an endoscopy room near a dark room.

[0032]

According to the present invention, since the illumination light can be simultaneously supplied to the two endoscopes by one light source device,
Not only is the economy high when using a parent-child type endoscope and the operability of the endoscope is excellent, but the incidence ratio of the illumination light flux emitted from the light source from the central portion to the peripheral portion is two. Since there is no difference between the two light guide fiber bundles, it is possible to supply illumination light having good spectral characteristics and light distribution characteristics to both light guide fiber bundles.

[Brief description of drawings]

FIG. 1 is a schematic diagram of the overall configuration of a first embodiment.

FIG. 2 is a schematic sectional view of the connector of the first embodiment.

FIG. 3 is a schematic view of an example of an incident end surface of the light guide fiber bundle of the first embodiment.

FIG. 4 is a schematic view of another example of the incident end surface of the light guide fiber bundle of the first embodiment.

FIG. 5 is a schematic diagram of the overall configuration of a second embodiment.

FIG. 6 is a schematic diagram of the overall configuration of a third embodiment.

[Explanation of symbols]

50 Light Source Device 51 Light Source Lamp 60 Connector 61 Light Guide Fiber Bundle 61a Light Guide Fiber Bundle for Motherscope Lighting 61b Branched Light Guide Fiber Bundle 61c Light Guide Fiber Bundle for Babyscope Lighting 62 Branch Connector

Claims (1)

[Claims] 1. An endoscope in which a connector in which an entrance end of a light guide fiber bundle is arranged is attached to and detached from a light source device having a built-in light source for radiating a bundle of illumination light rays incident on the light guide fiber bundle. In a mirror illumination device, the light guide fiber bundle is branched in the connector so that one exit end is arranged at the tip of the insertion portion of the endoscope and the other exit end can be connected to another light guide. The light guide fiber bundle of the light guide fiber bundle is arranged so that the incidence ratio of the central light ray and the peripheral light ray of the illumination light beam emitted from the light source does not significantly differ between the branched light guide fiber bundles. An illumination device for an endoscope, characterized in that the incident ends are integrally bound.