JPH0380212A - Light source device for endoscope - Google Patents

Abstract

PURPOSE:To make a device small in size and light in weight and to simultaneously supply surface sequentiality illuminating light to plural endoscopes by providing a surface sequentiality rotary filter between 1st and 2nd light emitting ports and an illuminating light emitting means for emitting the illuminating light. CONSTITUTION:A connector 7 is connected to a connector receiver 39 for a main scope functioning as the 1st light emitting port of the light source device 31, and a connector 12 is connected to a connector receiver 46 for a sub scope functioning as the 2nd light emitting port. A condensing optical system 69 for condensing the illuminating light emitted from a main lamp 8 in the light source device 31 and the incident end face of the light guide 57 of the connector 7 are provided on the optical axis of the main lamp 8, and the incident end face of the light guide 67 of the connector 12 is provided on the optical axis of the sub lamp 13 so that the illuminating light emitted from the sub lamp 13 may be made incident on the incident end face. Furthermore, the surface sequentiality rotary filter 71 is provided so as to be orthogonally crossed with the optical axes of the main lamp 8 and the sub lamp 13. Thus, the surface sequentiality illuminating light is simultaneously supplied to the plural endoscopes.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a light source device having a plurality of light exit ports.

[Prior art] Conventionally, when performing observation procedures by inserting other small-diameter endoscopes into the forceps channel of an endoscope, such as a cholangioscope, each endoscope requires its own light source. Therefore, the entire device was large-scale. To solve this problem, there is a technology that splits the light emitted from one light source into two using a light guide and supplies them to each endoscope, as shown in Japanese Utility Model Application Publication No. 48-81690, and a technology that is used in U.S. Pat. 478612
As shown in No. 7, there is a technique in which a plurality of light guide connectors are arranged on a turret and the light guides that supply light are switched by rotating the turret.

Furthermore, a light source device having a plurality of light exit ports and one lamp for each light exit port may be configured as shown in FIGS. 7 to 13. That is, the main light exit for the endoscope is equipped with a lamp and condensing optical system equivalent to those conventionally used, and the light exit for the secondary endoscope is equipped with a more ff! It is equipped with a simple lamp and a condensing optical system.

Below, FIGS. 7 to 13 will be explained.

FIG. 7 shows a state in which each scope is connected to the light source device 1 for an endoscope. On the front of the light source device @1, there are a main scope connector receiver 3 for connecting the main scope 2 and a subscope connector receiver 6 for connecting a subscope 4 mainly having a small diameter such as a biliary scope. It is provided.

FIG. 9 shows the internal configuration of the light source device @1.

Connector 7 of main scope 2 connected to light source device 1
A main lamp 8 and a condensing optical system 9 for condensing the emitted light from the main lamp 8 onto an unillustrated light guide incident end face of the connector 7 are disposed.
is lit by the main lamp power source 11. - On the other hand, a sub-lamp 13 is provided to the connector 12 connected to the light source device @1 of the sub-scope 4, and the sub-lamp 13 is lit by the sub-lamp power source 14.

As for the main lamp 8, the same one as a conventional light source for an endoscope is used. For example, as shown in Figure 10, a heat sink 15 that efficiently dissipates heat generated by large power consumption.
, a lamp house 17 equipped with an infrared cut filter 16 for removing infrared light is used.

On the other hand, regarding the sub-lamp 13, the sub-scope 4 uses a small-diameter scope, and the lamp does not need to be a large-light product.
It may be easy to install, small and lightweight, and has low power consumption.

FIG. 11 shows a lamp holder having a structure that is easy to install. A halogen lamp 18 is used as the sub-lamp 13, and the halogen lamp 18 is attached to the substrate 2 by an elastic member 19.
Fixed to 0. The halogen lamp 18 has an ellipsoidal mirror, so that the emitted light can be focused without using any other optical system.

The main lamp 8, condensing optical system 9, and main lamp R source 11u for the main scope 2 are the same as conventional ones, but the sub-lamp 13 and sub-lamp power supply 14 for the sub-scope 4 are conventional ones. It is smaller, lighter, and has lower power consumption than the previous model, and since the concentrating optical system 9 can be simplified, it is smaller in size ff compared to the conventional case where two units are used.
1ffi can be made as small as possible, and the temperature rise in the exterior can be kept low.

In FIGS. 12 and 13, a lens-integrated xenon lamp 21 is used as the sub-lamp 13. The lens-integrated xenon lamp 21 has a lens inside the lamp body, and condenses light at several points from the light exit opening 22.
It's becoming a sea urchin. By installing the light guide entrance end face of the subscope 4 at a position where the exit side light is focused, light can be supplied to the scope without using any other optical system between the lamp and the light guide.

In the figure, by using a xenon lamp 21, light with a long life and good color rendering properties can be supplied to the subscope 4.

[Problems to be Solved by the Invention] By the way, in the technique of the above-mentioned WJ 1981-81690@, a dedicated endoscope must be manufactured, and a conventional endoscope cannot be used as is.

Further, in US Pat. No. 4,786,127@, there remains the complication of selecting a light guide due to the turret.

In addition, in the examples shown in FIGS. 7 to 13, when each emitted light is a field sequential light for an electronic endoscope, a field sequential rotation filter and a control means for controlling the filter are connected to the light exit port. This results in an increase in the size and cost of the light source device.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a light source device for an endoscope that is small and lightweight and can simultaneously supply illumination light with a first-order surface angle to a plurality of endoscopes. do.

[Means and effects for solving the problems] The light source device for an endoscope of the present invention includes a first light exit port, a second light exit port,
The illumination light emitted from the illumination light generation means is provided between the first and second light output ports and the illumination light generation means, and the illumination light emitted from the illumination light generation means is used as field sequential light. supply to 1
The filter is equipped with two sequential rotation filters.

The endoscope light source device of the present invention is provided with a first light exit port and a second light exit port. A field-sequential rotation filter is provided between the first and second front exit ports and the illumination light emitting means for emitting illumination light, which converts the illumination light emitted from the illumination light emitting means 9 into field-sequential light. . The illumination light converted into field sequential light by the field sequential rotation filter is supplied to the first and second light exit ports.

[Embodiments] Hereinafter, embodiments of the present invention will be specifically described with reference to the drawings.

FIGS. 1 to 4 relate to a first embodiment of the present invention.
The figure is a block diagram of the entire endoscope device, Figure 2 is an external view of the entire internal VT device, Figure 3 is an explanatory diagram of the rotary filter, and Figure 4 is an explanatory diagram of the rotary filter.
The figure is an explanatory diagram of illumination light for the main scope and illumination light for the subscope.

In FIG. 2, the endoscope device 30 includes a main scope 2,
It is composed of a subscope 4, a light source device 31, a main scope video processor 32, a subscope video processor 33, and a monitor 34.

The main scope 2 has an elongated insertion section 36, and an operating section 37 is provided at the rear end of the insertion section 36. The operation unit 37 is provided with a universal cable 38, and a connector 7 provided at the rear end of the universal cable 38 is connected to a main scope connector receiver 39 serving as a first exit side port of the light source device 31. has been done. One connector 41a of the signal cable 41 is connected to the connector 7, and the other connector 41b is connected to the main scope video processor 32.

The subscope 4 includes an insertion section 42 having a smaller diameter than the insertion section 36 of the main scope 2, and an operation section 43 is connected to the rear end of the insertion section 42. A light guide cable 44 is provided on the side of the operation unit 43, and the connector 12 provided at the rear end of the light guide cable 44 serves as a subscope connector receiver as a second forward exit port of the light source 1ff131. 46.

Further, an eyepiece section 47 is provided at the rear end of the operation section 43, and a frame-sequential video camera 48 is detachably attached to this eyepiece section 47. Frame sequential video camera 48
A signal cable 49 is provided, and a connector 49a at the rear end of this signal cable 49 is connected to the subscope video processor 33.

The operation section 37 of the main scope 2 has a forceps insertion port 51.
is provided, and the insertion portion 42 of the subscope 4 is inserted into this insertion port 51.

An objective optical system 52 is provided on the distal end surface of the insertion section 36 of the main scope 2, and a solid-state image carrier 53 is arranged behind the objective optical system 52 to form an image of the island image plane of the objective optical system 52. It is set up to be in position. Solid-state image element 53
A signal line 54 is connected to the signal line 54, and this signal $254 is passed through the insertion portion 36, the operation portion 37, the universal cable 38, and the signal cable 41, and reaches the connector 41b.

Further, a light distribution lens system 56 is provided on the distal end surface of the insertion portion 36 for irradiating illumination light onto a subject.
An output end face of a light guide 57 that transmits illumination light is provided behind the light guide 6 . The light guide 57 is the insertion part 36
The cable is inserted through the operating section 37 and the universal cable 38 to reach the connector 7.

Further, a forceps insertion opening 58 is provided on the distal end surface of the insertion section 36, and this 17r1 hole 58 passes through a forceps insertion channel 59 inserted through the insertion section 36 to the operation section 37.
It communicates with a forceps insertion port 51 provided in the.

The intermediary section 42 of the subscope 4 is inserted into the forceps insertion channel 59 so that its distal end protrudes forward from the opening 58 . An objective optical system 61 is provided on the distal end surface of the insertion 1W42, and an incident end surface of an image guide 62 as an optical image transmission means is provided behind it. The image guide 62 is pushed through the insertion section 42 and the operation section 43 and reaches the eyepiece section 47, and the eyepiece lens system 6
3, a subject image is formed on the image carrying surface of the solid-state image carrying element 64 in the frame sequential video camera 48.

In addition, 1. A light distribution lens system 66 for irradiating illumination light onto a subject is provided on the distal end surface of the insertion portion 42, and a light guide 67 for transmitting illumination light is provided behind this light distribution lens system 66.
An output end face is provided.

The light guide No. 67 is inserted through the insertion portion 42, the operation portion 43, and the western part of the light guide cable 44 to reach the connector 12.

On the other hand, a signal line 68 is connected to the solid-state image sensor 64 of the frame-sequential video camera 48 . This signal line 68 passes through the signal cable 49 and reaches the connector 498.

Inside the light source device 31, there is a main lamp 8 and a sub lamp 1.
3 are provided. Note that the main lamp 8 and the sub-lamp 13 constitute illumination light generating means. On the optical axis of the main lamp 8, there is a condensing optical system 69 that condenses the illumination light from the main lamp 8, and a light guide 5 of the connector 7.
The light guide 67 of the connector 12 is provided with an incident end face on the optical axis of the sub-lamp 13 so that the incident end face of the light guide 67 of the connector 12 roughly divides the illumination light emitted from the sub-lamp 13.

Furthermore, a plane sequential rotation filter 71 is provided so as to be perpendicular to the optical axes of the main lamp 8 and sub-lamp 13. [i'i The 1-turn filter 71 is rotationally driven by a motor 72.

The rotating filter 71 is red (R) as shown in FIG.

Color separation films 73R, 73G, and 73B that transmit green (G) and blue (B) color light are provided in a circular manner. In addition, FIG. 3 shows the rotary filter 71 from the connector 7.12 side.
As shown in the figure, the main lamp 2 and the sub-lamp 13 are positioned at an angle of 180 degrees with respect to the rotation axis of the rotary filter 1.

A photodetector 74 is provided opposite the rotating filter 71, and rotation information of the filter 71 is detected. The photodetector 74 is the encoder 7
The encoder 76 outputs rotation information to a servo controller 77 that controls the rotation of the motor 72. Further, the encoder 76 outputs rotation information to phase shifters 78 and 7 and a pulse generator 79 in the main scope video processor 32.

In the main scope video processor 32,
The signal line 54 is connected to a CCO driver 81 that drives the solid-state image sensor 53 and a preamplifier 82 that amplifies the signal read out from the solid-state illumination image 53 bl.

The CCD driver 81 receives a timing signal from the pulse generator 79, and the preamplifier 82 outputs the amplified signal to the A/D converter 83. The digitized signal from the A/D converter 83 is written into the R memory 86R, G memory 86G, and B memory 86B through a switch 84 whose switching is controlled by the pulse generator 79. Note that writing and reading of the memories 86R186G and 86B are controlled by a pulse generator 79. Memories 86R, 86G, and 86B are connected to a D/A converter 87, and the signals are converted into analog signals and output to the monitor 34.

On the other hand, in the video processor 33 for the υ scope, the signal line 68 is a CC that drives the solid-state image sensor 64.
It is connected to a D driver 88 and a preamplifier 89 that amplifies the signal read out from the solid-state imaging device 53. C.C.
The D driver 88 is configured to receive a timing signal from the pulse generator 91 and is configured to receive a timing signal from the preamplifier 89.
outputs the amplified signal to the A/D converter 92. The signal digitized by the A/D converter 92 is written to an R memory 94R, a G memory 94G, and a B memory 94B through a switch 93 whose switching is controlled by the pulse generator 91. Note that writing and reading of the memories 94R994G and 94B are controlled by a pulse generator 91. Memories 94R, 94G, and 94B are connected to a D/A converter 96, and the signals are converted into analog signals and output to the monitor 34. Note that the pulse generator 91 receives a synchronization signal from the main pulse generator 79 together with the servo controller 77, and further receives a timing signal from the phase shifter 78.

The operation of the endoscope light source device 31 configured as described above will be explained.

The light emitted from the main lamp 8 is divided into red (R) and green (
The light is separated into three colors, G) and blue (B), and enters the light guide entrance end face of the connector 7 of the main scope 2. At the same time, the light emitted from the sub-lamp 13 is separated into three colors, red (R), green (G), and blue (B) by the rotating filter 71, and is incident on the light guide entrance end face of the connector 12 of the Zabscope 4.

Here, the position where the rotating filter 71 cuts the luminous flux of the main lamp 8 and the position where the luminous flux of the sub-lamp 13 is cut are 180rt1 with respect to the rotation axis of the rotating filter 71, as shown in FIG.
Because they are arranged at different positions, the light that enters the light guide 67 of the subscope connector 12 is different from the light that enters the light guide 57 of the main scope connector 7 as shown in FIG. 4(a). It is emitted with a 180 degree delay.

The rotary filter 71 is driven by a motor 72 which is controlled by a servo controller 77, which is connected to a photodetector 74 and an encoder 7.
A signal for driving the motor to rotate steadily is generated based on the rotation speed information of the rotation filter 71 obtained in step 6 and the output of the pulse generator 79. The rotation information of encoder 76 is also output to phase shifter 78 . Since the light supplied to the subscope 4 is delayed by 180 degrees with respect to the light supplied to the main scope 2, the phase shifter 78 delays the rotation information by 180 degrees and outputs it to the pulse generator 91.

The solid-state Illll elementary image 53 built into the main scope 2 is driven by a CD driver 81 which receives the output of the encoder 76 which is the rotation information of the rotation filter 71 and the signal of the pulse generator 79. The output is transmitted to the R memory 86R, G memory 86G, and B memory 86B via a switch 84 controlled by a preamplifier 82, an A/D converter 83, and seven pulse generators, and then read out simultaneously to the D/D A converter 8
7 is input.

On the other hand, the solid-state image device 64 built in the frame-sequential video camera 48 connected to the subscope 4 is also input to the subscope video processor 33 in the same way as above, but the main scope video processor 32 and the subscope In order to synchronize with the sub-scope video processor 33, a light signal generated by the pulse generator 79 in the main scope video processor 32 is input to the pulse generator 91 in the sub-scope video processor 33. A solid-state image carrier 64 built into the frame-sequential video camera 48 connects the output of the pulse generator 79 and the phase shifter 7.
The output of the solid-state image element 64 is driven by a COD driver 88 which receives a signal from a pulse generator 91 which receives an output from a preamplifier 89 and an A/D converter 92.
, via a switch 93 controlled by a pulse generator 91, the R memory 9 is delayed from the input of the memories 86R, 86G, and 86B of the main scope video processor 3.
The signals are written into the 4R and G memories 94G and the B memory 94B, and then simultaneously read out and input to the D/A converter 96.

The D/A comparator 87.96 outputs an analog signal to the monitor 34, and displays the image of the main scope 2 on the main screen 9.
7a, each image of subscope 4 is displayed on a child screen 97b.

In addition, regular image information is displayed on the monitor 34.

Note that the images on the monitor 34 may be displayed separately instead of as a parent-child screen.

According to this embodiment, by adding a simple circuit and a phase shifter 78, the images of the parent and child scopes can be changed to 11. With the light source device of t, it is possible to produce an image corresponding to frame sequential.

Note that the main lamp 8 and the sub-lamp 13 may be provided at positions other than 180ri1 with respect to the rotation axis of the rotary filter 71. In that case, it can be handled by adjusting the phase delay of the phase shifter 78 according to the position.

5 and 6 relate to the second embodiment of the present invention, and FIG.
FIG. 4 is a block diagram of the entire family celebration 11 device, and FIG. 6 is an explanatory diagram of the main parts of another light source device.

A light source device 99 of this embodiment is obtained by omitting the sub-lamp 13 and phase shifter 78 from the light source device 31 of the first embodiment, and providing a beam splitter 98 and a mirror 100 instead.

Note that constituent members similar to those in the first embodiment are given the same reference numerals and explanations thereof will be omitted.

In the light source device 99 of this embodiment, a main lamp 8 is provided as an illumination light generating means. On the light 1 sleeve that connects the main lamp 8 and the incident end surface of the light guide 57 of the main scope connector 7 is a condensing optical system that focuses the light emitted from the main lamp 8 and makes it enter the incident end surface of the light guide 57. 69 are provided. A rotary filter 71 is provided so as to be rotatable by a motor 72 so as to be perpendicular to the optical axis.

Furthermore, a beam splitter 98 is provided between the rotating filter 71 on the optical axis and the incident end surface of the light guide 57, and the beam splitter 98 directs some of the incident light in a direction of 90 degrees with respect to the optical axis. The light is reflected by the light and enters the mirror 100.

The mirror 100 reflects the incident light parallel to the optical axis of the main lamp 8, and reflects it to the light guide 6 of the subscope connector 12.
7. beam splitter 98
The light transmitted through the main scope 2 is irradiated onto the incident end face of the light guide 57 of the main scope 2.

The other configurations are the same as in the first embodiment.

In this embodiment, the pulse generator 91 of the subscope video processor 33 directly receives the signal from the encoder 76, and the main scope video processor 32 and the subscope video processor 33
are working synchronously.

Other operations are similar to those in the first embodiment.

According to this embodiment, a plurality of plane sequential lights can be easily obtained by simply adding a beam splitter 98 and a mirror 100 while leaving the signal system and control system on the light source side unchanged.

Incidentally, as shown in FIG. 6, a rotating filter 71 may be provided between the beam, the splitter 98, the mirror 100, and the connector 7.12. The circuit configuration in this case is similar to that of the first embodiment.

[Effects of the Invention] As explained above, according to the present invention, by providing a plane rotation filter between the plurality of light exit ports and the illumination light generating means, the device is small and lightweight and can be used for a plurality of endoscopes. At the same time, it is possible to supply illumination light sequentially.

[Brief explanation of drawings]

FIGS. 1 to 4 relate to a first embodiment of the present invention.
The figure is a block diagram of the entire Uaisho ytv7ta, Figure 2 is an external view of the entire endoscope device, Figure 3 is an explanatory diagram of the rotating filter,
Fig. 4 is an explanatory diagram of illumination light for the main scope and illumination light for the subscope, Figs. 5 and 6 relate to the second embodiment of the present invention, and Fig. 5 is a block diagram of the entire endoscope device. 6 is an explanatory diagram of the main parts of another light source device, FIGS. 7 to 13 relate to the prior art, FIG. 7 is an external view of the endoscope device, and FIG. 8 is the front side of the light source device. 9 is an explanatory diagram of the internal structure of the light source device, Fig. 10 is an explanatory diagram of the lamp house, Fig. 11 is an explanatory diagram of the lamp holder, and Fig. 12 is an explanatory diagram of the lens built-in xenon lamp. , Figure 13 is the 12th
FIG. 2 is an explanatory diagram of the internal configuration of a light source device having the lamp shown in the figure. 2...Main scope 4...Sub scope 7.
12... Connector 8... Main lamp 13...
・Sub lamp 30...Endoscope equipment Vt31...
Light source device 32... Video processor 33 for main scope...
・Video processor for subscope 39... Connector receiver for main scope 46... Connector receiver for subscope 71... Rotating filter 78... Phase shifter 2nd
Figure 3i! ! Figure 4 Figure 6, Figure 7 Figure 8- Figure 9 Figure 10 Figure 11

Claims (1)

[Scope of Claims] A first light exit port; a second light exit port; provided between the first and second light exit ports and illumination light generation means; A light source for an endoscope, comprising: one plane-sequential rotation filter that converts the emitted illumination light into plane-sequential light and supplies the plane-sequential light to the first and second light exit ports. Device.