JP2665347B2 - Light source device for endoscope - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope light source device that can output white light and surface-sequential light.

[Problems to be solved by conventional technology and invention] In recent years, by inserting an elongated insertion portion into a body cavity,
An endoscope (also referred to as a scope or a fiber scope) capable of observing organs in a body cavity or performing various treatments using a treatment tool inserted into a treatment tool channel as necessary.
Is widely used.

Also, various electronic scopes using a solid-state imaging device such as a charge-coupled device (CCD) as an imaging unit have been proposed. This electronic scope has advantages such as higher resolution than a fiber scope, easy recording and reproduction of images, and easy image processing such as enlargement of an image and comparison of two images.

For example, as described in Japanese Patent Application Laid-Open No. 61-82731, a method for sequentially switching irradiation light to R (red), G (green), B (blue), etc. A sequential type and, for example, as shown in JP-A-60-76888, a filter array in which color filters transmitting color lights such as R, G, and B are arranged in a mosaic pattern on the front surface of a solid-state imaging device. There is a simultaneous type provided. The frame sequential method has an advantage that the number of pixels can be reduced compared with the simultaneous method, while the simultaneous method has an advantage that color shift does not occur.

Further, the electronic scopes are diversified according to the purpose of use. For example, for upper or lower digestive organs, inserts having an outer diameter of around 10 mm are used. On the other hand, for bronchial use, the outer diameter is usually 5φ
Anything less than about mm is required. In this way, the outer diameter of the insertion portion is attached to various electronic scopes over a wide range,
It is impossible to use the same type of image sensor and the same type of imaging system in terms of physical and performance. That is, for example,
In order to realize an electronic scope for bronchi (small diameter), an imaging element having a small number of pixels must be used.

When the number of pixels is small as described above, in order to prevent a decrease in resolution, rather than a simultaneous imaging method using a color mosaic filter, the light of each wavelength of R, G, B is illuminated in a frame sequential manner, A plane-sequential color imaging method in which plane-sequential imaging is performed under the illumination, and these are combined and displayed in color is advantageous.

On the other hand, for those having an outer diameter of about 10 mm, it is advantageous to increase the number of pixels and use a simultaneous imaging method for improving the image quality.

Incidentally, the fiber scope or the electronic scope is generally used by being connected to a light source device that supplies illumination light suitable for each scope.

The illumination method differs between the fiber scope, the plane-sequential type electronic scope, and the simultaneous type electronic scope. That is, an electronic scope that is simultaneous with a fiber scope requires white light, and a plane-sequential type electronic scope requires light that sequentially switches to R, G, B, and the like. However, the conventional light source device can only output illumination light corresponding to one of a plane-sequential type electronic scope and a simultaneous type electronic scope or a fiber scope. It is necessary to prepare different light source devices and perform different operations, which is not economical and efficient.

Japanese Patent Application Laid-Open No. 60-243625 discloses a display screen of a monitor television or the like by connecting a fiber scope having an optical fiber for transmitting an image to a control device of an electronic scope having a plane sequential light source device. There is disclosed a connection system capable of observing at a. However, in this system, it is not possible to use a simultaneous electric scope and perform a visual observation using a fiber scope.

Therefore, the present applicant has filed a Japanese Patent Application No. 61-21461 filed earlier.
In the specification, an endoscope light source device capable of outputting white light and plane-sequential light is provided.

By the way, in a light source device capable of outputting such white light and plane-sequential light, for example, filters that transmit light in respective wavelength regions such as R, G, and B are arranged along the circumferential direction. The rotating filter is switched between plane-sequential light and white light by inserting and removing the rotating filter from the illumination optical path. The rotating filter is necessary for the surface sequential light output, but is not necessary for the white light output. for that reason,
Even when the white light is output, that is, when the rotary filter is retracted from the illumination optical path, rotating the rotary filter wastes power consumption.

[Object of the Invention] The present invention has been made in view of the above circumstances, and provides an endoscope light source device capable of outputting white light and plane-sequential light and reducing power consumption. It is intended to provide.

[Means for Solving the Problems] A light source device for an endoscope according to the present invention includes an endoscope that requires white light as illumination light and a plane-sequential imaging unit and requires plane-sequential light as illumination light. A light source device capable of supplying illumination light to an endoscope, wherein a light source that emits white light, is inserted into and removed from an illumination light path from the light source, and when inserted into the illumination light path, A rotating filter that converts the emitted white light into a surface-sequential light, a detecting unit that detects whether the rotating filter is inserted into an illumination optical path, and the rotating filter that is illuminated according to a detection output of the detecting unit. Control means for rotating the rotary filter only when inserted into the optical path.

[Operation] In the present invention, when the detection unit detects that the rotary filter has been inserted into the illumination light path, the control unit rotates the rotation filter, and when the rotation filter is retracted from the illumination light path, the rotation filter rotates. The filter is not rotated.

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

1 to 12 relate to one embodiment of the present invention, and FIG.
FIG. 2 is an explanatory view showing the entire endoscope system, FIG. 2 is an explanatory view showing a fiberscope, FIG. 3 is an explanatory view showing a frame sequential external television camera, and FIG. 4 is a simultaneous external television camera. , FIG. 5 is an explanatory diagram showing a frame sequential electronic scope, FIG. 6 is an explanatory diagram showing a simultaneous electronic scope, FIG. 7 is a block diagram showing a configuration of a video processor, and FIG. 8 is a camera. FIG. 9 is a block diagram showing a configuration of a frame sequential process circuit, FIG. 10 is a block diagram showing a configuration of a simultaneous process circuit, and FIG. 11 is a filter moving device of a light source device. FIG. 12 is a side view showing a modification of the rotation driving means of the rotary filter.

As shown in FIG. 1, the endoscope system includes an endoscope light source device 1, and enables an naked eye observation as an endoscope (hereinafter, referred to as a scope) connected to the light source device 1. A fiber scope 2E, a plane-sequential electronic scope 2A having a plane-sequential imaging unit, and a simultaneous electronic scope 2B having a simultaneous imaging unit are provided. Further, as an external television camera which is detachably connected to the eyepiece of the fiber scope 2E and displays an image on a monitor, a frame sequential external television camera 4A and a simultaneous external television camera are used.
4B. In addition, the plane sequential electronic scope 2A
Alternatively, a video processor 5 which is connected to a field sequential type external television camera 4A and performs signal processing on these, and the simultaneous electronic scope 2B or the simultaneous external television camera
4B is connected and includes a camera control unit 6 for performing signal processing on these, and a television monitor 7 connected to the video processor 5 and the camera control unit 6.

Each of the scopes 2E, 2A, and 2B includes an elongated, for example, flexible insertion section 11, and a large-diameter operation section 12 is connected to the rear end of the insertion section 11. A flexible universal cord 13 is extended laterally from the operation unit 12, and a light source connector is provided at the tip of the universal cord 13, respectively.
14E, 14A and 14B are provided. Each light source connector 14
E, 14A and 14B are connected to the light source connector receiver 15 of the light source device 1.

2A and simultaneous electronic scopes
2B, electrical connector receivers 16A and 16B are provided on the side portions of the light source connectors 14A and 14B.
A and 16B are connected to one ends of signal codes 17A and 17B, respectively. The electrical connectors 18A and 18B provided at the other ends of the signal codes 17A and 17B are connected to the electrical connector receptacle 19A of the video processor 5 and the electrical connector receptacle 19B of the camera control unit 6, respectively. I have.

The light source device 1 and the video processor 5 include:
Corresponding electrical connector receivers 50 and 51 are provided, respectively. The electrical connector receivers 50 and 51 are connected by a signal cord 52.

The inside of each of the scopes 2E, 2A, 2B is the second
It is configured as shown in FIG. 5, FIG. 5, and FIG.

In each of the scopes 2E, 2A, and 2B, an objective lens system 22 and a light distribution lens 23 are disposed at the distal end 21 of the insertion section 11. A light guide 24 for transmitting illumination light is continuously provided on the rear end side of the light distribution lens 23, and the light guide 24 is inserted into the insertion portion 11 and the universal cord 13, and the light source connectors 14E, 14A , 14B. By connecting the light source connectors 14E, 14A, and 14B to the light source connector receiver 15 of the light source device 1, illumination light suitable for each scope is supplied from the light source device 1 to the incident end of the light guide 24. It is supposed to be. The illumination light is guided to the distal end portion 21 by the light guide 24, is emitted from the emission end of the light guide 24, passes through the light distribution lens 23, and irradiates the subject.

As shown in FIG. 2, in the fiberscope 2E, a distal end surface of an image guide 26 inserted into the insertion section 11 is arranged at an image forming position of the objective lens system 22. At the rear end of the operation unit 12, an eyepiece 28 having an eyepiece 27 facing the rear end of the image guide 26 is provided.
An image guide is provided by the objective lens system 22.
The subject image formed on the distal end surface of the eyepiece 26 is transmitted to the eyepiece 28 side by the image guide 26,
From 28, it is observed through an eyepiece 27.

On the other hand, as shown in FIGS. 5 and 6, in the field sequential type electronic scope 2A and the simultaneous type electronic scope 2B, a solid-state image sensor as an image pickup means, for example, a CCD 31A, is provided at an image forming position of the objective lens system 22. 31B is provided. Note that a color filter array 32 in which color filters transmitting red (R), green (G), blue (B), and the like are respectively arranged in a mosaic pattern is provided on the front surface of the CCD 31B of the simultaneous electronic scope 2B. Have been.

A signal output signal line 34 and a drive pulse application signal line 35 are connected to the CCDs 31A and 31B via a preamplifier 33. The signal lines 34 and 35 are inserted into the insertion portion 11 and the universal cord 13 to receive the electrical connector.
Connected to 16A and 16B.

Further, the frame sequential external television camera 4A and the simultaneous external television camera 4B are configured as shown in FIGS. 3 and 4, respectively.

That is, the television cameras 4A and 4B are provided with a camera body 36 detachably connected to the eyepiece 28 of the fiber scope 2E.
A, 36B and a signal code 37 extended from the main bodies 36A, 36B.
A, 37B, and electrical connectors 38A, 38B provided at the ends of the signal codes 37A, 37B. The electrical connector 38A of the frame sequential external television camera 4A is connected to the electrical connector receptacle 19A of the video processor 5, while the electrical connector 38B of the simultaneous external television camera 4B is connected to the electrical connector of the camera control unit 6. It is designed to be connected to the receiver 19B. An imaging lens 39 for imaging light from the eyepiece 28 is provided in each of the camera bodies 36A and 36B, and at an imaging position of the imaging lens 39,
CCDs 31A and 31B are provided respectively. A color filter array 32 in which color filters transmitting R, G, B, and other color lights are arranged in a mosaic or the like is provided on the front surface of the CCD 31B of the simultaneous external television camera 4B. Each of the above
A signal line 34 for signal output and a signal line 35 for driving pulse application are connected to the CCDs 31A and 31B via a preamplifier 33. The signal lines 34 and 35 are inserted into the signal cords 37A and 37B and connected to the electrical connectors 38A and 38B.

By the way, when observing the naked eye using the fiberscope 2E, when using the simultaneous external TV camera 4B connected to the eyepiece 28 of the fiberscope 2E, and when using the simultaneous electronic scope 2B, White light is required as the light. On the other hand, when the field sequential external television camera 4B is connected to the eyepiece 28 of the fiber scope 2 and used, and when the field sequential electronic scope 2A is used, illumination light is used. Requires plane-sequential light that is sequentially switched in three primary colors or complementary colors. The light source device 1 of this embodiment can output both the white light and the surface-sequential light.

That is, as shown in FIG. 1, the light source device 1 is connected to a lamp 41 such as a canon lamp or a halogen lamp that emits white light, condenses the light of the lamp 41, and is connected to the light source connector receiver 15. The light source connectors 14E, 14A, and 14B are provided with a condenser lens 42 that enters the light guide 24 at an incident end of the light guide 24. Further, between the lamp 41 and the condenser lens 42, R, G,
A rotary filter 43 having color transmission filters 43R, 43G, and 43B of three primary colors B (or three complementary colors, etc.) is rotatably driven by a motor 44, and can be inserted into and removed from the optical path of the lamp 41. It is arranged in. The motor 44 is rotated by a motor drive circuit 54. Further, the rotary filter 43 and the motor 44 are moved by a filter moving device 45.

Although not shown, the rotary filter 43 is provided with an opening position detection mark to determine the position of each of the R, G, and B openings of the rotary filter 43. An encoder 46 including a photo reflector, a photo interrupter, and the like for detecting a mark is provided. And the detection output of this encoder 46 is
From the electrical connector receptacle 50, it is output to the video processor 5 side.

Further, the light source device 1 has a switching means 49 including a switch for switching output light according to the type of scope.
Is provided. And, by this switching means 49,
The operation of the filter moving device 45 is controlled. That is, when white light is selected by the switching means 49, as shown by a broken line in FIG.
When the rotating filter 43 is retracted from the illumination light path by the filter moving device 45, and when the frame sequential light is selected, the rotating filter 43 is moved into the illumination light path by the filter moving device 45 as shown by a solid line in FIG. Inserted.

In addition, a photo reflector 57 having a light emitting element 55 and a light receiving element 56 is provided as a detecting means near the rotary filter 43 when inserted into the illumination light path.
When the rotary filter 43 is inserted in the illumination light path, the light emitted from the light emitting element 55 is reflected by the rotary filter 43 and received by the light receiving element 56. On the other hand, when the rotary filter 43 is retracted from the illumination light path, the light emitted from the light emitting element 55 does not reach the light receiving element 56. Therefore, based on the output of the light receiving element 56, it is detected whether or not the rotary filter 43 is inserted in the illumination light path.

As the detecting means, a photo-interrupter having a light-emitting element and a light-receiving element arranged at a position sandwiching the rotary filter 43 when inserted into the illumination optical path may be used instead of the photo-reflector 57. In this case, since the light from the light emitting element is blocked by the rotating filter 43 and does not reach the light receiving element, it is detected that the rotating filter 43 has been inserted into the illumination light path. Further, the detection means is not limited to the one using such light, and a microswitch or the like may be used.

The output of the light receiving element 56 is input to a rotation filter control circuit 58. The rotation filter control circuit 58 controls the rotation filter in accordance with the output of the light receiving element 56.
The motor drive circuit 54 is controlled so that the rotary filter 43 is rotated only when 43 is inserted into the illumination optical path.

Meanwhile, the filter moving device 45 is configured as shown in FIG. 11, for example.

That is, the rotary filter 43 and the motor 44 for driving the rotary filter 43 are mounted on a plate-like mounting bracket 106, and a lower part of the mounting bracket 106 is formed with a horizontally bent flange 107. The mounting bracket 106 is movable in a direction in which the rotary filter 43 is inserted into and removed from the illumination optical path by guide means such as a rail (not shown).

A plate-like connecting member 108 is attached to a lower portion of the flange 107. One end of the connection member 10 is bent downward, and the tip of the plunger 111 of the actuator 110 is attached. And this actuator 110
Thereby, the mounting bracket 106 and the rotary filter 43 mounted on the mounting bracket 106 are moved.
The actuator 110 may be a solenoid having a coil and a plunger 111, a piston using air, hydraulic pressure, or the like, or may be a device using a cam. By using such an actuator 110, the filter moving device 45 can be configured simply and inexpensively.

Further, the rotary filter 43 may be driven via a transmission unit without directly connecting the rotary filter 43 and the motor 44. FIG. 12 shows an example in which a belt is used as the transmission means. The rotary shaft 121 of the rotary filter 43 is rotatably supported by bearings 122,122. A pulley 123 is attached to the rotating shaft 121. Further, a pulley 124 is attached to a drive shaft of the motor 44 arranged at a position slightly away from the rotary filter 43. A belt 125 is stretched between the pulleys 123 and 124. The rotation of the motor 44 is transmitted to the rotation shaft 121 of the rotation filter 43 via the pulley 124, the belt 125, and the pulley 123. Note that a cam, a chain, a gear, or the like may be used as the transmission means instead of the pulley and the belt. Thus, the motor is transmitted via the transmission means.
By connecting the rotary filter 43 and the rotary filter 43, the motor 44 can be shifted from the vicinity of the optical axis of the illumination optical path, and the degree of freedom in the arrangement of the rotary filter 43 and the motor 44 increases, enabling high-density mounting.

Incidentally, the video processor 5 is, for example, a seventh processor.
It is configured as shown in the figure.

That is, the video processor 5 includes a frame sequential processing circuit 61A for processing the output signal of the CCD 31A of the frame sequential electronic scope 2A or the external TV camera 4A.
And a driver 62A for applying a drive pulse to the CCD 31A, and these are connected to the electrical connector receiver 19A, respectively. Driven by the driver 62A,
The read output signal of the CCD 31A is amplified by the preamplifier 33, and then input to the frame sequential process circuit 61A.For example, a signal captured under R, G, and B frame sequential light is converted into a color signal. Output as signals R, G, B. Each of the color signals R, G, and B is output as a three-primary-color signal RGB from a three-primary-color output terminal 65A via a driver 64A. The chrominance signals R, G, and B are passed through a matrix circuit 66 to generate a luminance signal Y and chrominance signals RY, BY, which are then input to an NTSC encoder 67A, which outputs an NTSC composite video signal. , And output from the NTSC output terminal 68A. The timing of the frame sequential process circuit 61A, driver 62A and NTSC encoder 67A is controlled by a timing generator 63A. In addition, a timing signal from the encoder 46 of the light source device 1 is input to the timing generator 63A via the receiver 51 through the electric connector 51, and the timing generator 63A performs control synchronized with the rotation of the rotary filter 43. It has become.

The frame sequential process circuit 61A is configured, for example, as shown in FIG.

That is, the output signal of the CCD 31A input via the preamplifier 33 is sampled and held by the sample and hold circuit 71, and then converted into a digital signal by the A / D converter 73, which has been γ corrected by the γ correction circuit 72. Then, via a multiplexer 74 switched by the signal of the timing generator 63A, a signal imaged under R, G, B frame sequential light is transferred to an R frame memory 75R, a G frame memory 75G, and a B frame memory 75B. Written. Each of these frame memories 7
5R, 75G, and 75B are read out at the same time, converted into analog color signals R, G, and B by a D / A converter 76, and output.

On the other hand, the camera control unit 6, for example,
It is configured as shown in the figure.

That is, the camera control unit 6 is connected to the CC of the simultaneous electronic scope 2B or the simultaneous external TV camera 4B.
Simultaneous process circuit that processes the output signal of D31B for video signal
61B and a driver 62B for applying a drive pulse to the CCD 31B
And these are respectively electrical connector receptacles 19B
It is connected to the. The output signal of the CCD 31B driven and read by the driver 62B is amplified by the preamplifier 33, and then input to the simultaneous process circuit 61B.
For example, a luminance signal Y and color difference signals RY and BY are output. The luminance signal Y and the color difference signals R-Y,
BY is input to the NTSC encoder 67B, converted into an NTSC composite video signal, and output from the NTSC output terminal 68B. The luminance signal Y and the color difference signals RY, BY are input to an inverse matrix circuit 69, converted into color difference signals R, G, B, output from a three primary color output terminal 65B via a driver 64B. It has become so. The simultaneous process circuit 61B, driver 62B and NTSC encoder 67B
Are controlled by the timing generator 63B.

The simultaneous process circuit 61B is configured, for example, as shown in FIG.

That is, the output signal of the CCD 31B amplified by the preamplifier 33 is input to the luminance signal processing circuit 78, and the luminance signal processing circuit 78 generates the luminance signal Y. In addition, the CCD31B
Are input to a color signal reproducing circuit 79, and color difference signals RY and BY are generated in time series for each horizontal line. The color difference signals RY and BY are white balance compensated by a white balance circuit 80, one of which is directly delayed by an analog switch 81 and the other is delayed by one horizontal line by a 1H delay line 82 and input to an analog switch 83. You. The color difference signal R is output from the analog switches 81 and 83 which are switched by the switching signal of the timing generator 63B.
-Y and BY are obtained.

Next, the operation of the present embodiment configured as described above will be described.

When observing the naked eye using the fiberscope 2E, a simultaneous external TV camera is attached to the eyepiece 28 of the fiberscope 2E.
When connecting 4B and using the simultaneous electronic scope 2B, the light source connector of the scope 2E or 2B
Connect 14E or 14B to the light source connector receiver 15 of the light source device 1. Further, the switching means 49 of the light source device 1 selects white light. Then, the rotating filter 43 is retracted from the illumination optical path by the filter moving device 45. The fact that the rotary filter 43 has been retracted from the illumination light means that the photo reflector
The rotation filter control circuit 58 controls the motor drive circuit 54 to stop the rotation of the motor 44 by the output of the photoreflector 57 detected by the photoreflector 57. lamp
The outgoing light of 41 is condensed by the condenser lens 42 while remaining white light without passing through the rotary filter 43, and the scope 2E or
The light enters the light guide 24 entrance end of 2B. This illumination light
A light distribution lens guided to the tip 21 by the light guide 24
Through 23, the subject is irradiated.

On the other hand, in the case of using the frame sequential external television camera 4A connected to the eyepiece 28 of the fiber scope 2E and using the frame sequential electronic scope 2A, the scope 2E or
The 2A light source connector 14E or 14A is connected to the light source connector receiver 15 of the light source device 1. Further, the switching means 49 of the light source device 1 selects the light of the frame sequential. Then, the rotating filter 43 is inserted into the illumination light path by the filter moving device 45. The insertion of the rotary filter 43 into the illumination optical path is detected by the photo reflector 57, and the output of the photo reflector 57 causes the rotary filter control circuit 58 to control the motor drive circuit 54 to rotate the motor 44. Let it. The light emitted from the lamp 41 passes through the rotating filter 43, is converted into light in a plane-sequential manner, is condensed by the condenser lens 42, and is incident on the light guide 24 entrance end of the scope 2E or 2A. The illumination light is guided to the distal end portion 21 by the ride guide 24, passes through the light distribution lens 23, and irradiates the subject.

As described above, according to the present embodiment, only when the rotation filter 43 is inserted into the illumination optical path,
Is rotated, so that power consumption can be reduced.

Note that the present invention is not limited to the above embodiment, and for example, the insertion and removal of the rotary filter 43 with respect to the illumination optical path may be manually performed, or a motor may be used.

Further, means for identifying the type of the scope used and the type of the television camera may be provided, and the rotary filter 43 may be automatically inserted into and removed from the illumination optical path based on the output of the identification means. .

Further, both or one of the video processor 5 and the camera control unit 6 may be integrated with the light source device.

Further, the present invention can be applied not only to a flexible endoscope in which the insertion portion has flexibility but also to a hard endoscope in which the insertion portion is hard. Further, it can be applied to both medical and industrial uses.

[Effects of the Invention] As described above, according to the present invention, white light and plane-sequential light can be output, and the rotating filter is rotated only when the rotating filter is inserted into the illumination optical path. Therefore, there is an effect that power consumption can be reduced.

[Brief description of the drawings]

1 to 12 relate to an embodiment of the present invention, FIG. 1 is an explanatory diagram showing the entire endoscope system, FIG. 2 is an explanatory diagram showing a fiberscope, and FIG. Explanatory drawing showing an external television camera, FIG. 4 is an explanatory diagram showing a simultaneous external television camera, FIG. 5 is an explanatory diagram showing a frame sequential electronic scope, and FIG. 6 is an explanatory diagram showing a simultaneous electronic scope. ,
7 is a block diagram showing a configuration of a video processor, FIG. 8 is a block diagram showing a configuration of a camera control unit, FIG. 9 is a block diagram showing a configuration of a frame sequential process circuit, and FIG. 10 is a simultaneous process. FIG. 11 is a block diagram showing the configuration of the circuit, FIG. 11 is a front view showing a filter moving device of the light source device, and FIG. 12 is a side view showing a modification of the rotation driving means of the rotary filter. 1 ... Endoscope light source device 2A ... Surface-sequential electronic scope 2B ... Simultaneous electronic scope 2E ... Fiberscope 4A ... Surface-sequential external television camera 4B ... Simultaneous external television camera 5 ... … Video processor 6… Camera control unit 7… TV monitor 41… Lamp 43… Rotating filter 44… Motor 45… Filter moving device 54… Motor drive circuit 57… Photoreflector 58… Rotating filter control circuit

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Takeaki Nakamura 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside O-Limpus Optical Industrial Co., Ltd. (72) Inventor Yuji Ikuno 2-43-2 Hatagaya, Shibuya-ku, Tokyo No. Within Olympus Optical Co., Ltd. (72) Inventor Toshiaki Nishikori 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Hiromasa Suzuki 2-43-2, Hatagaya, Shibuya-ku, Tokyo No. Olympus Optical Co., Ltd. (56) References JP-A-62-2927 (JP, A)

Claims (1)

(57) [Claims] 1. An endoscope which requires white light as illumination light and an endoscope which has a plane-sequential imaging means and can supply illumination light to an endoscope which requires plane-sequential light as illumination light. A light source device for emitting white light, wherein the light source device is inserted into and removed from an illumination light path from the light source, and when inserted into the illumination light path, converts the white light emitted from the light source to surface-sequential light. A rotation filter that detects whether the rotation filter has been inserted into the illumination light path, and a detection unit that detects whether or not the rotation filter has been inserted into the illumination light path. An endoscope light source device comprising: control means for rotating a filter.