JPH0820608B2 - Light source device for endoscope - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention supplies illumination light suitable for a scope having a frame-sequential imaging means, a scope having a color mosaic imaging means, and a fiberscope. The present invention relates to a light source device for an endoscope.

[Problems to be Solved by Prior Art 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 fiberscope) capable of observing internal organs in a body cavity and performing various therapeutic treatments using a treatment instrument inserted in a treatment instrument 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 that it has a higher resolution than that of a fiberscope, that recording and reproduction of images are easy, and that image processing such as image enlargement and comparison of two images is easy.

In the color image capturing method of the electronic scope, for example, as shown in Japanese Patent Laid-Open No. 61-82731, illumination light is sequentially switched to R (red), G (green), B (blue) and the like. A frame-sequential type and, for example, as shown in Japanese Patent Laid-Open No. 60-76888, a filter array in which color filters for transmitting R, G, B, etc. color lights are arranged in a mosaic pattern on the front surface of a solid-state image sensor. There is a color mosaic type (also referred to as simultaneous type). The frame sequential method has an advantage that the number of pixels can be reduced as compared with the color mosaic method, while the color mosaic method has an advantage that no color shift occurs.

Further, the electronic scope is diversified depending on the purpose of use. For example, for an upper or lower digestive organ, an insert having an outer diameter of about 10 mm is used. On the other hand, for example, for bronchi, the outer diameter is usually 5φ.
Those of around mm or less are required. In this way, for various electronic scopes with a wide outer diameter of the insertion part,
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 bronchus (thin diameter), it is unavoidable to use an image sensor with a small number of pixels.

When the number of pixels is small in this way, in order to prevent a decrease in resolution, the surface sequential method is illuminated with light of each wavelength of R, G, B rather than the color mosaic type imaging method using a color mosaic filter. It is advantageous to use a frame-sequential color imaging method in which frame-sequential imaging is performed under the illumination, and these are combined to display in color.

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 the color mosaic type image pickup method for improving the image quality.

By the way, 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 fiberscope, the frame-sequential electronic scope, and the color mosaic electronic scope have different illumination methods. That is, the fiberscope and the color mosaic type electronic scope require white light, and the frame sequential electronic scope requires light that is sequentially switched to R, G, B, and the like. However, the conventional light source device cannot output the illumination light corresponding to either one of the frame-sequential type electronic scope, the color mosaic type electronic scope or the fiber scope, and therefore, the user, depending on the type of scope,
It was necessary to prepare different light source devices and perform different operations, which was not economical and efficient.

In JP-A-60-243625, a control device for an electronic scope equipped with a frame sequential light source device is connected to a fiberscope equipped with an optical fiber bundle for image transmission, and a display for a monitor TV or the like is displayed. A connection system capable of being observed on a screen is disclosed. However, with this system, it is not possible to use a color mosaic type electronic scope and to observe with the naked eye using a fiberscope.

[Object of the Invention] The present invention has been made in view of the above circumstances, and includes a scope including a frame-sequential imaging unit, a scope including a color mosaic imaging unit, and a fiberscope capable of visual observation. It is an object of the present invention to provide a light source device for an endoscope, which can supply illumination light suitable for.

[Means and Actions for Solving Problems] The present invention relates to a connector to which a field-sequential light scope for performing observation in response to field-sequential light and a white-light scope for performing observation in response to white light can be connected. Rotation having a receiver, a light source that emits white light, and a region that is provided in the optical path of the emitted light of the light source and that sequentially transmits light in a plurality of specific wavelength regions and a region that transmits white light A plate; a detecting means for detecting that the white light transmission region of the rotary plate is located on the optical axis of the emitted light; and a rotary plate which is rotationally driven when the scope for sequential light is connected. Emits light sequentially,
Control means for controlling the white light transmission region of the rotary plate to stop on the optical axis and emit white light based on the detection means when the white light scope is connected. Light scope, white light scope,
It is also possible to supply illumination light suitable for the fiberscope.

Embodiments Embodiments of the present invention will be described below with reference to the drawings.

1 to 9 relate to a first embodiment of the present invention. FIG. 1 is a perspective view showing the entire system of an endoscope apparatus including a light source device, and FIG. 2 is a fiber with a frame-sequential external camera. Explanatory drawing which shows the structure of a scope, FIG. 3 is explanatory drawing which shows the structure of the fiberscope with a mosaic type external camera, and FIG.
FIG. 7 is an explanatory diagram showing the configuration of the fiberscope, FIG. 5 is a block diagram showing the configuration of the mosaic process circuit, FIG. 6 is a block diagram showing the configuration of the output circuit, and FIG. 7 is a block showing the configuration of the light source device. 8 and 9 are explanatory views showing the structure of the rotary filter, and FIG. 9 is a block diagram showing the structure of the frame sequential process circuit.

As shown in FIG. 1, the light source device 151 accommodates a light source unit 15e and a video processor that performs video signal processing, and can connect any of various scopes (endoscopes). As shown in the figure, there are five scopes,
That is, a surface-sequential electronic scope 2A, a color mosaic electronic scope 2B using a color mosaic filter, a fiberscope with an external surface-sequential television camera (hereinafter referred to as a fiber-scope with a surface-sequential television camera) 2C, There are a fiberscope 2D and a fiberscope 2E with a color mosaic type television camera externally attached (hereinafter referred to as a fiberscope with a color mosaic type television camera).

Each of the scopes 2A, 2B, 2C, 2D and 2E has an elongated insertion portion 3 and an operation portion 4 connected to the rear end side of the insertion portion 3.
A universal cord 5 is extended from the operation portion 4, and light source connectors 5A, 5B, 5C, 5D and 5E are provided at the tip of the universal cord 5. Further, in the frame sequential electronic scope 2A and the color mosaic electronic scope 2B, signal connectors 6A and 6B are provided on the tip end side of the universal cord 5 in addition to the light source connectors 5A and 5B. Also, a fiberscope with a frame sequential TV camera
2C and the fiber mosaic 2D with color mosaic type TV camera have a configuration in which a frame sequential TV camera 8C and a color mosaic type TV camera 8D are attached to the eyepiece 7 of the fiberscope 2E respectively. Signal connectors 6C and 6D are provided at the ends of the extended signal cables.

Connectors 5A, 6A; 5B, 6B; 5C, 6C; 5D, 6D of the scopes 2A, 2B, 2C, 2D, 2E (hereinafter, represented by reference numeral 2 when common to all scopes) Light source device so that 5E can be connected and each scope 2 can be used
On the front surface of the housing 151, for example, two sets of connector receivers are provided. These connector receivers include a light source connector receiver 71 and a signal connector receiver 72. The light source connector receiver 71 includes light source connectors 5A and 5C of a frame sequential electronic scope 2A, a fiber sequence 2C with a frame sequential television camera (these two scopes 2A and 2C are also referred to as a frame sequential scope). Color Mosaic Electronic Scope 2
B, Fiberscope with color mosaic TV camera
2D (these two scopes 2B and 2D are also referred to as mosaic scopes) can be connected to the light source connectors 5B and 5D, respectively, and the connector 5A and 5B can be connected to the light source connector 5E of the fiberscope 2E. , 5C, 5D, 5E have the same shape. Also, this light source connector receiver
In the signal connector receiver 72 adjacent to the lower side of the 71, signals of the frame sequential electronic scope 2A, the frame sequential television camera-equipped fiberscope 2C, the color mosaic type electronic scope 2B, and the color mosaic type television camera fiberscope 2D are provided. These connectors have the same shape so that the connectors 6A, 6C, 6B, 6D can be connected.

When the fiber scope 2E is connected and used, it is macroscopic observation, but when using other scopes 2A, 2B, 2C, 2D, a color monitor 13 connected to the signal output end of the light source device 151. In this way, the captured image can be displayed in color.

In addition, light source connectors 5A, 5B, 5C, 5 in each scope 2
In the present embodiment, D and 5E are provided with a light guide connector and an air / water supply connector, and the connector receiver 71 is also structured to be able to connect these.

The inside of each of the scopes 2A, 2B, 2C, 2D and 2E is constructed as shown in FIGS. 2 to 4.

A light guide 14 that transmits illumination light is inserted into each scope 2, and the illumination light supplied from the light source unit 15e in the light source device 151 to the incident end face is transmitted to the emission end face side, and the scope 2 is in front of the emission end face. It is possible to illuminate the subject side in front through the arranged light distribution lens 16.

Further, in each of the scopes 2, an objective lens 17 for image formation is arranged at the tip of the insertion portion 3. This objective lens 17
At the image forming position of, in both the frame sequential type or color mosaic type electronic scopes 2A or 2B, the solid-state imaging device 18 such as CCD is arranged, while the fiberscope 2E and the television camera 8C or 8D are mounted. In the television-equipped fiberscope 2C or 2D, the image guide 19 is disposed so that the incident end face of the image guide 19 faces.

Further, an eyepiece lens 21 is arranged so as to face the exit end surface of the image guide 19. Then, in the fiberscope 2E, the eye can be brought close to the eyepiece portion 7 to perform observation with the naked eye.

On the other hand, in the case where the frame sequential TV camera 8C or the color mosaic TV camera 8D is attached to the eyepiece 7 of the fiberscope 2E, the solid state is faced to the eyepiece lens 21 via the image forming lens (not shown) and solid-state. An image pickup device 22 is provided.

The solid-state image pickup device 18 or 22 constituting the image pickup means photoelectrically converts the optical image formed on the image pickup surface, is amplified by the preamplifier 24, and then is passed through the signal transmission line to the signal connector 6.
(Represents 6A, 6B, 6C, 6D.) And is input to the video processor in the light source device 151 via the signal connector receiver 72 to which the connector 6 is connected. A clock for driving the solid-state image pickup device is applied to the solid-state image pickup device 18 or 22 from the driver 26a or 26b of the video processor.

In addition, a type signal generation circuit 27 that outputs a type signal for scope identification is used for scopes other than the fiberscope 2E.
A, 27B, 27C and 27D are provided so that they can be identified by the identification circuit 28 in the light source device 151 via the signal connector 6.

By the way, in the light source device 151 which can be connected to any of the scopes 2, as shown in FIG. 7, a light source unit 15e and two sets of video processors are housed.

The light source unit 15e includes a light source lamp 31 which emits white light, and a rotary filter 152 which has red (R), white light (W), and blue (B) color transmission filters and is rotationally driven by a motor 32a. ing. As a result, the field sequential light source and the white light source can be shared.

The white light emitted from the light source lamp 31 passes through the rotary filter 152 to be converted into illumination light of R, W, and B wavelengths in order, and then is condensed by the condenser lens 34 and mounted on the connector receiver 71. Illumination light is supplied to the incident end surface of the light guide 14 thus formed.

The light source unit 1 housed in the light source device 151 in this embodiment.
In 5e, as shown in FIG. 8, the rotary filter 152 used for illuminating the R, W, and B illumination lights in the frame-sequential manner is provided with a fan-shaped window portion on the disc-shaped filter frame 153, and each window is provided. R, W, B in the section
R, W, and B color transmission filters 154R, 154W, and 154B that pass through are attached. The W transmission filter 154W is a filter that passes R, G, and B. (It should be noted that an approximately transparent plate may be used to allow all white light to pass through.) Note that the R, W, and B color transmission filters 154R, 154W, and 154B have the same photosensitive characteristics as the solid-state image sensor 18 or 22. Accordingly, the arcuate length is adjusted so that the illumination period is different.

The filter frame 153 has R, W, and B color transmission filters 154 so that the lead time immediately after illumination with R, W, and B can be detected.
Read pulse (detection) holes 155R, 155W, 155B are provided near the ends of the R, 154W, 154B (with respect to the rotation direction A). The positions of these lead pulse holes 155R, 155W, 155B are
When it reaches a position facing the photo sensor 156, which is arranged so as to sandwich the light emitting element and the filter frame 153, the light from the light emitting element is emitted to the photo sensor 156 in a pulsed form so as to be detected. When this pulsed light is detected, the detection signal is transmitted to the timing generator 52a, and the drive pulse for reading is applied to the solid-state imaging device 18 or 22 via the driver 26a or 26b.

The filter frame 153 has, for example, a lead pulse hole 155.
A start pulse hole 157 is provided at a position radially adjacent to R, and when this position reaches a position facing the photosensor 158, the photosensor 158 outputs a start pulse.

Further, in order to detect the position of the W color transmission filter 154W, a long hole 159 is formed in an arc shape at a position on the outer side in the circumferential direction of the color transmission filter 154W, and the long hole 159 is detected by the photo sensor 160. The W color transmission filter 154W
Position can be detected. The output of the photo sensor 160 controls the stop position of the rotary filter 152. That is, the motor 3 that rotationally drives the rotary filter 152.
When 2a is not in the rotational driving state, the output of the photo sensor 160 is input to the rotation / stop control device 161 such that the stop position of the rotary filter 152 is such that the elongated hole 159 faces the photo sensor 160. , The stop position of the rotary filter 152 is controlled. In this stopped position state, the illumination light of the light source lamp 31 passes through the W color transmission filter 154W, faces the light source connector receiver 71, and can supply white illumination light. When the fiberscope is connected to the connector receiver 71 and nothing is connected to the connector receiver 72, or when nothing is connected to the connector receivers 71 and 72 (both these states, the identification circuit detects a high impedance state). It is possible to identify by doing this.) Or, when the mosaic type scope is connected, it becomes this white illumination state.

On the other hand, when the frame sequential scope is connected, the connection is detected by the identification circuit 28, and a command signal for driving the motor 32a to rotate is output to the rotation / stop control circuit 161 to rotate the motor 32a to perform the frame sequential. Turn on the lighting.

By the way, one of the video processors is for the frame sequential signal processing, and the signal inputted to the signal input terminal of the signal connector receiver 72 is the frame sequential process circuit 16
The signals that are input to 2 and imaged under the illumination light of the respective wavelengths of R, W, and B are output as color signals R, G (green), and B, respectively. Each of the color signals R, G, B is output as a three-primary-color signal RGB from the three-primary-color output terminal via a driver formed by a buffer. Also, the color signals R, G, B
Goes through the matrix circuit and the luminance signal Y and the color difference signal R
-Y, BY are generated, then input to the NTSC encoder, converted into an NTSC composite video signal, and output from the NTSC output terminal.

The frame sequential process circuit 162 is constructed, for example, as shown in FIG.

That is, the signal input through the preamplifier is input to the sample hold circuit 54, sample-held, and then γ-corrected by the γ-correction circuit 55 and converted into a digital signal by the A / D converter 56. Then, the signals imaged under the R, W, B field sequential illumination through the multiplexer 57 which is switched by the signal of the timing generator 52a are written in the R frame memory 58R, the W frame memory 58W, and the B frame memory 58B. Be done. Each of these frame memories 58R, 58
The signal data written in W and 58B are simultaneously read and converted into analog signals by the D / A converter 59, respectively. W
The W color signal read from the frame memory 58W and converted into an analog signal is input to the subtractor 163, and the G color signal is generated by subtracting the R color signal and the B color signal from the W color signal. The R color signal, B color signal, and G color signal are output to the above-mentioned matrix circuit side.

On the other hand, the signal picked up by the solid-state image pickup device 18 or 22 of the mosaic type scope through the signal connector receiver 72 is input to the color mosaic type process circuit 41b, and the luminance signal Y and the color difference signals RY and BY are obtained. Is output. Then, this signal is input to the NTSC encoder, converted into an NTSC composite video signal, and output from the NTSC output terminal. In addition, the signals are input to the inverse matrix circuit, converted into color signals R, G, B, and passed through buffers forming drivers,
The three primary color signal RGB is output from the three primary color signal output terminal.

The color mosaic process circuit 41b is configured as shown in FIG. 5, for example.

That is, the solid-state imaging device 18 amplified by the preamplifier 24
Alternatively, the signal from 22 is passed through the luminance signal processing circuit 61 to generate the luminance signal Y. In addition, the color signal reproduction circuit 62 is input, color difference signals RY and BY are generated in time series for each horizontal line, and white balance compensation is performed by the white balance circuit 63. One of them is directly input to the analog switch 64. The other one is delayed by one horizontal line by the 1H delay line 63a and input to the analog switch 64a, and the color difference signals RY and BY are obtained by the switching signal of the timing generator 52b.

The timing generator 52a applies signals to the drivers 26a and 26b and the NTSC encoder, respectively, and controls so as to perform signal processing in synchronization with the drive pulse used for signal reading from the solid-state imaging device 18 or 22. In this case, in the frame sequential video processor, the timing generator 52a is synchronized with the rotary color filter 152 by the output of the position sensor 51a. The NTSC encoder has a built-in buffer.

By the way, the type signal generation circuits 27A, 27B, 27C, 27D
For example, it is formed by connecting resistors having different resistance values between the two terminals, while the identification circuit 28 determines which resistance value of the scope is connected to the resistance value between the two terminals using a comparator or the like. To be able to identify.

As shown in FIG. 7, the scope connected by the discriminating circuit 28 is discriminated based on the output signal of the type signal generating circuit (for example, 27A) inputted to the discriminating circuit 28. The identification circuit 28 controls switching of the changeover switch 103 in addition to controlling both drivers 26a and 26b. For example, when the frame-sequential scope 2A or 2C is connected, it is switched to the frame-sequential side and the drive pulse of the driver 26a is applied to the solid-state image sensor 18 via the connector and read from the solid-state image sensor 18. The signal is input to the frame sequential process circuit 162.

On the other hand, if the frame-sequential scope 2A or 2C is not connected, the mosaic process circuit side is selected. The changeover switch 103 may be switched to the mosaic type side by detecting the case where the mosaic type scope 2B or 2D is connected.

The identification circuit 28 also sends a control signal to the timing generator 52a so that it can cope with any of the methods.

Further, the signal passed through the process circuit 162 or 41b may be output through the output circuit 80 shown in FIG. 6, for example.

This output circuit 80 is connected to the output terminal of the matrix circuit 44a and N
A 3-circuit 2-contact selector switch 81 is provided between the TSC encoder 45a and the 3-circuit 2-contact selector switch between the output terminal of the inverse matrix circuit 44b and the buffers 42b, 42b, 42b forming the driver. 82 is provided.

When one of the contact sides is turned on, the changeover switch 81 guides the signal of the matrix circuit 44a to the common NTSC encoder 45, and the NTSC encoder 45 converts the signal into an NTSC video signal and outputs it from the common NTSC output end 46. To do. Also,
When the other contact side is selected, the mosaic process circuit
The signal of 41b is led to the NTSC encoder 45 and output from the common NTSC output terminal 46.

On the other hand, with respect to the other changeover switch 82, when the frame-sequential side is selected, the output signal of the frame-sequential process circuit 162 passes from the common RGB output end 42 via the common buffers 42, 42, 42 forming a driver. Three primary color signals are output. Also,
When the mosaic type process circuit side is selected, the RGB output terminal 4 which is common to the three primary color signals R, G, B passed through the inverse matrix circuit 44b.
Output from 3.

Each of the changeover switches 81 and 82 can be manually changed over, or can be changed over in conjunction with each other. In addition, both the changeover switches 81, 82
In the process circuit 162, the type signal output from the connected scope is used, the type signal is identified by the identification circuit 28, and the identification signal causes the changeover switches 81 and 82 to perform signal processing corresponding to the connected scope. Or you can switch to 41b.

The output circuit 80 as shown in FIG. 6 may not be used, but the output end may be a frame sequential type and a mosaic type.

If the light source connector of the fiberscope 2E is connected to the light source device 151, the naked eye can be observed.

If only the light source connector of the fiberscope 2E is connected to the light source connector receiver 71, a monitor for indicating that the fiberscope 2E is connected is provided by providing a detection means for the connection. Is also good.

The output formats of the signals after the signal processing for the two color imaging methods are the same. In other words, the same color monitor 13 can be used because the three primary color outputs or the NTSC system video signal are matched. (This color monitor may be compatible with the three primary colors or one that inputs an NTSC video signal.) When the TV camera 8C or 8D is attached to the fiberscope 2E, the captured image is displayed on the color monitor 13. However, when the television camera 8C or 8D is detached, the detached state may be displayed on the screen of the color monitor 13. That is, for example, the fact that the fiberscope 2E is observing may be displayed, or a certain image may be displayed.

According to this embodiment, the light source unit is shared by both the frame-sequential type and the mosaic type, and it can be used by simply connecting a scope, which is convenient. Further, it is not necessary to newly provide a moving means for moving the light source section or the rotary filter section, and thus the cost can be reduced and the size can be reduced.

Further, in the above-mentioned embodiment, in the case of frame sequential illumination, R, W, and G are used, but the present invention is not limited to this. For example, R, G, W; W, G, B; Cy (cyan ), Ye (yellow), W; Cy, W, Mg
(Magenta); W, Ye, Mg, etc. can be used for illumination.

FIG. 10 to FIG. 12 relate to the second embodiment of the present invention.
FIG. 10 is a perspective view showing the outer appearance of an endoscope device including a light source device.
FIG. 11 is a block diagram showing a combined state of the frame sequential scope, and FIG. 12 is a block diagram showing a combined state of the mosaic scope.

In this embodiment, the control device 191 is separately provided, and the light source device 192 shared by all the scopes and the frame sequential video processor unit 193a shown in FIGS. 10 and 11 or the mosaic type video shown in FIG. It is composed of a processor unit 193b.
As shown in FIG. 10, a light source connector receiver 194 is provided on the lower front side of the light source unit 192, while a signal connector receiver 195 is provided on the upper front side of each video processor unit 193a or 193b. , These connector receivers 194, 195 are provided on the upper surface of the video processor unit 193a or 193b,
When 192 are piled up (in Fig. 10, one video processor unit 1
93a) is provided so as to be vertically adjacent to each other.

On the other hand, in the surface-equipped electronic scope 2A, the connector 197 has the light source connector portion and the signal connector portion integrated,
As shown in FIG. 10, the light source device 192 and the video processor unit 1
When 93a is overlapped, it can be connected to both connector receivers 194 and 195.

On the other hand, for example, the mosaic type electronic scope 2B has a connector divided into a light source connector 198 and a signal connector 199, and the connectors 198 and 199 are respectively connector receivers 194 and 1
Can connect to 95. Further, for example, also in the fiber-scope 2C with a frame sequential television camera, the light source connector 198 and the signal connector 200 can be connected to the connectors 194 and 195, respectively.

In the light source device 192 in this embodiment, as shown in FIGS. 11 and 12, a rotary filter unit 133 including a rotary filter 33a, a motor 32a for rotationally driving the rotary filter 33a, a rotary position sensor 51a, etc. is provided along rails 134, 134. It can be moved freely.

The rotary filter unit 133 is usually set at one end of the rails 134, 134. For example, as shown in FIG. 12, the rotary filter 33a is retracted from the light path of the light source lamp 31 and the lenses 34 ', 34'. In this state, the white light source section is formed. On the other hand, when the rotary filter unit 133 is moved to the upper side of the rails 134 and 134 from this state, it is inserted in the middle of the optical path as shown in FIG. 11 to form a frame sequential light source unit.

The light source device 192 has connectors 202, 2 of the cable 201 for sending the timing pulse of the timing generator 52a to a separate frame sequential video processor unit 193a.
A connector receiver 203 for connecting one of the 02 is provided, and the connector receiver 20 is similarly provided to the frame sequential video processor 193a.
Three are provided.

Further, the light source device 192 is provided with a connection detection circuit 204 for determining whether or not the connector 202 of the signal cable 201 is connected to the connector receiver 203, and as shown in FIG.
When 01 is connected, the movement control circuit 1
Outputs the movement command signal to 35 and turns the rotary filter 133 to rail 1.
Move along 34,134 and rotate the filter 33 in the middle of the illumination optical path.
Through a, it is possible to perform frame-sequential illumination.

On the other hand, a connection detection circuit 205 for determining whether or not the connector 202 of the cable 201 is connected to the connector receiver 203 is also provided in the frame sequential video processor unit 193a. This detection circuit 205
Is output to the warning circuit 66a. Then, the warning circuit 66a detects the connection of the field sequential scope 2A or 2C from the identification circuit 28a, and detects the connection detection circuit.
When a detection signal indicating that the cable 201 is not connected is input from 205, a warning buzzer 206a, a warning lamp 207a, and the like warn that the cable 201 is not connected. Also, a warning is issued when the signal connector 199 of the mosaic scopes 2B and 2D is connected to the signal connector receiver 195.

The timing pulse from the light source device 192 is transmitted through the cable 201 to the pulse generator 20 in the video processor unit 193a.
The control signal is output to the driver etc. via 8. Other configurations are similar to those of the light source device 151 shown in FIG.

Further, the mosaic type video processor unit 19 shown in FIG.
The 3b is provided with a warning circuit 66b which operates by the output of the identification circuit 28b, and when the warning circuit 66b is connected to the mosaic type signal connector receiver 195, the signal connector of the frame sequential scope 2A or 2C is connected. The buzzer 206b or the warning light 207b is used to warn that the connection is incorrect. Others are the same as those in the vicinity of the process circuit in the light source device 151 shown in FIG.

If the mosaic scope 2B or 2D or the fiberscope 2E is connected, the rotary filter unit
133 is not moved, so the white light of the source lamp 31
The light is focused and irradiated on the connector 198 through the lenses 34 'and 34'.

According to this embodiment, one light source device 192 can deal with a frame-sequential or mosaic scope or a fiberscope. In addition, as shown in the illustrated example, it is possible to select and use the video processor units 193a and 193b according to the scope to be used in combination with the light source device 192,
It can also be used with other video processors that are not associated with this light source device.

Although FIG. 11 shows a state in which the frame sequential electronic scope 2B is connected, its connector 197 is separated for convenience.

In the above embodiment, even if the connector is integrated as in the case of the frame sequential scope 2A, the mosaic scope 2B
You can connect even separate things like in the case of.

In FIG. 10, the connector 19 of the frame sequential electronic scope 2A is shown.
Although 7 for light source and 7 for signal are integrated, they may be separated as in the case of the mosaic electronic scope 2B. Conversely, connectors 198 and 19 of the mosaic type electronic scope 2B
9 may be integrated.

It is preferable that the connection detection circuits 204 and 205 are provided, but they are not always necessary.

Further, although the rotary filter unit 133 is movable in the above-mentioned embodiment, connector receivers for the field sequential light source and the white light source are separately provided, and the light source lamp 31 and the lens 3 are provided.
You may move 4'and 34 '.

In addition, the light source connector is shared and the light source lamp 3
1, the lenses 34 ', 34' and the connector receiver 194 may be moved.

Further, in the light source device 192, the rotation filter unit 133 may be moved manually regardless of the output of the connection detection circuit 204.

FIG. 13 is a block diagram showing a light source device according to the third embodiment of the present invention.

In this embodiment, similarly to the second embodiment, in the light source device 192 'which is separated from the video processor and is shared by the field sequential light source and the white light source, the rotary filter unit 133 of FIG. Rotary filter 1 shown in FIG. 8 as a rotary filter
The rotation / stop control circuit 161 (see FIG. 7) is used to control rotation / stop instead of using the movable structure. In this case, instead of the frame sequential process circuit 41a shown in FIG. 11, a frame sequential process circuit 162 shown in FIG. 9 is used.

This light source device 192 'is, as in the second embodiment, as shown in FIGS. 11 and 12, a frame sequential video processor section.
It can be used in combination with 193a or mosaic type video processor unit 193b.

According to the present embodiment, as in the second embodiment, one light source device 192 ′ is used, and a scope of a frame sequential type or a mosaic type,
Alternatively, a fiberscope can be dealt with, and a moving means for moving the light source unit and the rotary filter unit is not required, which enables cost reduction and size reduction.

14 and 15 show a rotary filter of the light source device according to the fourth embodiment of the present invention.

In this embodiment, as shown in FIG. 14, the filter frame 17
1 is provided with R, G, B color transmission filters 172R, 172G, 172B, and, for example, a white illumination hole 173 is provided in a light-shielding portion between the R, B color transmission filters 172R, 172B. This hole 173
The light-shielding plate 174 rotatably attached to the center of the line segment connecting the hole 173 and the center makes it possible to shield light.

That is, when the filter frame 171 is rotated by the motor 32a, the light-shielding plate 174 has a radial direction in which the center position of the disc-shaped light-shielding portion and the pivot point are connected by the centrifugal force, as shown in FIG. In this state, the hole 173 and the shading plate 1
The state is interrupted at 74, and normal R, G, B plane sequential illumination can be performed.

On the other hand, when stopped, the centrifugal force does not work, so that the light shielding plate 174 is retracted from the hole 173 by gravity as shown in FIG.

The position of the filter frame 171 is controlled so that the hole 173 is on the optical axis connecting the light source lamp and the lens 34 in the stopped state. For this position control, or for detecting the timing of reading the solid-state image sensor signal during the R, G, B frame sequential, the filter frame 171 is provided with a number of holes 175, 175 ... Light emitting elements and photosensors 176 are arranged on both sides of the plate surface to form a rotary encoder for position detection. In FIG. 14, the photo sensor 176 is attached to the tip of the sensor attachment plate 177.

In this embodiment, the motor 32a is controlled to rotate / stop by, for example, the rotation / stop control circuit 161 shown in FIG. 7, and the video processor side can have the same configuration as that shown in FIG. 7, for example. However, the frame sequential process circuit 16
Instead of 2, the frame sequential process circuit 41b shown in FIG. 9 is used.

Further, as shown in FIG. 13, the light source device may be separated from the video processor.

According to the present embodiment, the light source lamp can be shared without the need for moving means for moving the light source part and the rotary filter part, and the frame sequential illumination light becomes ordinary R, G, B, as shown in FIG. A conventional frame sequential process circuit as shown can be used.

 FIG. 16 shows a modification of the fourth embodiment.

In this example, the two slide plates 350 and 350 are provided on both sides of the hole 173 provided in the filter frame 171 in the rotation direction.
It is extended in the radial direction of 71. This slide plate 350,35
Between 0, a light shielding plate of a size that can cover the hole 173.
351 is slidably fitted in the radial direction of the filter frame 171. The light shielding plate 351 has one end attached to the other end of a spring 352 fixed to the filter frame 171 on the center side of the light shielding plate 351, and is biased toward the center by the spring 352. Further, a stopper pin 355 that restricts outward movement of the light shielding plate 351 is provided on the outer side of the hole 173 in the radial direction of the filter frame 171.

Then, in the state where the filter frame 171 is rotated by the motor 32a, the light shielding plate 351 moves outward in the radial direction of the filter frame 171 against the biasing force of the spring 352 by the centrifugal force, so that the hole 173 is formed. Now that the screen is blocked, normal R, G, B frame sequential illumination can be performed.

On the other hand, when the filter frame 171 is stopped, centrifugal force does not work, so the light blocking plate 351 moves to the inner side in the radial direction of the filter frame 171 by the spring 352 as shown in FIG.
It is designed to be retracted from the hole 173.

17 and 18 show another modification of the fourth embodiment.

In this example, in the rotary filter 170 ', a concave lens 180 is attached to the hole 173 of the filter frame 171 shown in FIG. 14, and the light source portion in a cross section passing through the hole 173 is as shown in FIG.

The concave lens 180 defocuses the illumination light focused on the end face of the light guide fiber when illuminated with white light so that the light guide fiber is not burned. When the concave lens 180 is not provided, that is, when the lens is passed through the filter, the light guide fiber end face is focused. In this case, since the light is dimmed by the filter, the end face of the light guide fiber is hardly burned. In addition, concave lens 180
Lens 34 or light source lamp 31 in the optical axis direction
May be moved (on the rail) to set the focus state in the case of illumination by white light and the focus state in the case of frame sequential.

Incidentally, in each of the above-described embodiments, a correction circuit means for correcting the temperature dependence of the light emission characteristics of the light source lamp 31 or the like may be provided.

Further, a color temperature conversion filter may be provided in the optical path of the illumination light from the light source lamp 31 according to the characteristics of the attached scope. Thus, when using the electronic scope, it becomes possible to select a light flux having an optimum energy distribution according to the spectral characteristics of the solid-state image sensor used.

It should be noted that different embodiments can be configured by combining some of the above-described embodiments and the like, and these also belong to the present invention.

Further, the light source device of the present invention is not limited to being used in combination with the video processor as in the above-mentioned embodiments, but may be used alone.

[Effects of the Invention] As described above, according to the present invention, a connector receiver to which a field-sequential light scope and a white light scope can be connected, and a plurality of specified light sources are provided in the light emission path of a light source that emits white light. Is provided with a rotating plate having a region for sequentially transmitting light in the wavelength region and a region for transmitting white light, and rotationally drives the rotating plate when a field sequential light scope is connected to the connector receiver. To emit the field sequential light, and when the white light scope is connected, by controlling the white light transmission region of the rotating plate to stop on the emission optical axis to emit the white light, to the connector receiver, Since it is possible to output illumination light and white light suitable for a scope having a field-sequential imaging means, a scope having a field-sequential imaging means, a scope having a color mosaic imaging means, and naked-eye observation There is an effect that illumination light suitable for a fiberscope capable of performing the above can be supplied.

[Brief description of drawings]

1 to 9 relate to a first embodiment of the present invention.
FIG. 1 is a perspective view showing the entire system of an endoscope apparatus including a light source device. FIG. 2 is an explanatory view showing the structure of a fiber-scope with a frame-sequential external turtle. FIG. 3 is a fiber-scope with a mosaic-type external camera. FIG. 4 is an explanatory view showing the configuration of a fiberscope, FIG. 5 is a block diagram showing the configuration of a mosaic process circuit, FIG. 6 is a block diagram showing the configuration of an output circuit, and FIG. FIG. 8 is a block diagram showing the constitution of a light source device, FIG. 8 is an explanatory diagram showing the constitution of a rotary filter, FIG. 9 is a block diagram showing the constitution of a frame sequential process circuit, and FIGS. 10 is a perspective view showing an appearance of an endoscope apparatus including a light source device, FIG. 11 is a block diagram showing a combined state of a frame sequential scope, and FIG. 12 is a mosaic scope according to the second embodiment. Block diagram showing the combination state of 13 is a block diagram showing the configuration of a light source device according to a third embodiment of the invention, FIGS. 14 and 15
FIG. 14 relates to a fourth embodiment of the present invention, FIG. 14 is a perspective view showing a rotary filter, FIG. 15 is an explanatory view showing another state of FIG. 14, and FIG. 16 is a modification of the fourth embodiment. 17 and 18 relate to another modification of the fourth embodiment, FIG. 17 is an explanatory view of the rotary filter, and FIG.
17 is a partial cross-sectional view of FIG. 151 …… Light source device 15e …… Light source section 2A …… Sequential electron microscope 2B …… Color mosaic electronic scope 2C …… Sequential fiber optic with TV camera 2D …… Color mosaic fiber optic with camera 2E… … Fiberscope 5A, 5B, 5C, 5D, 5E …… Light source connector 71 …… Light source connector receiving 72 …… Signal connector receiving 31 …… Light source lamp 152 …… Rotating filter

Claims (3)

[Claims] 1. A connector receiver to which a field-sequential light scope for performing observation in response to field-sequential light and a white-light scope for performing observation in response to white light can be connected; a light source for emitting white light; A rotating plate provided in the optical path of the emitted light of the light source, the rotating plate having a region for sequentially transmitting light in a plurality of specific wavelength regions and a region for transmitting white light; and a white light transmitting region of the rotating plate. A detection means for detecting that the light is positioned on the optical axis of the emitted light; and when the scope for sequential light is connected, the rotary plate is rotationally driven to emit sequential light.
Control means for controlling the white light transmission region of the rotary plate to stop on the optical axis and emit white light based on the detection means when the white light scope is connected. A characteristic light source device for an endoscope. 2. The light source device for an endoscope according to claim 1, wherein a region for sequentially transmitting a specific wavelength region of the rotary plate comprises a color separation filter. 3. The light source device for an endoscope according to claim 1, wherein the white light transmitting region of the rotary plate is a hole provided in the rotary plate.