JP5388730B2 - Endoscope light source device - Google Patents

Description

  The present invention relates to an endoscope light source device, and more particularly to an endoscope light source device including a plurality of light source lamps.

  In general, in order to diagnose or treat a patient's body, an endoscope that images the inside of the body with a solid-state imaging device provided at the tip, and a light source that supplies the endoscope with light for illuminating the observation site in the body An endoscope system including an apparatus and a video processor that processes an image signal picked up by an endoscope and outputs the processed image signal to a monitor has been put to practical use. It is also widely known that in an endoscope system, a video processor and a light source device are configured as an integrated device. In a light source device of a general endoscope system, a white lamp such as a halogen lamp or a xenon lamp is used as a light source lamp. The light amount of these light source lamps decreases with the passage of time. In particular, in the case of a halogen lamp that is cheaper than a xenon lamp, the lighting life is very short. For this reason, when the light source lamp is turned off due to the end of life or failure during the examination by the endoscope or the treatment, replacement with a new light source lamp is performed.

  Here, when the light source lamp is turned off during observation inside the body with the endoscope, the observation with the endoscope must be interrupted in order to replace the lamp. Such interruption of observation should be avoided as much as possible because it not only puts a burden on the patient but also reduces the diagnostic efficiency. Therefore, for example, Patent Document 1 proposes that an endoscope light source device is provided with two light source lamps so that when one of the light source lamps is cut off, it can be immediately switched to the other light source lamp. In such an endoscope light source device, two light source lamps are installed on a turntable, and a light source lamp optically connected to the endoscope is provided by manually operating an operation handle extending from the turntable. Can be switched. By using such an endoscope light source device, even if one of the light source lamps is cut off, it is possible to continue the observation by the endoscope without substantially interrupting.

  Patent Document 2 discloses an endoscope system having a configuration for notifying a user that a light source lamp needs to be replaced. In the endoscope system of this document, in the unit body including the light source unit and the video processor unit, the light source lamp is automatically detected to be cut off, and the observation is continued by switching to the sub light source lamp. In this case, the user is prompted to replace the lamp by displaying on the touch panel provided in the unit main body that the light source lamp needs to be replaced and a method for replacing the light source lamp. It is possible.

Japanese Utility Model Publication No. 7-27012 Japanese Patent No. 3771959

  However, usually, during endoscopic observation, the operator operates the endoscope while observing the in-vivo image displayed on the monitor. When one light source lamp (for example, lamp A) is cut off during observation, the light source lamp (for example, lamp B) is switched to the other light source and the subsequent observation is continued. For this reason, at the end of the observation, the operator may miss the lamp replacement warning displayed on the unit body or forget that it is necessary to replace the light source lamp. In such a case, observation using the lamp B is performed without replacing the lamp A that has been cut off. If the lamp B is also cut off during the observation, the observation is performed even if the lamp A is switched to the other lamp A. Will not be able to continue. In this way, when both lamps are turned off while the endoscope is inserted into the body, not only is the burden imposed on the patient due to the interruption of the observation, but also the state of the endoscope in the body is confirmed. This makes it difficult to remove the endoscope from the patient's body, which is also a problem in terms of safety.

  In addition, the actual replacement of the light source lamp is often performed not by an operator (doctor) who performs endoscopic observation after the observation is completed or during periodic inspection, but by an engineer or a nurse. Therefore, when the endoscope light source device includes a plurality of light source lamps, the person who actually replaces the light source lamps determines which of the plurality of light source lamps needs to be replaced. It was necessary to identify each item while checking one by one.

  Therefore, the present invention has been made in view of the above circumstances, and an object thereof is to provide an endoscope light source device capable of appropriately and easily replacing a light source lamp.

In order to solve the above problems, according to the present invention, there is provided an endoscope light source device for supplying illumination light to an endoscope, wherein a plurality of light source lamps and each of a plurality of light source lamps are cut off. Detecting means, and a display means for displaying on the monitor a warning screen for notifying that the light source lamp needs to be replaced. The display means includes a plurality of light source lamps in the detecting means. When it is detected that a light source lamp other than the main lamp arranged at a position for supplying illumination light to the endoscope is cut off, the endoscope is connected to the endoscope light source device. in this case, without displaying a warning screen on the monitor, when the endoscope is not connected to the endoscope light source device, an endoscope light source device characterized by displaying a warning screen on the monitor Is provided.

  With this configuration, when the endoscope is removed from the endoscope light source device in a state where at least one light source lamp is turned off, a warning screen can be displayed on the monitor. This makes it possible for the operator to recognize again that the light source lamp needs to be replaced at the end of the in-vivo observation, and all the light source lamps provided in the endoscope light source device are cut off during the observation. Can be prevented. In addition, when a person who does not perform in-vivo observation operates the light source device for an endoscope, if a lamp burnout is detected, a warning screen is displayed on the monitor, and the light source lamp needs to be replaced. It can be easily recognized.

  In addition, the endoscope light source device may further include a warning screen generation unit that generates a warning screen based on a detection result of the detection unit.

  The warning screen may include a display for specifying the position of the light source lamp that needs to be replaced and a display regarding a method for replacing the light source lamp. With this configuration, anyone can recognize at a glance which light source lamp needs to be replaced among a plurality of light source lamps, and can reduce labor in lamp replacement work. .

  In addition, when the detection unit detects that all of the plurality of light source lamps are cut off, the display unit displays the monitor regardless of whether the endoscope is connected to the endoscope light source device. A warning screen may be displayed. With this configuration, it is possible to prevent in-vivo observation when the light source lamps are all off.

  The warning screen may be deleted from the monitor when the endoscope is connected to the endoscope light source device. With this configuration, it is possible to prevent the display of the subject image from being hindered by the warning screen.

  Further, the warning screen may be continuously displayed on the monitor until it is detected by the detection means that none of the plurality of light source lamps is cut off. With this configuration, it is possible to prevent a situation in which all the light source lamps are cut off during in-vivo observation.

  The warning screen may be switched to a sub-screen display when the endoscope is connected to the endoscope light source device. With this configuration, the operator can recognize that the lamp needs to be replaced without hindering the display of the subject image during in-vivo observation.

  In addition, an opening for replacing the light source lamp is provided in the housing of the endoscope light source device, and the plurality of light source lamps have the light source lamp that needs to be replaced in the vicinity of the opening. The structure arrange | positioned in a housing so that it may be located may be sufficient. With this configuration, the light source lamp can be easily replaced from the opening.

  Therefore, according to the present invention, it is possible to accurately notify that the light source lamp needs to be replaced, and it is possible to facilitate the replacement work of the light source lamp.

It is an external view of a processor in an embodiment of the present invention. It is a figure which shows the internal structure of the processor in embodiment of this invention. It is a perspective view which shows the attachment state of the light source lamp in embodiment of this invention. It is a flowchart which shows the flow of in-vivo observation in embodiment of this invention. It is a figure which shows the example of the warning screen displayed on a monitor.

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

  FIG. 1 is an external view of a processor 20 including an endoscope light source device according to the present invention. As shown in FIG. 1, the processor 20 is covered with a casing 200, and the exterior side surface of the casing 200 covers an opening 201 used when replacing a light source lamp described later, and the opening 201. A lamp door 202 is provided. The lamp door 202 is detachably attached to the housing 200 with screws 203. Further, a lamp switching button 208 for switching the position of the light source lamp by rotating a turntable 214 described later is provided in the vicinity of the opening 201.

  Further, on the exterior front of the processor 20, a light guide connecting portion 204 for connecting a light guide of the endoscope, an electric connecting portion 205 for electrically connecting the endoscope to perform power supply and communication, A front panel 206 including various operation buttons for accepting operations by a user such as an operator, an indicator for displaying the operation status of the processor 20, and a main power switch 207 of the processor 20 are provided.

  FIG. 2 is an internal block diagram of the processor 20 shown in FIG. In FIG. 2, an endoscope 10 and a monitor 30 that are detachably connected to the processor 20 and constitute the endoscope system of the present embodiment together with the processor 20 are illustrated. The endoscope 10 and the monitor 30 are a display device having an electronic endoscope having a general image capturing function and a general image receiving function, and a detailed description thereof will be omitted.

  The processor 20 controls the control circuit 211 that controls each part of the processor 20. The image processing circuit 212 that performs predetermined image processing on the image signal sent from the endoscope 10 and outputs the image signal to the monitor 30. Two light source lamps 213a and 213b for supplying illumination light, a rotating platen 214 to which each light source lamp is attached, and a cooling fan 215 for preventing the lighted light source lamp from being air-cooled and storing heat above the limit temperature. And a lamp power source 216 for supplying power to each light source lamp. In addition, the processor 20 of this embodiment includes a detection circuit 217 that detects whether or not each light source lamp is off based on the energization state of the light source lamps 213a and 213b. Each part of the processor 20 is powered by a system power supply (not shown). An optical axis AX indicates an optical axis of a light guide (not shown) of the endoscope 10. Since the optical axis of the light guide serves as an index for positioning the light source lamp, the optical axis AX can be said to be the optical central axis of the processor 20.

  In this embodiment, a light source unit (light source lamps 213a, 213b, lamp power supply 216, etc.) for supplying illumination light to the endoscope 10 and an image signal generated by the endoscope 10 are processed. A configuration in which an image processing unit (such as the image processing circuit 212) is mounted in a single processor 20 is employed. However, it is not limited to the said structure, It is good also as a structure which made the light source part independent from the processor 20 as a single light source device.

  FIG. 3 is a perspective view showing a mounted state of the light source lamps 213a and 213b. Here, FIG. 3 is a view of the rotating plate 214 as viewed from the back side of the processor 20 (that is, the side opposite to the surface on which the front panel 206 is provided). In the following description, the direction parallel to the optical axis AX of the light guide is the optical axis direction, and the direction perpendicular to the bottom surface of the housing 200 is the vertical direction.

  As shown in FIG. 3, the rotating disk 214 has a disk shape and is formed of a metal plate such as aluminum. The turntable 214 is rotatably attached to a turntable support member 241 fixed to a base 240 attached to the bottom surface of the housing 200. Specifically, a shaft 214 a extending in the optical axis direction is provided at the center of the turntable 214, and the shaft 214 a is attached to a bearing (not shown) provided on the turntable support member 241. Thereby, the turntable 214 is rotatable about the shaft 214a as a central axis. At this time, the turntable 214 is arranged so that the mounting surfaces of the light source lamps 213a and 213b are accurately perpendicular to the optical axis AX. Furthermore, the turntable 214 is arranged at a position spaced from the light guide connecting portion 103 at an appropriate distance in the optical axis direction so that the light collecting point of the light source lamp that is emitting light substantially coincides with the incident end of the light guide. The

  Further, the rotary plate 214 is provided with two openings (not shown) so as not to block the irradiation light from the light source lamp, and the light source lamps 213a and 213b are respectively positioned in these openings, and the lamp It is fixed to the turntable 214 by a fixing member 242. The lamp fixing member 242 includes a guide member 242a attached to the turntable 214 and a slide member 242b attached by sliding on the guide member 242a. First, the light source lamps 213a and 213b are attached to the slide member 242b. The light source lamps 213a and 213b are fixed between the slide member 242b and the guide member 242a by sliding the slide member 242b with the light source lamp attached thereto onto the guide member 242a. Further, the light source lamps 213a and 213b can be removed by sliding the slide member 242b in the reverse direction and removing it from the guide member 242a.

  In the light source lamp fixed to the turntable 214, the optical axis of the illumination light emitted from one light source lamp and the optical axis AX of the light guide of the endoscope 10 coincide with each other. It arrange | positions in the position which retracts | saves from the optical axis position of a light guide. In the present embodiment, the light source lamp attached at a position where the optical axis of the illumination light to be irradiated coincides with the optical axis AX of the light guide of the endoscope 10 is used as the main lamp, and the optical axis position of the other light guide. A light source lamp that is mounted at a position where it is retracted from the projector is a spare lamp. That is, in FIGS. 2 and 3, the light source lamp 213a is a main lamp and the light source lamp 213b is a spare lamp.

  Further, the turntable 214 is connected to a turntable drive mechanism 243 such as a motor via a gear or the like. The turntable drive mechanism 243 rotates the turntable 214 by a predetermined rotation amount based on the operation of the lamp switching button 208. For example, when the light amount of the light source lamp 213a, which is the main lamp, decreases or is turned off, the operator switches the lamp switch button 208. Thereby, the turntable 214 is rotated by the turntable drive mechanism 243, the light source lamp 213a is retracted from the optical axis AX, and the light source lamp 213b is disposed on the optical axis AX. Thus, by rotating the turntable 214 by the turntable drive mechanism 243, the main lamp for supplying illumination light to the endoscope 10 can be switched efficiently in a short time.

  Further, the light source lamp that has become unable to emit light due to its life or the like is taken out from the opening 201 provided in the housing 200 of the processor 20 and replaced with a new lamp. Generally, in order to avoid an increase in size, the interior of the processor 20 is provided with a minimum space necessary for replacement. For this reason, it is very difficult to insert a hand into the housing 200 through the opening 201 and visually replace the light source lamp in a narrow work space. Therefore, in the present embodiment, the light source lamp that needs to be replaced is positioned in the vicinity of the opening 201 (lamp door 202). More specifically, when the main lamp is cut off during the observation by the endoscope 10 with the main lamp emitting light, the position of the light source lamp is adjusted by the rotating disk drive mechanism 243 as described above. Can be switched. As a result, for example, the light source lamp 213b, which was a spare lamp, moves to the position of the main lamp, and the light source lamp 213a, which is a cut main lamp, moves to the position of the spare lamp. Therefore, the position of the main lamp is set to a position far from the opening 201 and the position of the spare lamp is set to a position close to the opening 201 so that the light source lamp that needs to be replaced is moved to a position close to the opening 201. Can be made. As a result, the light source lamp can be easily replaced.

  Next, the flow of in-vivo observation in the endoscope system 1 as described above will be described. FIG. 4 is a flowchart showing the flow of in-vivo observation in the present embodiment. In this process, first, the main power switch 207 of the processor 20 is turned on (S1). Accordingly, the light source lamp 213a disposed at the position of the main lamp is supplied with power by the lamp power supply circuit 216 under the control of the control circuit 211.

  Subsequently, the detection circuit 217 determines whether or not the light source lamps 213a and 213b are detected to be out of lamp (S2). Here, in the present embodiment, it is determined that the lamp is out of the state where the filament, which is the light emitting portion of the light source lamp, is cut off due to the service life or the like and the light cannot be emitted. In order to detect the lamp burnout, a weak current is supplied from the lamp power supply circuit 216 not only to the light source lamp 213a (main lamp) to be used but also to the light source lamp 213b (spare lamp) that does not need to emit light at this time. Is done. As a result, the detection circuit 217 detects whether or not a current is flowing through the light source lamps 213a and 213b, and detects that the current is not flowing, that is, a state in which the filament is cut and is not energized as being out of lamp.

  Here, when it is determined by the detection circuit 217 that none of the light source lamps is cut off (S2: No), in-vivo observation by the endoscope 10 is performed using illumination light supplied from the light source lamp 213a. (S8). Specifically, first, light emitted from the light source lamp 213a is propagated through the light guide of the endoscope 10 inserted into the patient's body, and is emitted from the distal end of the insertion portion toward the observation target. Then, an image signal of a subject image corresponding to the intensity of light is generated by photoelectric conversion by an imaging element provided at the distal end of the endoscope 10. The image signal generated by the endoscope 10 is sent to the processor 20 at predetermined time intervals.

  In the processor 20, the image signal generated by the endoscope 10 is input to the image processing circuit 212 via the control circuit 211. In the image processing circuit 212, white balance and black balance adjustment, gamma correction, enhancement processing, and the like are performed on the image signal, and the image signal is output to the monitor 30. Then, a subject image based on the image signal is displayed on the monitor 30, and the patient's body cavity is observed from the subject image. Thereafter, the process returns to S2 again, and normal in-vivo observation is performed until the detection circuit 217 detects that the light source lamp has run out.

  On the other hand, if it is detected in S2 that the light source lamp has run out (S2: Yes), it is subsequently determined whether or not all the light source lamps included in the processor 20 are burned out (S3). Here, when two light source lamps 213a and 213b are provided as in the present embodiment, it is determined whether or not both of them are out of lamps. When all the light source lamps are not burned out, that is, when there is one lamp that can emit light (S3: No), it is subsequently determined whether or not the endoscope 10 is connected to the processor 20. (S4). Usually, at the end of observation, the endoscope 10 is detached from the processor 20. Therefore, it is determined here whether or not the endoscope 10 is currently being observed by determining whether or not the endoscope 10 is connected to the processor 20. Whether or not the endoscope 10 is connected to the processor 20 depends on a limiter switch provided in the light guide connection unit 204 and the electric connection unit 205, a communication result between the endoscope 10 and the control circuit 211, and the like. Judgment based on.

  If the endoscope 10 is currently being observed and the endoscope 10 is connected to the processor 20 (S4: Yes), it is determined whether or not the light source lamp whose lamp has run out is the main lamp (S5). . Here, when the light source lamp that has been out of lamp is the main lamp (S5: Yes), a display for notifying the surgeon of lamp out is performed (S6). Specifically, the control circuit 211 turns on an indicator provided on the front panel 206 of the processor 20 indicating that the light source lamp has been burned out. Note that when the main lamp in normal use is cut off, an image cannot be acquired by the endoscope 10, and some change occurs, for example, the display on the monitor 30 becomes dark. Therefore, the operator who operates the endoscope while observing the monitor 30 can easily recognize that the main lamp has run out, and the display on the front panel 206 in S6 can be omitted. is there.

  Thereafter, the operator operates the lamp switching button 208 to rotate the turntable 214. As a result, the light source lamp 213a, which is the main lamp, is retracted from the optical axis AX, and the light source lamp 213b, which is a spare lamp, is disposed on the optical axis AX. Thereby, the light source lamp 213b is switched to the main lamp, and the light source lamp 213a is switched to the spare lamp (S7). Then, after the light source lamp is switched, in-vivo observation by the endoscope 10 is performed using light emitted from the light source lamp 213b serving as the main lamp (S8). Thereafter, the process returns to S2.

  On the other hand, if it is determined in S5 that the lamp burnout is not detected in the main lamp, that is, if the spare lamp is burned out (S5: No), the process proceeds to S8 without switching the light source lamp, etc. In-vivo observation is performed with illumination light emitted from the main lamp.

  Further, when the lamp burnout is detected in S2 (S2: Yes), all the lamps are burned out (S3: Yes), and when the endoscope 10 is not connected to the processor 20 (S4: No), A warning screen is displayed on the display unit 30a of the monitor 30 (S9). FIG. 5 is a diagram showing a warning screen displayed on the monitor 30 of the present embodiment. As shown in FIG. 5, the warning screen of the present embodiment includes a warning display WD with characters and a lamp position display LD with drawings.

  The warning display WD includes not only that the light source lamp is burned out, but also an explanation regarding a method for replacing the light source lamp, precautions for replacement, and the like. Further, the lamp position display LD includes the arrangement of the light source lamps in the processor 20, and further, in the arrangement of the light source lamps, it is possible to identify which one of the plurality of light source lamps needs to be replaced. Display is included. For example, it is possible to change the color of only the light source lamp that needs to be replaced. In the case of FIG. 5, only the lamps that need to be replaced are displayed with hatching.

  Further, the warning screen displayed on the monitor 30 is generated by the control circuit 211 based on the detection result of the lamp burnout by the detection circuit 217, and is stored in a memory (not shown) provided in the control circuit 211. When all the lamps are off (S3: Yes) and when the endoscope 10 is not connected to the processor 20 (S4: No), the warning screen data is read from the memory and output to the monitor 30. To display.

  Then, after displaying the warning screen, it is determined whether or not the main power switch 207 of the processor 20 is turned off (S10). When the main power switch 207 of the processor 20 is not turned off (S10: No), the processing from S2 to S10 is repeated. Thereafter, in a state where the light source lamp is replaced and at least one light source lamp capable of emitting light is provided (S3: No), when the endoscope 10 is connected and in-vivo observation is started (S4: Yes), the monitor 30 The warning screen is erased and a subject image in normal in-vivo observation is displayed. On the other hand, when all the lamps are burned out without replacing the light source lamp (S3: Yes), or when the endoscope 10 is not connected even when the light source lamp is replaced (S4). : No), the warning screen continues to be displayed.

  Then, when the main power switch 207 of the processor 20 is turned off (S10: Yes), the in-vivo observation process in the endoscope system 1 ends. In the flowchart of FIG. 4, in addition to the determination in S10, the in-vivo observation process ends with an interrupt when the main power switch 207 is turned off.

  As described above, the present embodiment is configured to display a warning screen on the monitor 30 when the endoscope 10 is removed from the processor 20 in a state in which at least one light source lamp is turned off. As a result, when the endoscope 10 is removed from the processor 20 in order to end the in-vivo observation, the operator can be made to recognize again that the light source lamp needs to be replaced. Further, even when an engineer who does not perform in-vivo observation turns on the main power switch 207 of the processor 20 during periodic inspections, etc., if the processor 20 detects that the lamp has run out, a warning screen is displayed on the monitor 30. Is displayed. Thereby, an engineer etc. can recognize easily that replacement | exchange of a light source lamp is required.

  Even when the warning screen is displayed on the monitor 30, the endoscope 10 is connected, the in-vivo observation is started, and the warning screen is erased. The display can be prevented from being hindered. Thus, by giving priority to the display of the in-vivo observation image, in-vivo observation can be performed even when there is no time to replace the lamp in an emergency or the like.

  Furthermore, in addition to a warning message notifying that the lamp has been cut off, the warning screen displays a light source in the processor 20 so that it can identify which light source lamp needs to be replaced among a plurality of light source lamps. A layout of the lamps is included. Therefore, by confirming the warning screen, it becomes possible for anyone to identify which light source lamp needs to be replaced at a glance, and the labor for lamp replacement work can be reduced.

  The above is the embodiment of the present invention. However, the present invention is not limited to the above embodiment, and various modifications are possible within the scope of the technical idea of the present invention. For example, the above embodiment relates to a case where two light source lamps are attached to a rotating disk, but the present invention is not limited to this. For example, the present invention can also be applied to a case where three or more light source lamps are attached to a turntable or a mechanism other than a turntable capable of switching a plurality of lamp positions is used.

  In the above embodiment, even when the warning screen is displayed on the monitor 30, the endoscope 10 is connected, the in-vivo observation is started, and the warning screen is erased. For example, the warning screen may be displayed on the monitor 30 and the in-vivo observation cannot be performed until the detection circuit 217 does not detect that the lamp has run out. With this configuration, it is possible to prevent a situation in which all the light source lamps are cut off during in-vivo observation.

  In addition, the endoscope 10 is connected to start in-vivo observation, and the warning screen can be displayed as a sub-screen, or the warning screen can be generated translucently and superimposed on the in-vivo image. As a result, it is possible to prompt the operator to replace the lamp while the endoscope 10 in the body can be confirmed.

DESCRIPTION OF SYMBOLS 10 Endoscope 20 Processor 30 Monitor 211 Control circuit 212 Image processing circuit 213a, 213b Light source lamp 214 Turntable 215 Cooling fan 216 Lamp power supply 217 Detection circuit

Claims (8)

An endoscope light source device for supplying illumination light to an endoscope,
A plurality of light source lamps;
Detecting means for detecting whether each of the plurality of light source lamps is cut off;
Display means for displaying a warning screen for notifying that the light source lamp needs to be replaced on a monitor, wherein the display means is the detection means, wherein the endoscope out of the plurality of light source lamps is provided. When it is detected that a light source lamp other than the main lamp disposed at a position for supplying illumination light to the lamp is cut off, and the endoscope is connected to the endoscope light source device It does not display the warning screen on the monitor, when the endoscope is not connected to the endoscope light source device for an endoscope, characterized in that to display the warning screen on the monitor Light source device.   The endoscope light source device according to claim 1, further comprising a warning screen generation unit that generates the warning screen based on a detection result of the detection unit.   The endoscope light source device according to claim 1, wherein the warning screen includes a display for specifying a position of a light source lamp that needs to be replaced.   The endoscope light source device according to any one of claims 1 to 3, wherein the warning screen includes a display regarding a method of replacing the light source lamp. The warning screen, when the endoscope is connected to the endoscope light source device, characterized in that it is erased from the monitor, claimed in any one of claims 4 Endoscope light source device. The warning screen, at the detection means, to be not expired any of the plurality of the light source lamp is detected, characterized in that continuously displayed on the monitor, any of claims 1 to 4 The endoscope light source device according to claim 1. The warning screen, when the endoscope is connected to the endoscope light source device, characterized in that it is switched to the sub-screen display, claimed in any one of claims 4 Endoscope light source device. The housing of the endoscope light source device is provided with an opening for replacing the light source lamp,
Wherein the plurality of light source lamp, as the light source lamp replacement is needed is located in the vicinity of the opening, characterized in that it is disposed within the housing, one of claims 1 to 7 The endoscope light source device according to one item.

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