JP4694285B2 - Endoscope light source device - Google Patents

Description

  The present invention relates to an endoscope light source device suitable for an endoscope, an electronic endoscope, and the like.

  2. Description of the Related Art In recent years, electronic endoscope apparatuses are used by connecting a processor incorporating a light source device to an electronic scope having an electronic camera mounted on the tip and a fiberscope for observation only with an optical member. In particular, electronic scopes are variously formed and used so as to have fineness and function suitable for various parts to be observed. In such a processor that enables connection of various electronic scopes and fiberscopes, the light source device must also be compatible with various electronic scopes and fiberscopes. Therefore, in the conventional light source device, the light source device is formed so that the necessary light amount can be supplied to the electronic scope having the largest necessary light amount.

The light source device has a configuration in which illumination light emitted from a high-intensity lamp is incident on a light guide of a scope, usually an incident end surface of an optical fiber bundle, by a condenser lens. Since the amount of illumination varies depending on the type of electronic scope and varies depending on the observation site, the light source device is equipped with a diaphragm device that mechanically adjusts the amount of light. The diaphragm device has a size that can block all light from the light source lamp, and has a diaphragm in which a tip part with a notch part is formed integrally with an arm part, and mechanically at the tip part of the arm part. An apparatus configured with a connected motor is known. When the motor rotates, the diaphragm rotates about the tip of the arm portion as an axis, and the amount of illumination light is adjusted (Patent Document 1). On the other hand, a plurality of aperture openings having different aperture ratios or transmittances are provided in the light shielding plate, and the aperture openings are selectively positioned between the light source device and the incident end face of the light guide (in the illumination optical path). It is also possible to limit the amount of light incident on the light.
JP 2003-305008 A

As the light source device, a high-intensity lamp such as a metal haloid lamp or a xenon lamp is used, but as the luminance of the lamp increases, a heat component included in the illumination light increases. Therefore, depending on the type of scope, if the light amount of the light source device is not reduced, not only will the amount of light be excessive, but the temperature at the tip of the scope may increase due to the thermal component of the illumination light. In particular, in the case where the brightness of the image is adjusted by the electronic shutter speed without operating the aperture device, an image having an appropriate brightness is obtained by increasing the electronic shutter speed, but the amount of illumination light is too large. There was a risk that the temperature of the tip of the light guide, that is, the tip of the scope would rise. There was a similar risk when adjusting the brightness manually.
Further, conventionally, since the light source can be turned on even if the scope is not connected, the illumination light leaks from the light guide connection port in the maximum amount state, which may cause trouble.

  The present invention has been made in view of the prior art, and regulates the amount of illumination light according to the amount of illumination allowed by the connected scope, and enables safe use even in a scope where the amount of illumination light is unknown. It is an object of the present invention to provide an endoscope light source device that can reduce the influence of leakage of illumination light in a state where it is not.

The present invention that achieves such an object is an endoscope light source device that makes illumination light from a light source incident on an incident end face of a connected light guide, and includes a plurality of at least three or more of different allowable illumination light amounts When one of the plurality of scopes is connected to the connection means and the connection means capable of selectively connecting a scope, the allowable illumination light quantity of the scope is read from the storage means provided in each of the connected scopes A plurality of apertures having a reading means and a plurality of apertures having different aperture ratios or transmittances corresponding to the permissible illumination light amounts of the plurality of scopes, and the plurality of apertures between the incident end surface and the light source A diaphragm means for selectively setting any one of the above, and any one of the plurality of scopes is connected to the connection means so that the reading means reads the allowable illumination light quantity. In this case, the diaphragm unit is set with a diaphragm aperture having an aperture ratio or transmittance corresponding to the read allowable illumination light quantity among the plurality of diaphragm apertures, and any of the plurality of scopes is connected to the connection unit. When the reading unit cannot read the allowable illumination light amount, the control unit causes the diaphragm unit to set a diaphragm aperture having a minimum aperture ratio or transmittance among the plurality of diaphragm apertures. It is said.
More specifically, the plurality of scopes can include a first scope having a maximum allowable illumination light amount, a second scope having an intermediate allowable illumination light amount, and a third scope having a minimum allowable illumination light amount, The plurality of apertures are first, second, and third having different aperture ratios or transmittances corresponding to the maximum, middle, and minimum allowable illumination light amounts of the first, second, and third scopes. A third aperture opening can be provided.

When the main switch that supplies power to the control unit is turned on, the control unit has, as an initialization process, the aperture unit having a minimum aperture ratio or transmittance among the plurality of aperture apertures. Can be set.

As the information regarding the allowable illumination light amount, identification information that is measured and set in advance in terms of light amount and temperature can be used.

One embodiment of the diaphragm means includes a disk in which the plurality of diaphragm openings are formed at a predetermined interval on a circumference having a rotation axis as a center, and a drive means for rotationally driving the disk. And the control means drives the driving means so that any one of the plurality of aperture openings crosses an illumination optical path between the incident end face and the light source.

In a preferred embodiment, the apparatus includes a main switch that supplies power to the control unit, and the control unit is configured such that, when the main switch is turned on , any one of the plurality of aperture openings has the incident end surface, the light source, and the light source. The driving means is driven so as to cross the illumination light path between the two.

The endoscope light source device of the present invention preferably includes a display unit that displays whether or not the reading unit has read the allowable illumination light quantity .

  As described above, according to the present invention, a diaphragm aperture having an aperture ratio or transmittance corresponding to information of a connected scope is selected, and control is performed so that the selected aperture ratio or diaphragm aperture is not set. Even if a scope is connected, the temperature at the tip of the scope does not rise excessively due to excessive light intensity, and even when a scope with a small maximum light intensity is connected, not only can a sufficient light intensity be obtained, but if information cannot be read, Since an aperture ratio or transmittance lower than the maximum aperture ratio or the maximum transmittance of the diaphragm means is selected, there is no excessive light quantity.

  Embodiments of the invention will be described below with reference to the accompanying drawings. FIG. 1 is a front view of a processor incorporating an embodiment of a power supply apparatus to which the present invention is applied, and FIG. 2 is a plan view showing main components inside the processor cut along a cutting line III-III in FIG. .

  On the front side of the processor 10, there are provided a scope insertion slot 11 into which a connector of the electronic scope is inserted, and a scope lock lever 12 that locks the inserted connector so as not to come off. The scope insertion port 11 is a connector for connecting a connection pin or the like of an electronic scope. A light guide insertion port 13 to which a light guide connector of an electronic scope or a fiber scope is connected is provided below the scope insertion port 11. Is provided.

  Further, an operation panel 14 is provided in front of the processor 10 at a position lateral to the scope insertion slot 11. The operation panel 14 has a lamp switch 16, an image quality adjustment switch (image quality adjustment button) 17, and a dimming selection. Operation switches such as a switch (dimming selection button) 18, a manual adjustment switch 19, and a scope information display unit 20 are provided. Further, a memory card slot 21 and a main switch 15 for mounting a removable memory card are provided below the operation panel 14.

Inside the processor 10, a rotary diaphragm plate 50 is disposed at the back position of the light guide insertion slot 13. The rotary diaphragm plate 50 is provided with a plurality of aperture openings having different aperture ratios in the circumferential direction of the disk, and any one of the diaphragm openings is inserted from the light guide insertion opening 13 by the diaphragm plate drive motor 22. The light guide 113 is rotationally driven so as to face the incident end face 113a. A condenser lens L is disposed at a position opposite to the incident end face 113a with the rotary diaphragm plate 50 interposed therebetween, and a lamp light source 23 is disposed behind the condenser lens L. The lamp light source 23 has a built-in high-intensity lamp 35, and the illumination light emitted from the lamp 35 is focused by the condenser lens L, and the light beam that has passed through one of the aperture openings of the rotary diaphragm plate 50 is incident on the end face. It enters into 113a. The vicinity of the incident end surface 113a of the light guide 113 is fixed in a metal light guide sleeve 114.

  Further, a lamp power source 24 having an igniter 25 for lighting the lamp light source 23 is arranged inside the processor 10, and a cooling fan 26 for cooling the lamp power source 24 is provided on the rear panel of the processor 10.

  In the processor 10, the memory card slot 21 is electrically connected to the memory card inserted in the memory card slot 21, and the memory card read / write control, for example, the information written in the memory card is read, or the processor 10 A card substrate 27 is provided as an interface circuit for writing information such as image information processed in step 1 to a memory card. Further, in the processor 10, the memory card substrate 27, the control circuit for controlling the entire operation of the processor 10 such as the control of the diaphragm drive motor 22, and the storage information from the storage means of the electronic scope in which the connector is inserted into the scope insertion slot 11. The control board 28 on which an image processing circuit and the like are mounted, which drives the image sensor of the electronic scope, processes the video signal obtained by driving, and displays the image signal on a monitor display or the like. The video signal processed by the control board 28 is output from a video connector or the like (not shown) mounted on the back panel board 29, and a predetermined video is displayed on a monitor display (not shown) connected to the video connector or the like. .

  In FIG. 3, the main part of the circuit configuration of the processor 10 is shown in blocks. A scope interface 31 is provided in the scope insertion slot 11. To the scope interface 31, an information connector for reading information written in a memory mounted on the electronic scope, a video connector for transmitting a clock for driving an image sensor such as a CCD, and inputting a video signal output from the image sensor, etc. A plurality of connectors are provided. Each connector is connected to a corresponding terminal such as a terminal of a control circuit 41 provided on the control board 28.

The scope lock switch 32 is a detection switch that detects that the scope lock lever 12 is turned to the locked state. A status signal of the scope lock switch 32 is input to the control circuit 41.
The aperture plate drive motor 22 that rotationally drives the rotary aperture plate 50 is driven and controlled by the control circuit 41. Thus, the rotational position of the rotary diaphragm plate 50 is detected by the diaphragm position sensor 33, and a detection signal is input to the control circuit 41.

  The lamp light source 23 is turned on by an igniter 25 of a lamp power source 24 that is turned on / off under the control of the control circuit 41. The lamp light source 23 is provided with a fan 23 a for cooling the lamp, and the fan 23 a is driven and controlled by the control circuit 41. An igniter 25 that drives the lamp light source 23 to light is driven by a lamp power source 24 that uses an AC input 37, usually a commercial AC power source.

  The AC input 37 is also input to a system power supply 38 that outputs a constant voltage for driving an electronic circuit such as the control circuit 41. The control circuit 41 is activated when the main switch 15 is turned on and starts processing. When the lamp switch 16 is turned on, the control circuit 41 transmits a lamp-on signal to the lamp power source 24 and passes the lamp through the igniter 25. The light source 23 is turned on.

  The control circuit 41 reads information relating to the diaphragm from the memory means of the electronic scope via the scope interface 31 and selects the maximum aperture ratio of the rotary diaphragm plate 50 when adjusting the illumination light quantity. In this case, the scope interface 31 functions as reading means.

  Further, the control circuit 41 executes an imaging process of driving an imaging device of the electronic scope via the scope interface 31 and inputting an image signal from the imaging device. Further, the control circuit 41 performs predetermined image signal processing and displays it on the monitor television 43 or writes the image signal to the memory card 42 via the card substrate 27. The control circuit 41 starts imaging processing when the main switch 15 is turned on and starts up, but the imaging processing is usually executed by an image processing circuit separate from the control system.

  The control circuit 41 is connected to input means such as a keyboard via the I / F circuit 39, and can be configured to input individual information necessary for endoscopy using the keyboard or the like.

  FIG. 4 is a diagram showing an outline of a main part of an electronic scope connectable to the processor of FIG. In FIG. 4, the electronic scope 100 includes a flexible insertion portion 101 and an operation portion 102, and includes a connector 104 at the distal end of a universal tube 103 extending from the operation portion 102. A CCD sensor 105 and a light distribution lens L1 for illumination light are disposed at the distal end portion of the flexible insertion portion 101. The CCD sensor 105 is connected to a CCD drive circuit 107 provided in the operation unit 102 via a video line 106 routed in the insertion unit 101. The CCD drive circuit 107 is further connected to a signal pin provided in the connector 104 by a video line routed through the operation unit 102 and the universal tube 103. An EEPROM 109 storing information such as the type of the electronic scope 100 is mounted in the operation unit 102, and a read / write line 110 connected to an input / output terminal of the EEPROM 109 is connected to a signal pin in the connector 104. Further, the operation unit 102 is provided with a function button 111 for operations such as moving image shooting and still image shooting, and a switch line 112 connected to the contact of the function button 111 is connected to a signal pin in the connector 104. Has been.

  An exit end face 113b of the light guide 113 is disposed behind the light distribution lens L1. The light guide 113 is guided to the connector 104 through the insertion portion 101, the operation portion 102, and the universal tube 103, and is inserted and fixed in a light guide sleeve 114 that protrudes from the connector 104. An incident end face 113a of the light guide 113 faces the open end face of the light guide sleeve 114.

  In the EPROM 109 mounted on the electronic scope 100, information for identifying at least the scope type is written. In this embodiment, as the type of scope, the maximum illumination light amount, that is, the maximum light amount that may be emitted from the light guide 113 is classified into a plurality of groups step by step. In this embodiment, three groups of type A, type B, and type C are set in order of large light quantity.

  FIG. 5 is a diagram for explaining the vicinity of the light source device of the processor 10. In FIG. 5, the rotary diaphragm plate 50 is disposed between the incident end face 113 a of the light guide sleeve 114 (light guide 113) inserted from the light guide insertion opening 13 and the condenser lens L disposed in front of the lamp light source 23. Is arranged. The incident end face 113a is normally disposed at a position that is orthogonal to the lamp 35 of the lamp light source 23 and the optical axis O of the condenser lens L and that is displaced far from the focal point F of the condenser lens L. The substantially parallel illumination light emitted from the lamp 35 is converged to the focal point F by the condenser lens L, and the light beam transmitted through the rotary diaphragm plate 50 is converged to the focal point, and then diffused and incident on the incident end face 113a. The illumination light beam incident from the incident end face 113a is guided through the light guide 113 and emitted from the emission end face 113b (FIG. 4) of the light guide 113 disposed at the distal end portion of the in-body insertion portion 101, and the light distribution lens L1 (FIG. ) To diffuse and illuminate the subject.

FIG. 6 is a front view of a rotary diaphragm plate which is an embodiment of the diaphragm of the light source device. In FIG. 6, the rotary diaphragm plate 50 is made of an aluminum disk 50 a, and the center of the disk 50 a serves as the rotation center 50 b and is fixed to the rotation shaft of the diaphragm plate drive motor 22. Further, the disk 50a has twelve openings at a predetermined interval (center angle interval of 30 degrees) on the circumference centered on the rotation center 50b. In this embodiment, the first diaphragm opening 51a to the eleventh diaphragm opening 51k and the auxiliary A lamp opening 53 is formed. The first aperture opening 51a has an aperture ratio of 75% , and the aperture ratio is set to decrease stepwise clockwise from the first aperture opening 51a. The aperture ratios of the second diaphragm opening 51b to the eleventh diaphragm opening 51k are 50%, 35%, 25%, 18%, 13%, 9%, 7%, 5%, 3.5%, and 2%, respectively. . However, the auxiliary lamp opening 53 has an opening ratio of 100%.

  Here, type A in the electronic scope 100 is set with a stop aperture 51a having a maximum stop aperture ratio of 75%, type B is set with a stop aperture 51b with a maximum stop aperture ratio of 50%, and type C is set with a stop aperture 51c with a maximum stop aperture ratio of 35%. It corresponds to the amount of light.

  In this embodiment, the first diaphragm opening 51a to the eleventh diaphragm opening 51k have a large number of small holes 52 formed at predetermined intervals in the opening region, and the illumination light is transmitted through these small holes 52, and the small holes 52 are also small. It is formed so as to be shielded from light by the surface of the disc 50 a that regulates the hole 52.

In the configuration in which the aperture ratios are different, the density (interval) of the small holes 52 is different in one embodiment, and the density (interval) is constant and the diameter is different in other embodiments. In this embodiment, both density (interval) and diameter are different. The shape of the small holes is arbitrary, and small holes having different shapes may be formed in each of the apertures, or the apertures of small holes having different shapes may be formed. Further, if the shape of the small hole is circular, it is easy to form the small holes with different diameters, but polygons or other shapes may be used. If a polygon is used, it is easy to increase the circular aperture ratio.

  The rotary diaphragm plate 50 is driven stepwise by the diaphragm plate drive motor 22. The diaphragm drive motor 22 is preferably a stepping motor. In this embodiment, a stepping motor having a step angle of 0.75 degrees is used. That is, when the aperture plate drive motor 22 rotates by 40 steps, the rotary aperture plate 50 rotates 30 degrees by one aperture opening.

  The rotary aperture plate 50 has an aperture position hole 54 for detecting the initial rotation position. When the rotary aperture plate 50 is in the initial rotation position, the aperture position is detected so that the aperture position hole 54 is detected. A sensor 33 (FIG. 5) is provided. The aperture position sensor 33 is, for example, a photocoupler. When the rotary aperture plate 50 is stopped at the initial position, the aperture position hole 54 opens the optical path of the photocoupler. Otherwise, the disc 50a is the photocoupler. The optical path is configured to be blocked. The initial position in this embodiment is a state in which the third diaphragm opening 51c is located in the illumination optical path.

  Further, the processor 10 is provided with an auxiliary illumination 44 that operates when the lamp 35 of the lamp light source 23 is extinguished for some reason such as a lifetime. When the control circuit 41 detects that the lamp 35 has been extinguished, the auxiliary illumination drive mechanism 45 (FIG. 5) is actuated to advance the auxiliary illumination 44 into the illumination optical path and turn it on. At that time, the control circuit 41 rotates the rotary diaphragm plate 50 so that the auxiliary lamp opening 53 advances into the illumination optical path.

  Next, the operation of the electronic endoscope apparatus will be described with reference to the flowcharts shown in FIGS. This process is an operation of the control circuit 41, and the control circuit 41 enters the power-on process when the main switch 15 is turned on.

  In the power-on process, first, the state of the rotary diaphragm plate 50 is initialized (step (hereinafter abbreviated as “S”) 11). In the present embodiment, the initialization process is to rotate the rotary diaphragm plate 50 so that the third diaphragm opening 51c having a diaphragm aperture ratio of 35% enters the illumination optical path.

  Next, it is checked whether or not a scope is attached (S13). In this embodiment, the determination is made based on whether or not the scope lock switch 32 is on. When the scope is attached (S13; YES), scope-processor communication is executed between the attached electronic scope and the processor, and scope information is input (S14). The scope information includes at least information related to the amount of illumination light, in this embodiment, scope types A to C.

  Next, it is checked whether or not communication with the scope is possible (S15). If communication is not possible (S15; YES), “no scope” is displayed on the scope information display unit 20 or the monitor television 43 (S16), and the maximum aperture ratio is set to 35% (S29). If communication is not possible (S15; NO), the processing after S17 based on the input scope information, whether it is scope type A (S17), whether it is scope type B (S21), scope type C (S25) is executed.

  When the scope type is A (S17; YES), the maximum aperture ratio 75% is selected (S19), and when the scope type B is (S21; YES), the maximum aperture ratio 50% is selected ( If it is scope type C (S23), if it is scope type C (S17; NO, S21; NO, S25; YES), the maximum aperture ratio 35% is selected (S29). When none of the scope types A, B, and C is present (S17; NO, S21; NO, S25; NO), the scope information display unit 20 or the monitor television 43 displays that it is “incompatible scope” ( S27), a maximum aperture ratio of 35 percent is selected (S29). The maximum aperture ratio selected here is the maximum aperture ratio in the automatic light control process and the manual light control process, and an aperture ratio higher than the selected maximum aperture ratio is not set. This restriction prevents heat generation due to excessive illumination light.

  The rotary diaphragm plate 50 is rotated stepwise so as to be any one of the first to twelfth diaphragm openings 51a to 51k that matches the maximum diaphragm aperture ratio selected in S19, S23, and S29 (S31). When the first to twelfth aperture openings 51a to 51k matching the set maximum aperture ratio are set, it is checked whether or not the lamp switch 16 is operated in a state where the lamp 35 is not lit (S33). The check is repeated while 16 is not operated (S33; NO, S33). In this embodiment, the lamp switch 16 is a momentary switch, and the control circuit 41 is turned on when operated with the lamp 35 not lit, and is operated with the lamp 35 lit. This is a configuration to turn off the light.

  When the lamp switch 16 is operated (S33; YES), the lamp 35 is turned on (S35). Then, it is checked whether or not the image quality adjustment switch is turned on (S37). If the image quality adjustment switch is turned on, the image quality adjustment is executed and the process proceeds to S41 (S37; YES, S39, S41). If the adjustment switch is not turned on, the image quality adjustment is skipped and the process proceeds to S41 (S37; NO, S41).

  In S41, it is checked whether automatic dimming is selected by the dimming selection switch 18 or manual dimming is selected.

  If automatic light control is selected (S41; automatic light control), whether the brightness is increased, decreased, or not is checked based on the brightness of the subject image measured by the photometry circuit (S43). When the brightness is increased (S43; up), that is, when the exposure is adjusted to the over side, it is checked whether or not the electronic shutter is set to 1/60 second of the lowest speed (S45). If it has already been set to 1/60 seconds, the shutter speed cannot be further reduced, so the process proceeds to S62 as it is (S45; YES, S62). If it is not set to 1/60 seconds (S45; NO), the electronic shutter is shifted to the low speed side (S47) and the process proceeds to S62.

  When the brightness is reduced (S43; down), that is, when the exposure is adjusted to the under side, it is checked whether the electronic shutter maximum speed is set (S49), and the electronic shutter maximum speed is set (S49). If the electronic shutter speed is not set at the maximum speed (S49; NO), the electronic shutter is shifted to the high speed side (S51) and then proceeds to S62.

  If the brightness is to be maintained (S43; hold), that is, if the exposure is not adjusted, the process proceeds directly to S62.

  When manual dimming is selected (S41; manual dimming), the manual adjustment switch 19 checks whether the brightness is increased, decreased, or unchanged (S53). When manual light control is selected, the electronic shutter speed is fixed at 1/60 seconds in this embodiment.

  When brightness up is selected by the manual adjustment switch 19 (S53; up), it is checked whether or not the aperture ratio is set to the maximum value. When the aperture ratio is set to the maximum value (S55; YES), the process proceeds to S62 as it is. If the aperture ratio is not set to the maximum value (S55; NO), the rotary aperture plate 50 is shifted (rotated) by one step to the large aperture ratio (S57) and the process proceeds to S62.

  When the brightness reduction is selected by the manual adjustment switch 19 (S53; NO), it is checked whether or not the aperture opening ratio is set to the minimum value (S59), and if it is set to the minimum value (S59). YES), the process proceeds to S62 as it is, and when the minimum value is not set (S59; NO), the rotary diaphragm plate 50 is shifted (rotated) by one step to the small aperture ratio side (S61) to S62. .

  If none is selected by the manual adjustment switch 19 (S53; hold), the process proceeds to S62 as it is.

  In S62, it is checked whether or not the scope has been removed, that is, whether or not the scope lock switch 32 has detected unlocking. If the scope is removed (S62; YES), the maximum aperture ratio is set to 35% and the process proceeds to S64. If the scope is not removed (S62; NO), the process proceeds to S64.

In S64, it is checked whether or not the lamp switch 16 is operated while the lamp 35 is lit. If the lamp switch 16 is not operated (S64; NO), the process returns to S37, and the lamp switch 16 is operated (S64). ; YES) turns off the lamp 35 (S65) and returns to S33.
When the main switch 15 is turned off, the lamp is turned off by the interruption process and the process is exited.

  As described above, according to the embodiment of the present invention, the amount of illumination light is limited according to the electronic scope type connected to the processor 10, so that even if an electronic scope with a large maximum amount of light is connected, the distal end of the endoscope due to excessive light amount Even when an electronic scope with a small maximum light amount is connected, a sufficient light amount can be obtained.

  In addition, when an electronic scope or fiberscope that does not have information corresponding to the scope types A to C is attached, an aperture ratio smaller than the maximum aperture ratio is set, so there is no fear of temperature increase due to excessive light quantity. Furthermore, since the aperture ratio smaller than the maximum aperture ratio is set even when it is determined that the scope is not connected, the amount of light is small even if the illumination light leaks from the light guide insertion port 13, and the influence on the surroundings is small. In addition, in such a case, a display indicating that the scope is incompatible and a display indicating that the scope is not attached are displayed, so that the user can easily grasp the situation.

It is a front view showing an outline of an embodiment of a processor to which an endoscope light source device of the present invention is applied. It is a top view which cuts along the cutting line III-III of FIG. 1, and shows a principal part with a block. It is a figure which shows the main circuit of embodiment of the processor with a block. It is a figure which shows the outline | summary of the principal part of the electronic scope connectable to the processor. It is a figure explaining the mode of the light source device vicinity of the processor. It is a front view of the rotary aperture plate which is embodiment of the aperture_diaphragm | restriction of the light source device. It is a figure which shows the control action regarding the illumination of the processor with a flowchart. It is a figure which shows the control action regarding the illumination of the processor with a flowchart.

Explanation of symbols

10 Processor 11 Scope Insert 12 Scope Lock Lever 13 Light Guide Insert 15 Main Switch 16 Lamp Switch 21 Memory Card Slot 22 Diaphragm Drive Motor 23 Lamp Light Source 24 Lamp Power Supply 31 Scope Interface (Reading Means)
32 Scope lock switch 33 Aperture position sensor 35 Lamp 38 System power supply 41 Control circuit (control means)
42 Memory card 43 Monitor TV 50 Rotating diaphragm plate 51a 51b 51c 51d 51e 51f 51g 51h 51i 51j 51k Aperture opening 113 Light guide 113a Incident end face 114 Light guide sleeve

Claims (7)

An endoscope light source device that makes illumination light from a light source incident on an incident end face of a connected light guide,
A connection means capable of selectively connecting a plurality of scopes of at least three or more, wherein the allowable illumination light quantity is different in stages;
When one of the plurality of scopes is connected to the connection means, a reading means for reading the allowable illumination light quantity of the scope from the storage means provided for each of the connected scopes;
A plurality of aperture openings having different aperture ratios or transmittances corresponding to the permissible illumination light amounts of the plurality of scopes are provided, and any one of the plurality of aperture openings is provided between the incident end surface and the light source. Means for selectively setting one, and
When any one of the plurality of scopes is connected to the connection unit and the reading unit reads the allowable illumination light amount, the aperture corresponding to the read allowable illumination light amount among the plurality of aperture openings is provided to the aperture unit. A diaphragm aperture having a ratio or a transmittance, and when none of the plurality of scopes is connected to the connection means and the reading means cannot read an allowable illumination light amount, the diaphragm means has a plurality of aperture openings. Control means for setting a diaphragm aperture having the smallest aperture ratio or transmittance,
An endoscope light source device comprising: 2. The endoscope light source device according to claim 1, wherein the plurality of scopes are a first scope having a maximum allowable illumination light amount, a second scope having an intermediate allowable illumination light amount, and a third scope having a minimum allowable illumination light amount. The plurality of apertures have different aperture ratios or transmittances corresponding to the maximum, middle, and minimum allowable illumination light amounts of the first, second, and third scopes. An endoscope light source device including first, second, and third apertures. 3. The endoscope light source device according to claim 1 or 2, wherein the control unit includes the plurality of apertures as an initialization process when the main switch that supplies power to the control unit is turned on. An endoscope light source device that sets a diaphragm aperture having a minimum aperture ratio or transmittance among apertures. The endoscope light source device according to any one of claims 1 to 3 , wherein the information related to the allowable illumination light amount is identification information that is measured and set in advance in terms of light amount and temperature. The endoscope light source device according to any one of claims 1 to 4 , wherein the diaphragm means includes a plurality of diaphragm openings each having a plurality of diaphragm openings formed at predetermined intervals on a circumference around a rotation axis. And a driving means for rotationally driving the disk, wherein the control means is arranged so that any one of the plurality of aperture openings crosses an illumination optical path between the incident end face and the light source. Endoscopic light source device for driving The endoscope light source device according to claim 5 includes a main switch that supplies power to the control unit, and the control unit has one of the plurality of aperture openings when the main switch is turned on. An endoscope light source device that drives the driving means so as to cross an illumination optical path between the incident end face and a light source. The endoscope light source device according to any one of claims 1 to 6, further comprising display means for displaying whether or not the reading means has read an allowable illumination light quantity .

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