JP5458735B2 - Lighting device - Google Patents

Description

  The present invention relates to a lighting device.

  A technique is known in which the temperature rise of the Fresnel lens is suppressed by air-cooling the Fresnel lens of the strobe (see, for example, Patent Document 1). Further, a technique for measuring a strobe booster circuit using a contact temperature sensor is known (see, for example, Patent Document 2).

JP 2007-192971 A JP 2007-227347 A

  Provided is an illuminating device capable of performing temperature management with high accuracy by actually measuring the temperature of an optical member that transmits the illumination light in a region through which the illumination light passes without blocking an optical path of the illumination light emitted from a light source. This is the issue.

  In order to solve the above problems, in the first aspect of the present invention, a light source unit (140) that emits illumination light, an optical member (160) that transmits illumination light emitted from the light source unit, There is provided a lighting device (100) including a temperature sensor (190) that is disposed apart from an optical member and measures the temperature of the optical member in a non-contact manner.

  It should be noted that the above summary of the invention does not enumerate all the necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

  According to the present invention, the temperature management is performed accurately by actually measuring the temperature of the optical member that transmits the illumination light in the passage area of the illumination light without blocking the optical path of the illumination light emitted from the light source. An illumination device that can be provided can be provided.

It is a perspective view which shows the illuminating device 100. FIG. It is a perspective view which shows the illuminating device 100. FIG. 1 is a side sectional view showing an illumination device 100. FIG. 4 is a side sectional view showing a movable housing 130. FIG. It is a sectional side view which shows the movable housing | casing 230 of the illuminating device which concerns on other embodiment. It is a sectional side view which shows the movable housing | casing 330 of the illuminating device which concerns on other embodiment. It is a longitudinal cross-sectional view which shows typically the structure of the imaging device 200 with which the illuminating device 100 was mounted | worn. It is a perspective view which shows typically the structure of the imaging device 300 which concerns on other embodiment.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 is a perspective view showing a lighting device according to the present embodiment. As shown in this figure, the lighting device 100 includes a fixed casing 110 and a movable casing 130 that are connected to each other.

  The fixed housing 110 includes an attachment portion 120 disposed on the lower end surface, an auxiliary light source 111 and a remote ready light 113 disposed on the front surface. The mounting portion 120 includes a mounting leg 122 that fits into the hot shoe of the camera body, and an interlocking contact 124 that transmits a signal in the hot shoe. The fixed housing 110 is fixed to the camera body with the mounting legs 122 fitted to the hot shoe.

  The auxiliary light source 111 is covered with a transparent cover 115 and emits light according to the operation mode. For example, the auxiliary light source 111 illuminates the subject when an autofocus operation is performed in a dark shooting environment. In addition, when the ready light 113 for remote operation is performed at a position away from the illumination device 100, the remote ready light 113 notifies the completion of charging to a main capacitor described later.

  The movable housing 130 includes a flash generation unit 140 disposed on the front surface in the illustrated state, and a lock release button 136 disposed on the side surface. In addition, the movable housing 130 includes a wide-angle diffuser 141 and a catchlight reflector 143 on the front side of the flash generator 140. The wide-angle diffusing plate 141 and the catchlight reflecting plate 143 can be accommodated inside the movable casing 130, and arranged on the front surface of the flash generating unit 140 as needed, or accommodated inside the movable casing 130. Is done.

  The movable casing 130 includes a horizontal rotation unit 132 and a vertical rotation unit 134 that are disposed in the vicinity of the rear end. The lower end of the horizontal rotation unit 132 is coupled to the upper end surface of the fixed housing 110, and the upper end of the horizontal rotation unit 132 is coupled to the movable housing 130 via the vertical rotation unit 134. In other words, the movable casing 130 is coupled to the fixed casing 110 through the horizontal rotation section 132 and the vertical rotation section 134 so as to be rotatable in the horizontal direction and the vertical direction. Accordingly, the subject can be illuminated directly with the flash generation unit 140 directed toward the subject, and the subject can be illuminated with indirect light with the flash generation unit 140 directed away from the subject.

  The horizontal rotation unit 132 and the vertical rotation unit 134 are stopped at a predetermined rotation position by being locked by a lock mechanism, and are rotated when the lock release button 136 is operated by the user. . This prevents the movable housing 130 from being inadvertently turned.

  The flash generation unit 140 includes a Fresnel lens 160 disposed on the front surface of the movable housing 130. The flash generation unit 140 includes a discharge tube, which will be described later, disposed inside the movable casing 130, and irradiates flash light emitted from the discharge tube in a direction orthogonal to the Fresnel lens 160.

  FIG. 2 is a perspective view showing the lighting device 100 from the back side. As shown in this figure, a display unit 202 and an operation unit 204 are arranged on the back surface of the fixed housing 110. The display unit 202 includes a liquid crystal display panel 114 and a ready light 116. The operation unit 204 includes a plurality of buttons 118 and a dial 119.

  FIG. 3 is a side sectional view showing the lighting device 100. As shown in this figure, the fixed housing 110 includes a battery chamber 112, a battery 180 accommodated in the battery chamber 112, and an electronic circuit 182 that operates with power supplied from the battery 180. The electronic circuit 182 includes a later-described CPU that controls the lighting device 100, a communication device that controls communication with the camera body, and the like, as well as a booster circuit that generates a high voltage to be supplied to the flash generator 140.

  In addition to the flash generator 140, the movable housing 130 also includes a main capacitor 138 that supplies power to the flash generator 140. The main capacitor 138 is quickly charged by the high voltage applied from the booster circuit of the electronic circuit 182. In addition, when a flash generation command is received from the electronic circuit 182, it is rapidly discharged.

  The flash light generation unit 140 includes a discharge tube 142 that generates flash light, such as a xenon tube, and a reflector 144 that reflects the flash light generated by the discharge tube 142. The discharge tube 142 discharges and generates flash when a high voltage is applied from the main capacitor 138. Moreover, the reflector 144 is opened toward the front side of the flash light generation unit 140, and emits the flash light emitted from the discharge tube 142 toward the front side of the flash light generation unit 140. The flash optical axis L1 passes through the center of the Fresnel lens 160.

  In addition, the movable casing 130 incorporates a moving mechanism 150 that moves the flash generation unit 140 in the direction of the optical axis L1 of the flash. The moving mechanism 150 includes a motor 152, a ball screw 154 rotated by the motor 152, and a support portion 156 that supports the flash generation unit 140 on the ball screw 154.

  The motor 152 is disposed on the upper rear side of the moving area 151 of the flash generating unit 140. The rotation axis of the motor 152 is arranged in parallel with the optical axis L1, and the rotation axis and the ball screw 154 are integrally formed. That is, the ball screw 154 extends from the rear upper side of the moving region 151 to the front side in parallel with the optical axis L1.

  The support portion 156 is a plate material, and the upper end of the support portion 156 is screwed into the ball screw 154, and the lower end of the support portion 156 is coupled to the upper surface of the reflector 144. The support portion 156 is slidably fitted to a guide bar disposed in parallel with the ball screw 154. For this reason, when the ball screw 154 is rotated by the motor 152, the support part 156 and the flash light generation part 140 move in the direction of the optical axis L1.

  In addition, a partition wall 139 that partitions the flash generation unit 140 and the main capacitor 138 is disposed inside the movable housing 130. The partition wall 139 extends to the lower end of the Fresnel lens 160 on the lower side of the moving region 151.

  Here, the lower portion of the moving region 151 in the partition wall 139 includes a rear portion 146 extending in parallel with the optical axis L1 from the rear end of the moving region 151 to the center in the front-rear direction, and from the center in the front-rear direction of the moving region 151 to the front end. And a front portion 145 extending incline toward the side away from the optical axis L1. The front portion 145 is formed with a recess 147 that is recessed toward the side away from the optical axis L, and a temperature sensor 190 is disposed in the recess 147. The temperature sensor 190 is an infrared radiation thermometer that receives infrared light emitted from a measurement object and measures the temperature of the measurement object from the amount of light received.

  The light receiving surface 191 of the temperature sensor 190 is directed toward the center of the Fresnel lens 160. That is, the measurement optical axis L2 extending in the normal direction from the central portion of the light receiving surface 191 of the temperature sensor 190 reaches the central portion of the Fresnel lens 160 and intersects the optical axis L1. For this reason, the light receiving surface 191 of the temperature sensor 190 receives infrared light emitted from the central portion of the Fresnel lens 160. And the temperature sensor 190 measures the temperature of the center part of the Fresnel lens 160 from the received light quantity.

  FIG. 4 is a side sectional view showing the movable housing 130. As shown in this figure, the Fresnel lens 160 includes a condensing region 162 that is a rectangular region centered on the central portion thereof, and a diffusion region 164 surrounding the condensing region 162. The condensing region 162 has the same area and the same shape as the front end of the reflector 144, and condenses the flash light emitted from the discharge tube 142. On the other hand, the diffusion region 164 diffuses flash light emitted from the discharge tube 142.

  Here, the temperature sensor 190 is arranged so that the measurement optical axis L2 reaches the center of the Fresnel lens 160, that is, the center of the light collection region 162. Further, the detection angle φ of the temperature sensor 190 is set so narrow that the detection range is limited to the light collection region 162. Further, the concave portion 147 in the front portion 145 is disposed below the optical path 149 of the flash light, and the light receiving portion of the temperature sensor 190 disposed in the concave portion 147 exists outside the optical path 149 of the flash light. In addition, the light receiving unit of the temperature sensor 190 exists below the moving region 151 of the flash generating unit 140, that is, outside the moving region 151.

  The electronic circuit 182 described above includes a CPU 166, a light emission control circuit 168, and a motor driver 170. The CPU 166 controls the entire lighting device 100. The light emission control circuit 168 includes a booster circuit that controls the discharge and charging of the main capacitor 138, and a light source control circuit that performs on / off switching of light emission of the discharge tube 142, adjustment of the light emission amount, and the like. . In addition, the motor driver 170 performs on / off switching, rotation direction switching, and the like of the motor 152.

  The temperature sensor 190 is connected to the CPU 166 and outputs a measurement result to the CPU 166. When the measured value by the temperature sensor 190 is equal to or greater than the threshold value, the CPU 166 outputs a command for prohibiting light emission of the discharge tube 142 and prohibiting discharge of the main capacitor 138 to the light emission control circuit 168. Further, the CPU 166 displays a warning display on the display unit 202 or generates a warning sound from the speaker when the measured value by the temperature sensor 190 is equal to or greater than the threshold value.

  Here, as shown by the broken line in the drawing, the flash generating unit 140 is moved to the front end (hereinafter referred to as the wide end) in the moving region 151, and the front end of the reflector 144 is connected to the Fresnel via a minute gap. Opposite the lens 160. In this state, the measurement optical axis L2 of the temperature sensor 190 and the flash generation unit 140 overlap. On the other hand, as shown by the solid line in the figure, the flash generating unit 140 is retracted from the detection range of the temperature sensor 190 while moving from the wide end to the rear end (hereinafter referred to as the tele end) in the moving region 151.

  When the flash generation unit 140 is positioned at the wide end, the CPU 166 stops temperature measurement by the temperature sensor 190 or stops control based on the measurement value of the temperature sensor 190. Then, after the flash emission of the discharge tube 142 is stopped, the CPU 166 outputs a drive signal to the motor driver 170 to operate the motor 152 to move the flash generation unit 140 to the tele end or to an intermediate position in the moving region 151. Retreat. Thereafter, the CPU 166 starts temperature measurement by the temperature sensor 190 or starts control based on the measurement value of the temperature sensor 190.

  As described above, in the illumination device 100 according to the present embodiment, the non-contact type temperature sensor 190 receives the radiated light emitted from the light collection region 162 of the Fresnel lens 160 and collects the light from the amount of light received. The temperature of the area 162 is measured. Here, by measuring the temperature of the Fresnel lens 160 using the non-contact type temperature sensor 190, the temperature sensor 190 can be arranged outside the optical path 149 of the flash light emitted from the discharge tube 142. ing.

  Thus, the temperature of the Fresnel lens 160 that transmits the flashlight can be measured without blocking the optical path 149 of the flashlight emitted from the discharge tube 142. Therefore, it is possible to accurately control the temperature of the Fresnel lens 160 without impairing the illumination function of the illumination device 1000.

  Further, since the light receiving portion of the temperature sensor 190 can be disposed outside the optical path 149 of the flash light emitted from the discharge tube 142, an increase in the ambient temperature of the temperature sensor 190 can be suppressed. Therefore, the error component of the measurement value of the temperature sensor 190 can be reduced, and thus the accuracy of the temperature measurement of the Fresnel lens 160 by the temperature sensor 190 can be improved.

  Further, the temperature increase in the condensing region 162 through which the optical axis L1 in the Fresnel lens 160 passes is larger than that in the surrounding diffusion region 164. Here, the measurement optical axis L2 of the temperature sensor 190 is directed to the light collection region 162 through which the optical axis L1 of the Fresnel lens 160 passes, and the detection range of the temperature sensor 190 is limited to the light collection region 162. Therefore, in the illuminating device 100 which concerns on this embodiment, since the highest temperature in the Fresnel lens 160 can be detected, the thermal destruction of the Fresnel lens 160 can be suppressed effectively.

  In addition, since the temperature sensor 190 is arranged outside the movement path of the flash generation unit 140, it is possible to prevent the temperature sensor 190 from restricting the movable range of the flash generation unit 140. In particular, it is possible to prevent the range of movement of the flash generation unit 140 toward the wide end from being limited by the temperature sensor 190.

  When the flash generation unit 140 exists at a position overlapping the measurement optical axis L2 of the temperature sensor 190, the CPU 166 causes the movement mechanism 150 to move the flash generation unit 140 to a position off the measurement optical axis L2. The temperature measurement of the Fresnel lens 160 by the temperature sensor 190 is started. Thereby, the temperature of the flash generation unit 140 is measured by the temperature sensor 190, and the CPU 166 can be prevented from performing erroneous control based on the temperature.

  Moreover, in the illuminating device 100 which concerns on this embodiment, the measurement point which rises to the highest temperature of the Fresnel lens 160 can be measured. That is, the temperature of the measurement point can be actually measured rather than inferred from the temperatures of other measurement points set away from the outer periphery of the measurement point. Therefore, the temperature control of the measurement point that rises to the maximum temperature of the Fresnel lens 160 can be performed with high accuracy.

  In the present embodiment, an infrared radiation temperature sensor that receives infrared light and measures the temperature of the measurement object from the amount of the received light is used as the temperature sensor 190. However, as the temperature sensor 190, other radiation temperature sensors that receive visible light and measure the temperature of the measurement object from the amount of the received light can also be applied. Further, although a xenon tube that emits flash light as illumination light is used as the discharge tube 142, an LED may be used.

  FIG. 5 is a side sectional view showing a movable housing 230 of a lighting device according to another embodiment. As shown in this figure, in the movable casing 230, the temperature sensor 190 is arranged so that the measurement optical axis L2 reaches the boundary between the light collection region 162 and the diffusion region 164.

  Here, the area and shape of the condensing region 162 are equivalent to the area and shape of the front end of the reflector 144, respectively. Further, the temperature sensor 190 is arranged outside the moving path of the reflector 144. For this reason, the measurement optical axis L2 of the temperature sensor 190 reaches the boundary between the condensing region 162 and the diffusion region 164 without being blocked by the reflector 144 positioned at the wide end. Therefore, in the illuminating device according to the present embodiment, the measurement optical axis L2 of the temperature sensor 190 can reach the Fresnel lens 160 regardless of the position of the flash generation unit 140 in the optical axis L1 direction. Can be measured in real time at any time (always).

  FIG. 6 is a side sectional view showing a movable housing 330 of a lighting device according to another embodiment. As shown in this figure, in the movable housing 330, the temperature sensor 190 is arranged so that the measurement optical axis L2 reaches the boundary between the light collection region 162 and the diffusion region 164 outside the movement region 151. . Further, a temperature sensor 192 is disposed on the telephoto end side of the recess 147 from the temperature sensor 190. The temperature sensor 192 is arranged so that the measurement optical axis L3 passes through the moving region 151 and intersects the optical axis L1. For this reason, in the illumination device according to the present embodiment, at least one of the measurement optical axis L2 of the temperature sensor 190 and the measurement optical axis L3 of the temperature sensor 192 is irrelevant to the presence position of the flash generation unit 140 in the optical axis L1 direction. Then, the Fresnel lens 160 is reached.

  When the flash generation unit 140 is positioned at the wide end, the CPU 166 performs light emission control of the flash generation unit 140 and a warning to the user based on the measurement value of the temperature sensor 190. On the other hand, the CPU 166 controls the light emission of the flash generation unit 140 based on the measurement value of the temperature sensor 192 and the warning to the user when the flash generation unit 140 moves back to the position deviated from the measurement optical axis L2 of the temperature sensor 190. To implement.

  Thereby, in the illuminating device according to the present embodiment, the temperature of the Fresnel lens 160 can be measured regardless of the position of the flash generation unit 140 in the direction of the optical axis L1. In addition, since the temperature of the central portion of the Fresnel lens 160, that is, the temperature of the measurement point rising to the maximum temperature can be detected in real time at any time (always), the reliability of temperature management of the Fresnel lens 160 can be improved.

  FIG. 7 is a vertical cross-sectional view schematically showing the structure of the imaging device 200 to which the illumination device 100 is attached. As shown in this figure, the imaging apparatus 200 includes a lens unit 410 and a body 460.

  The lens unit 410 is detachably attached to the body 460 via the mount 450. The lens unit 410 includes an optical member 420, a lens barrel 430 that houses the optical member 420, and a motor 401 that is provided inside the lens barrel 430 and drives the optical member 420. On the other hand, the body 460 has an optical system including a main mirror 540, a pentaprism 470, and an eyepiece optical system 490.

  The main mirror 540 is located between a standby position inclined on the optical path of incident light incident through the lens unit 410 and an imaging position (indicated by a dotted line in the figure) that rises while avoiding incident light. Moving. The main mirror 540 at the standby position guides most of the incident light to the pentaprism 470 disposed above. Since the pentaprism 470 emits a reflection of incident light toward the eyepiece optical system 490, the image on the focusing screen 472 can be viewed as a normal image from the eyepiece optical system 490.

  The remainder of the incident light is guided to the photometric unit 480 by the pentaprism 470. The photometric unit 480 measures the intensity and intensity distribution of incident light. A half mirror 492 that superimposes the display image formed on the finder liquid crystal 494 on the image from the focusing screen 472 is disposed between the pentaprism 470 and the eyepiece optical system 490.

  The main mirror 540 has a sub mirror 542 on the back surface of the incident light incident surface. The sub mirror 542 guides part of the incident light transmitted through the main mirror 540 to the distance measuring unit 530 disposed below. Thereby, when the main mirror 540 is in the standby position, the distance measuring unit 530 measures the distance to the subject. When the main mirror 540 is moved to the photographing position, the sub mirror 542 is also retracted from the optical path of the incident light.

  Further, a shutter 520, an optical filter 510, and an image sensor 500 are sequentially arranged behind the main mirror 540 with respect to incident light. When the shutter 520 is opened, the main mirror 540 moves to the shooting position immediately before, so that the incident light goes straight and enters the image sensor 500. Thereby, an image formed by incident light is converted into an electrical signal.

  On the other hand, the lens unit 410 has an optical system including a front lens 422, a compensator lens 424, a focusing lens 426, and a main lens 428, which are sequentially arranged in the lens barrel 430 from an incident end corresponding to the left side in the drawing. The optical system is accommodated in the lens barrel 430. Further, an iris unit 440 is disposed between the focusing lens 426 and the main lens 428.

  Further, the lens unit 410 includes a motor 401 inside the lens barrel 430. The motor 401 is arranged in the middle of the lens barrel 430 in the optical axis direction and below the focusing lens 426 having a relatively small diameter. Thereby, the diameter of the lens barrel 430 is accommodated in the lens barrel 430 without enlarging, and the focusing lens 426 is advanced or retracted in the optical axis direction.

  The body 460 includes a control unit 550 at a position inside the body 460 and out of the optical path of the optical system. The control unit 550 not only controls the operation of each part inside the body 460 but also controls the operation of the motor 401 inside the lens unit 410 by transmitting and receiving electrical signals via the mount 450.

  The lighting device 100 is mounted by fitting the mounting leg 122 to the accessory shoe 560 provided on the top of the body 460. As a result, the fixed housing 110 formed integrally with the mounting portion 120 is fixed to the body 460. In addition, it is possible to communicate with the control unit 550 on the body 460 side via the interlocking contact 124 of the lighting device 100.

  The control unit 550 notifies the illumination device 100 of information such as the distance to the subject and the exposure detected by the distance measuring unit 530 on the body 460 side via the interlocking contact 124. Thereby, the illumination device 100 controls the light emission amount and the like in addition to the light emission timing in conjunction with the operation of the body 460.

  FIG. 8 is a perspective view schematically showing the structure of another imaging device 300. As shown in this figure, the imaging device 300 further includes a lighting device 100 in a body 460 including a shutter 462, a mode dial 464, a lens barrel 430, and the like. The illumination device 100 is disposed on the upper side of the lens barrel 430 in the body 460.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  The order of execution of each process such as operations, procedures, steps, and stages in the apparatus, system, program, and method shown in the claims, the description, and the drawings is particularly “before” or “prior to”. It should be noted that the output can be realized in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the description, and the drawings, even if it is described using “first”, “next”, etc. for convenience, it means that it is essential to carry out in this order. It is not a thing.

DESCRIPTION OF SYMBOLS 100 Illumination device, 110 Fixed housing | casing, 111 Auxiliary light source, 112 Battery chamber, 113 Ready light for remote control, 114 Liquid crystal display panel, 115 Cover, 116 Ready light, 118 button, 119 Dial, 120 Mounting part, 122 Mounting leg, 124 Interlocking contact point, 130 Movable housing, 132 Horizontal rotation part, 134 Vertical rotation part, 136 Lock release button, 138 Main capacitor, 139 Bulkhead, 140 Flash generation part, 141 Wide-angle diffuser, 142 Discharge tube, 143 Catch light Reflector, 144 Reflector umbrella, 145 Front part, 146 Rear part, 147 Concave part, 149 Optical path, 150 Movement mechanism, 151 Movement area, 152 Motor, 154 Ball screw, 156 Support part, 160 Fresnel lens, 162 Condensing area, 164 Diffusion area 166 C U, 168 Light emission control circuit, 170 Motor driver, 180 Battery, 182 Electronic circuit, 190, 192 Temperature sensor, 191 Light receiving surface, 200 Imaging device, 202 Display unit, 204 Operation unit, 230 Movable housing, 300 Imaging device, 330 Movable housing, 401 motor, 410 lens unit, 420 optical member, 422 front lens, 424 compensator lens, 426 focusing lens, 428 main lens, 430 lens barrel, 440 iris unit, 450 mount, 460 body, 462 shutter, 464 mode Dial, 470 Penta prism, 472 Focusing screen, 480 Metering unit, 490 Eyepiece optical system, 492 Half mirror, 494 Finder liquid crystal, 500 Image sensor, 510 Optical Filter, 520 Shutter, 530 Distance measuring unit, 540 Main mirror, 542 Sub mirror, 550 Control unit, 560 Accessory shoe

Claims (7)

A light source that emits illumination light;
An optical member that transmits illumination light emitted from the light source unit;
A temperature sensor that is spaced apart from the optical member and measures the temperature of the optical member in a non-contact manner;
Bei to give a,
The temperature sensor is arranged outside the optical path of the illumination light emitted from the light source unit,
The temperature sensor is a radiation temperature sensor that receives light emitted from the optical member and measures the temperature of the optical member from the amount of received light.
The optical member includes a condensing region through which an optical axis of the light source unit passes and a diffusion region provided around the condensing region,
An illumination apparatus , wherein a measurement optical axis of the temperature sensor extends toward the light collection region . A moving mechanism for moving the light source unit in the direction of the optical axis of the illumination light and moving it forward and backward with respect to the optical member;
The lighting device according to claim 1, wherein the temperature sensor is arranged outside a moving path along which the light source unit is moved by the moving mechanism. A light source that emits illumination light;
An optical member that transmits illumination light emitted from the light source unit;
A temperature sensor that is spaced apart from the optical member and measures the temperature of the optical member in a non-contact manner;
A moving mechanism for moving the light source unit in the direction of the optical axis of the illumination light and moving it forward and backward with respect to the optical member;
With
The temperature sensor is disposed outside a moving path along which the light source unit is moved by the moving mechanism,
The temperature sensor is a radiation temperature sensor that receives light emitted from the optical member and measures the temperature of the optical member from the amount of received light.
The optical member includes a condensing region through which an optical axis of the light source unit passes and a diffusion region provided around the condensing region,
An illumination apparatus, wherein a measurement optical axis of the temperature sensor extends toward the light collection region. A light source that emits illumination light;
An optical member that transmits illumination light emitted from the light source unit;
A temperature sensor that is spaced apart from the optical member and measures the temperature of the optical member in a non-contact manner;
A moving mechanism for moving the light source unit in the direction of the optical axis of the illumination light and moving it forward and backward with respect to the optical member;
With
The temperature sensor is disposed outside a moving path along which the light source unit is moved by the moving mechanism,
The measurement optical axis of the temperature sensor extends to the optical member through the moving range of the light source unit,
When the light source unit exists at a position overlapping the measurement optical axis of the temperature sensor, the moving mechanism moves the light source unit to a position off the measurement optical axis of the temperature sensor, and then the temperature. An illumination device further comprising a control unit that starts temperature measurement of the optical member by a sensor. 4. The temperature sensor according to claim 1, wherein the measurement optical axis of the temperature sensor is disposed at a position where the optical sensor reaches the optical member regardless of the position of the light source unit . 5. The lighting device according to item 1 . A light source that emits illumination light;
An optical member that transmits illumination light emitted from the light source unit;
A temperature sensor that is spaced apart from the optical member and measures the temperature of the optical member in a non-contact manner;
With
The temperature sensor is arranged outside the optical path of the illumination light emitted from the light source unit,
A moving mechanism for moving the light source unit in the direction of the optical axis of the light source unit and moving it forward and backward with respect to the optical member;
The temperature sensor is
The measurement optical axis passes through the moving range of the light source unit and extends to the optical member, receives the light emitted from the optical member, and measures the temperature of the optical member from the received light amount. A temperature sensor;
A second radiation temperature sensor whose measuring optical axis extends to the optical member outside the movement range of the light source unit, receives light emitted from the optical member, and measures the temperature of the optical member from the amount of light received When,
A lighting device comprising: The temperature sensor, the receiving the emitted infrared light from the optical member, according to claim 1 to claim, characterized in that an infrared radiation temperature sensor that measures the temperature of the optical member from the received light amount 6 The lighting device according to any one of the above.

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