WO2022181094A1 - 光学装置、光学装置の作動方法、及びプログラム - Google Patents

光学装置、光学装置の作動方法、及びプログラム Download PDF

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Publication number
WO2022181094A1
WO2022181094A1 PCT/JP2022/000782 JP2022000782W WO2022181094A1 WO 2022181094 A1 WO2022181094 A1 WO 2022181094A1 JP 2022000782 W JP2022000782 W JP 2022000782W WO 2022181094 A1 WO2022181094 A1 WO 2022181094A1
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Prior art keywords
light
infrared light
wavelength band
filter
optical element
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PCT/JP2022/000782
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English (en)
French (fr)
Japanese (ja)
Inventor
敏浩 青井
臣一 下津
哲也 藤川
智大 島田
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Fujifilm Corp
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Fujifilm Corp
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Priority to JP2023502150A priority Critical patent/JPWO2022181094A1/ja
Publication of WO2022181094A1 publication Critical patent/WO2022181094A1/ja
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/48—Thermography; Techniques using wholly visual means
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
    • G01J5/00—Radiation pyrometry, e.g. infrared or optical thermometry
    • G01J5/60—Radiation pyrometry, e.g. infrared or optical thermometry using determination of colour temperature

Definitions

  • the technology of the present disclosure relates to an optical device, a method of operating the optical device, and a program.
  • Japanese Patent Application Laid-Open No. 2003-166880 discloses an objective system for forming an image of a subject, a branching optical system for branching a light beam from the objective system into four or more optical paths, and a splitting optical system that provides spectral characteristics of each other.
  • An imaging means for obtaining image information of different spectral images, a color image processing circuit for obtaining color images from three spectral images out of the spectral images obtained by the respective imaging means, and a temperature distribution on the subject from the two spectral images.
  • An imaging device is disclosed having a temperature measurement means having a temperature image processing circuit.
  • the pamphlet of International Publication No. 2016/136844 includes a spectroscopic unit and a temperature calculating unit. It is configured to acquire the intensity and the light intensity in the second wavelength band, the first wavelength band and the second wavelength band are both bands in the near infrared region, and the first wavelength The central wavelength of the band and the central wavelength of the second wavelength band are different values, and the temperature calculator calculates the ratio of the light intensity in the first wavelength band to the light intensity in the second wavelength band. is used to calculate the temperature of water vapor.
  • Japanese Patent Application Laid-Open No. 2019-184280 discloses an infrared detector array having a plurality of photoelectric conversion elements that photoelectrically convert infrared rays emitted from an object with different detection sensitivities depending on the applied voltage, and different applied voltages to the photoelectric conversion elements.
  • data output means for outputting data based on the radiation intensity detected in the applied state;
  • the photoelectric conversion element has at least two states, a first state and a second state, in which infrared absorption spectra differ depending on the applied voltage.
  • An infrared detection system is disclosed that outputs an intensity distribution based on data detected in each of the first state and the second state.
  • Japanese Patent Application Laid-Open No. 2005-3437 discloses that in a two-color radiation thermometer using an InGaAs element as an infrared detection element, a first measurement wavelength different from each other is 1.1 to 1.3 ⁇ m, and a second measurement wavelength is disclosed to be 1.45 to 1.7 ⁇ m.
  • Japanese Patent Application Laid-Open No. 2020-85697 discloses a first detector that detects a first spectral irradiance of a first infrared ray having a first wavelength, and a second wavelength that is longer than the first wavelength.
  • a second detector for detecting a second spectral irradiance of the second infrared radiation; a first spectral irradiance ratio that is a ratio of the first spectral irradiance to the second spectral irradiance; Calculate the characteristic value of the spectral radiance at the first and second wavelengths based on an approximate value of the ratio of the blackbody spectral radiance at the wavelength and the blackbody spectral radiance at the second wavelength, and calculate
  • An infrared detection device is disclosed that includes a calculation unit that calculates the temperature of an object based on the characteristic value of spectral radiance.
  • One embodiment according to the technology of the present disclosure can contribute to improving measurement accuracy when measuring the temperature of an object compared to when the radiance ratio of the first light and the second light is not corrected.
  • An optical device, a method of operating an optical device, and a program are provided.
  • a first aspect of the technology of the present disclosure includes a first optical element, a second optical element, and a sensor, wherein the first optical element emits light incident on the first optical element in a first wavelength band.
  • the second optical element selectively transmits the first light and the second light in the second wavelength band, and the second optical element reduces the amount of at least a second light of the first light and the second light, thereby reducing the amount of the first light.
  • the sensor receives the first light and the second light whose radiance ratio is corrected by the second optical element, and generates a first signal according to the irradiance of the first light , and a second signal corresponding to the irradiance of the second light.
  • a second aspect of the technology of the present disclosure is the optical device according to the first aspect, further comprising a first processor, the first processor, based on the value of the first signal and the value of the second signal, An optical device for deriving the temperature of an object identified from .
  • a third aspect of the technology of the present disclosure is the optical device according to the first aspect or the second aspect, further comprising an actuator and a second processor, wherein the actuator adjusts the amount of light attenuation by the second optical element,
  • the second processor controls the actuator to adjust the amount of light reduction based on the radiance ratio before correction by the second optical element and the radiance ratio predetermined for the first light and the second light. It is a device.
  • a fourth aspect of the technology of the present disclosure is the optical device according to any one of the first to third aspects, wherein the first optical element has a turret filter, and the turret filter comprises the first An optical device that has a first filter that transmits light and a second filter that transmits second light, and rotates between a position where the first filter is inserted into the optical path of light and a position where the second filter is inserted into the optical path be.
  • a fifth aspect of the technology of the present disclosure is the optical device according to any one of the first to fourth aspects, wherein the first optical element reflects the first light and transmits the second light.
  • a prism having a reflective surface is provided, the sensor has a first sensor and a second sensor, the first sensor outputs a first signal in response to the irradiance of the first light, and the second sensor outputs a second It is an optical device that outputs a second signal according to the irradiance of two lights.
  • a sixth aspect of the technology of the present disclosure is the optical device according to any one of the first to fifth aspects, wherein the sensor includes a first image sensor, and the first optical element includes a A first polarizing filter and a second polarizing filter, the first polarizing filter transmitting a first light component of the light that oscillates in a first direction, and the second polarizing filter transmitting the light in a second direction.
  • the first image sensor has a plurality of physical pixels including a first physical pixel and a second physical pixel, and the first physical pixel has a first physical pixel that transmits the oscillating second light component. It is an optical device in which three polarizing filters are assigned, and a second physical pixel is assigned a fourth polarizing filter that transmits a second light component.
  • a seventh aspect of the technology of the present disclosure is the optical device according to any one of the first to sixth aspects, wherein the second optical element transmits the second light and An optical device having a neutral density filter that reduces the amount of
  • An eighth aspect of the technology of the present disclosure is the optical device according to the seventh aspect, wherein the thickness of the neutral density filter is set to a thickness that forms an image of the second light on the light receiving surface of the sensor. be.
  • a ninth aspect of the technology of the present disclosure is the optical device according to any one of the first to eighth aspects, wherein the second optical element includes a shielding member that shields part of the second light. It is an optical device with
  • a tenth aspect of the technology of the present disclosure is the optical device according to any one of the first to ninth aspects, wherein the second optical element is a diaphragm having a variable aperture through which light passes. is an optical device having
  • An eleventh aspect of the technology of the present disclosure is the optical device according to any one of the first to tenth aspects, further comprising a third processor and an optical element for blur correction, wherein the third processor comprises , an optical device that performs control to move an optical element in a direction in which blurring of an image obtained by forming an image of light on a light receiving surface of a sensor is corrected.
  • a twelfth aspect of the technology of the present disclosure is the optical device according to any one of the first to eleventh aspects, wherein the first light and the second light are both near-infrared light It is a device.
  • a thirteenth aspect of the technology of the present disclosure is the optical device according to any one of the first to twelfth aspects, wherein the first wavelength band and the second wavelength band are a wavelength band from 950 nm to 1100 nm; Optical devices each of two wavelength bands selected from a wavelength band of 1150 nm to 1350 nm, a wavelength band of 1500 nm to 1750 nm, and a wavelength band of 200 nm to 2400 nm.
  • a fourteenth aspect of the technology of the present disclosure is the optical device according to any one of the first to twelfth aspects, wherein the first wavelength band and the second wavelength band are a wavelength band from 950 nm to 1100 nm; An optical device in each of two adjacent wavelength bands of a wavelength band from 1150 nm to 1350 nm, a wavelength band from 1500 nm to 1750 nm, and a wavelength band from 200 nm to 2400 nm.
  • a fifteenth aspect of the technology of the present disclosure is the optical device according to any one of the first to twelfth aspects, wherein the first wavelength band and the second wavelength band are a wavelength band from 950 nm to 1100 nm; An optical device, each of two wavelength bands selected from a wavelength band of 1150 nm to 1350 nm, a wavelength band of 1500 nm to 1750 nm, and a wavelength band of 200 nm to 2400 nm based on the temperature of the object identified from the light.
  • a sixteenth aspect of the technology of the present disclosure is the optical device according to any one of the first to fifteenth aspects, wherein a zoom lens into which light is incident and a zoom lens along an optical axis of the zoom lens and a zoom mechanism for moving the optical device.
  • a seventeenth aspect of the technology of the present disclosure is the optical device according to any one of the first to sixteenth aspects, wherein the sensor has a second image sensor, and the optical device is an imaging device.
  • An optical device is the optical device according to any one of the first to sixteenth aspects, wherein the sensor has a second image sensor, and the optical device is an imaging device.
  • An optical device is the optical device according to any one of the first to sixteenth aspects, wherein the sensor has a second image sensor, and the optical device is an imaging device.
  • An eighteenth aspect of the technology of the present disclosure is a method of operating an optical device comprising a first optical element, a second optical element, and a sensor, wherein light incident on the first optical element is in a first wavelength band and a second light in a second wavelength band through a first optical element, reducing the amount of at least a second light out of the first light and the second light by the second optical element correcting the radiance ratio of the first light and the second light by causing the sensor to receive the first light and the second light, the radiance ratio of which has been corrected by the second optical element; outputting from the sensor a first signal responsive to the irradiance of the light and a second signal responsive to the irradiance of the second light.
  • a nineteenth aspect of the technology of the present disclosure includes a first optical element, a second optical element, and a sensor, wherein the first optical element emits light in a first wavelength band out of light incident on the first optical element.
  • the second optical element selectively transmits the first light and the second light in the second wavelength band, and the second optical element reduces the amount of at least a second light of the first light and the second light, thereby reducing the amount of the first light.
  • the senor receives the first light and the second light whose radiance ratio is corrected by the second optical element, and generates a first signal according to the irradiance of the first light , and a computer applied to an optical device that outputs a second signal according to the irradiance of the second light, based on the value of the first signal and the value of the second signal, the object identified from the light
  • FIG. 1 is a perspective view showing an example of a camera according to a first embodiment
  • FIG. 2 is a block diagram showing an example of the internal configuration of the camera according to the first embodiment
  • FIG. 2 is a block diagram showing an example of the electrical configuration of the camera according to the first embodiment
  • FIG. FIG. 4 is an explanatory diagram showing an example of the configuration and operation of the turret filter according to the first embodiment
  • FIG. 4 is a first explanatory diagram showing an example of the configuration and operation of the dimming member according to the first embodiment
  • FIG. 5 is a second explanatory diagram showing an example of the configuration and operation of the dimming member according to the first embodiment; It is the 3rd explanatory drawing which shows an example of a structure of the dimming member which concerns on 1st Embodiment, and an operation
  • 3 is a block diagram showing an example of a functional configuration of a CPU according to the first embodiment;
  • FIG. 4 is a block diagram showing an example of the operation of the CPU in the imaging mode according to the first embodiment;
  • FIG. FIG. 4 is an explanatory diagram showing an example of a function of a CPU as a wavelength selector according to the first embodiment;
  • 4 is a block diagram showing an example of the operation of the CPU in the temperature measurement mode according to the first embodiment;
  • FIG. 4 is a graph showing an example of the spectral distribution of a black body and the spectral distribution of a subject;
  • FIG. 4 is an explanatory diagram showing an example of the function of the CPU as a temperature derivation unit according to the first embodiment;
  • 4 is a flow chart showing an example of the flow of operations in an imaging mode of the CPU according to the first embodiment;
  • 6 is a flow chart showing an example of the flow of operations in a temperature measurement mode of the CPU according to the first embodiment;
  • compare the value of the second signal and the value of the third signal when the second radiance ratio of the second near-infrared light and the third near-infrared light is not corrected to the second predetermined radiance ratio and when it is corrected. It is a figure to do.
  • FIG. 4 is an explanatory diagram showing an example of the function of the CPU as a temperature derivation unit according to the first embodiment;
  • 4 is a flow chart showing an example of the flow of operations in an imaging mode of the CPU according to
  • FIG. 11 is a block diagram showing an example of the operation in imaging mode of a CPU according to the second embodiment;
  • FIG. 11 is a block diagram showing an example of the operation of the CPU in the temperature measurement mode according to the second embodiment;
  • 9 is a flow chart showing an example of the flow of operations in an imaging mode of a CPU according to the second embodiment;
  • 9 is a flow chart showing an example of the flow of operations in a temperature measurement mode of the CPU according to the second embodiment;
  • FIG. 11 is a block diagram showing an example of the operation in imaging mode of a CPU according to the third embodiment;
  • FIG. 14 is a third explanatory diagram showing an example of the configuration and operation of the dimming member according to the fourth embodiment;
  • FIG. 14 is a flow chart showing an example of the flow of operations in a temperature measurement mode of the CPU according to the fourth embodiment;
  • FIG. 16 is a flow chart showing an example of the flow of operations in a temperature measurement mode of a CPU according to the fifth embodiment;
  • FIG. 16 is a flow chart showing an example of the flow of operations in a temperature measurement mode of a CPU according to the fifth embodiment;
  • FIG. FIG. 11 is a block diagram showing an example of an electrical configuration of an imaging device according to a first modified example;
  • FIG. 11 is a block diagram showing an example of an electrical configuration of an imaging device according to a second modified example;
  • CPU is an abbreviation for "Central Processing Unit”.
  • GPU is an abbreviation for "Graphics Processing Unit”.
  • NVM is an abbreviation for "Non-Volatile Memory”.
  • RAM is an abbreviation for "Random Access Memory”.
  • IC is an abbreviation for "Integrated Circuit”.
  • ASIC is an abbreviation for "Application Specific Integrated Circuit”.
  • PLD is an abbreviation for "Programmable Logic Device”.
  • FPGA is an abbreviation for "Field-Programmable Gate Array”.
  • SoC is an abbreviation for "System-on-a-chip.”
  • SSD is an abbreviation for "Solid State Drive”.
  • HDD is an abbreviation for "Hard Disk Drive”.
  • EEPROM is an abbreviation for "Electrically Erasable and Programmable Read Only Memory”.
  • SRAM is an abbreviation for "Static Random Access Memory”.
  • I/F is an abbreviation for "Interface”.
  • USB is an abbreviation for "Universal Serial Bus”.
  • CMOS is an abbreviation for "Complementary Metal Oxide Semiconductor”.
  • CCD is an abbreviation for "Charge Coupled Device”.
  • LAN is an abbreviation for "Local Area Network”.
  • WAN is an abbreviation for "Wide Area Network”.
  • BPF is an abbreviation for "Band Pass Filter”.
  • Ir is an abbreviation for "Infrared Rays”.
  • ND is an abbreviation for "Neutral Density”.
  • LED is an abbreviation for "light emitting diode”.
  • EL is an abbreviation for "Electro Luminescence”.
  • perpendicular means an error that is generally allowed in the technical field to which the technology of the present disclosure belongs, in addition to perfect verticality, and does not go against the spirit of the technology of the present disclosure. It refers to the vertical in the sense of including the error of
  • horizontal means an error that is generally allowed in the technical field to which the technology of the present disclosure belongs, in addition to being completely horizontal, and is not contrary to the spirit of the technology of the present disclosure.
  • parallel means, in addition to complete parallelism, an error that is generally allowed in the technical field to which the technology of the present disclosure belongs, and does not go against the spirit of the technology of the present disclosure. It refers to parallel in the sense of including the error of In the description of this specification, “orthogonal” is an error that is generally allowed in the technical field to which the technology of the present disclosure belongs, in addition to perfect orthogonality, and is not contrary to the spirit of the technology of the present disclosure.
  • match means, in addition to perfect match, an error that is generally allowed in the technical field to which the technology of the present disclosure belongs, and does not go against the spirit of the technology of the present disclosure. It refers to a match in terms of meaning including errors in
  • the term “equidistant interval” means an error that is generally allowed in the technical field to which the technology of the present disclosure belongs, in addition to perfectly equal intervals, and is contrary to the spirit of the technology of the present disclosure. It refers to equal intervals in the sense of including errors to the extent that they do not occur.
  • camera 1 includes camera body 10 and lens unit 20 .
  • the camera 1 is an example of an “optical device” and an “imaging device” according to the technology of the present disclosure.
  • the camera 1 has a function of obtaining a visible light image by capturing visible light, a function of obtaining a near-infrared light image by capturing near-infrared light, and a function of capturing a subject based on electromagnetic waves emitted by thermal radiation from the subject. and a function of measuring the temperature of
  • a camera-side mount 12 for attaching the lens unit 20 is provided on the front surface 11 of the camera body 10 .
  • An illumination window 13 is provided on the front surface 11 of the camera body 10 for illuminating the subject with the illumination light IL.
  • the camera body 10 includes a light source 14 that generates illumination light IL.
  • the light source 14 is, for example, an LED that emits near-infrared light with a peak wavelength of 1550 nm as illumination light IL.
  • Light source 14 may be a halogen light. Illumination light IL generated by the light source 14 is transmitted through the irradiation window 13 and emitted forward of the camera body 10 .
  • the camera body 10 also includes an image sensor 15 .
  • the image sensor 15 is an example of a "sensor” and a "second image sensor” according to the technology of the present disclosure.
  • the image sensor 15 captures an image of the light L incident from the subject through the lens unit 20 .
  • the image sensor 15 has a light receiving surface 15A.
  • the light L incident on the lens unit 20 is imaged on the light receiving surface 15A by the lens unit 20.
  • An image is obtained by forming an image of the light L on the light receiving surface 15A.
  • a plurality of photodiodes are arranged in a matrix on the light receiving surface 15A.
  • the plurality of photodiodes includes a plurality of silicon photodiodes sensitive to visible light and a plurality of indium-gallium-arsenide photodiodes sensitive to near-infrared light.
  • the silicon photodiode will be referred to as a Si diode
  • the indium-gallium-arsenide photodiode will be referred to as an InGaAs diode.
  • a plurality of Si diodes generate and output analog image data according to the received visible light.
  • a plurality of InGaAs diodes generate and output analog image data corresponding to the received near-infrared light.
  • CMOS image sensor is exemplified as the image sensor 15, but the technology of the present disclosure is not limited to this. The technology of the present disclosure is also established.
  • the lens unit 20 includes a lens barrel 21 and a lens side mount 22.
  • the lens side mount 22 is provided at the rear end of the lens barrel 21 .
  • the lens side mount 22 is configured to be connectable to the camera side mount 12 of the camera body 10 .
  • the lens unit 20 is detachably attached to the camera body 10 by a lens side mount 22 . Note that the lens unit 20 may be fixed to the camera body 10 in a non-detachable manner.
  • the lens unit 20 includes an objective lens 30, a focus lens 31, a zoom lens 32, an aperture 33, a blur correction lens 34, a turret filter 35, a light reducing member 36, and an adjustment lens 37.
  • An objective lens 30, a focus lens 31, a zoom lens 32, an aperture 33, a blur correction lens 34, a turret filter 35, a light reducing member 36, and an adjustment lens in order from the object side to the image side along the optical axis OA of the lens unit 20. 37 are placed.
  • the objective lens 30 is fixed to the tip of the lens barrel 21 and is a lens that collects light.
  • the focus lens 31 is a lens for adjusting the focus position of the image.
  • the zoom lens 32 is a lens for adjusting zoom magnification.
  • the diaphragm 33 is an optical element for adjusting the amount of light.
  • the diaphragm 33 has an aperture 33A.
  • Light guided by zoom lens 32 passes through aperture 33A.
  • the diaphragm 33 is a movable diaphragm in which the diameter of the aperture 33A is variable.
  • the amount of light directed by zoom lens 32 is modified by aperture 33 .
  • the blur correction lens 34 is a lens for correcting image blur.
  • the blur correction lens 34 is an example of a “blur correction lens” according to the technology of the present disclosure.
  • the turret filter 35 has a plurality of optical filters.
  • the turret filter 35 selects the optical filter inserted in the optical path of the light in the lens unit 20 among the plurality of optical filters, thereby filtering out light in a plurality of wavelength bands (eg, visible light, It is an optical element that selectively transmits (near-infrared light in different wavelength bands within the near-infrared wavelength band).
  • the optical path of light within the lens unit 20 is positioned, for example, on the optical axis OA.
  • the optical path of light within the lens unit 20 is simply referred to as an optical path.
  • the configuration of the turret filter 35 will be detailed later with reference to FIG.
  • the dimming member 36 has a plurality of dimming filters.
  • the dimming member 36 is an optical element that adjusts the amount of dimming by switching which of the multiple dimming filters is inserted into the optical path.
  • the configuration of the dimming member 36 will be described in detail later with reference to FIGS. 5 to 7.
  • FIG. 5 to 7 The configuration of the dimming member 36 will be described in detail later with reference to FIGS. 5 to 7.
  • the adjustment lens 37 is used to adjust the difference in focal length when switching between the plurality of optical filters provided in the turret filter 35 and the difference in focal length when switching between the plurality of dimming filters provided in the dimming member 36. is the lens.
  • the order of arrangement of the focus lens 31, zoom lens 32, diaphragm 33, blur correction lens 34, turret filter 35, light reducing member 36, and adjustment lens 37 may be other than the above.
  • Each of the objective lens 30, the focus lens 31, the zoom lens 32, the blur correction lens 34, and the adjusting lens 37 may be a single lens, or may be a lens group having a plurality of lenses.
  • the lens unit 20 may include other lenses.
  • the lens unit 20 may include an optical element such as a half mirror or a polarizing element.
  • the lens unit 20 includes a zoom drive mechanism 42, an aperture drive mechanism 43, a blur correction drive mechanism 44, a turret drive mechanism 45, a dimming drive mechanism 46, and an adjustment drive mechanism 47.
  • the zoom drive mechanism 42 , aperture drive mechanism 43 , blur correction drive mechanism 44 , turret drive mechanism 45 , dimming drive mechanism 46 , and adjustment drive mechanism 47 are electrically connected to an electrical contact 38 provided at the rear end of the lens barrel 21 . properly connected.
  • the camera body 10 includes a control circuit 50.
  • the control circuit 50 is electrically connected to electrical contacts 58 provided on the camera-side mount 12 .
  • the electrical contact 38 is connected to the electrical contact 58, and the control circuit 50 operates the zoom drive mechanism 42 and the aperture drive mechanism. 43 , a blur correction drive mechanism 44 , a turret drive mechanism 45 , a dimming drive mechanism 46 and an adjustment drive mechanism 47 are electrically connected.
  • the zoom drive mechanism 42, the aperture drive mechanism 43, the blur correction drive mechanism 44, the turret drive mechanism 45, the dimming drive mechanism 46, and the adjustment drive mechanism 47 are all drive mechanisms including actuators such as motors.
  • the control circuit 50 includes a computer 60, a zoom drive circuit 52, an aperture drive circuit 53, a blur correction drive circuit 54, a turret drive circuit 55, a dimming drive circuit 56, and an adjustment drive circuit 57.
  • the zoom drive circuit 52 , aperture drive circuit 53 , blur correction drive circuit 54 , turret drive circuit 55 , dimming drive circuit 56 and adjustment drive circuit 57 are connected to computer 60 via input/output I/F 59 .
  • the computer 60 includes a CPU 61, NVM 62, and RAM 63.
  • the CPU 61 , NVM 62 and RAM 63 are interconnected via a bus 64 , and the bus 64 is connected to the input/output I/F 59 .
  • the NVM 62 is a non-temporary storage medium and stores various parameters and various programs.
  • NVM 62 is an EEPROM.
  • the RAM 63 temporarily stores various information and is used as a work memory.
  • the CPU 61 reads necessary programs from the NVM 62 and executes the read programs in the RAM 63 .
  • the CPU 61 controls the entire camera 1 according to programs executed on the RAM 63 .
  • the zoom drive circuit 52 adjusts the positions of the focus lens 31 and the zoom lens 32 by driving the zoom drive mechanism 42 according to instructions from the computer 60 .
  • the focus lens 31 and the zoom lens 32 move along the optical axis of the lens unit 20 by applying power from the zoom driving mechanism 42 .
  • the aperture drive circuit 53 changes the diameter of the aperture 33A (see FIG. 2) provided in the aperture 33 by driving the aperture drive mechanism 43 according to instructions from the computer 60.
  • the blur correction drive circuit 54 adjusts the position of the blur correction lens 34 by driving the blur correction drive mechanism 44 according to instructions from the computer 60 and a feedback signal output from a feedback circuit 75, which will be described later.
  • the blur correction lens 34 moves along a plane perpendicular to the optical axis of the lens unit 20 by applying power from the blur correction driving mechanism 44 . Specifically, the blur correction lens 34 moves in a direction in which blurring of an image obtained by forming an image of light on the image sensor 15 is corrected.
  • the turret drive circuit 55 adjusts the position of the turret filter 35 in the rotational direction by driving the turret drive mechanism 45 according to instructions from the computer 60 .
  • the turret filter 35 rotates along a plane perpendicular to the optical axis of the lens unit 20 by applying power from the turret driving mechanism 45 .
  • the rotation operation of the turret filter 35 will be detailed later with reference to FIG.
  • the dimming drive circuit 56 adjusts the position of the dimming member 36 by driving the dimming drive mechanism 46 according to instructions from the computer 60 .
  • the dimming member 36 slides along the direction perpendicular to the optical axis of the lens unit 20 by applying power from the dimming driving mechanism 46 .
  • the sliding operation of the dimming member 36 will be described later in detail with reference to FIGS. 5 to 7.
  • the adjustment drive circuit 57 adjusts the position of the adjustment lens 37 by driving the adjustment drive mechanism 47 according to instructions from the computer 60 .
  • the adjustment lens 37 is moved along the optical axis OA of the lens unit 20 by applying power from the adjustment drive mechanism 47 .
  • the camera body 10 includes an image sensor driver 71, a signal processing circuit 72, a light source control circuit 73, a vibration sensor 74, a feedback circuit 75, a display 76, a display control circuit 77, an input device 78, an input A circuit 79 and an external I/F 80 are provided.
  • Image sensor driver 71, signal processing circuit 72, light source control circuit 73, feedback circuit 75, display control circuit 77, input circuit 79, and external I/F 80 are connected to computer 60 via input/output I/F 59. .
  • the image sensor driver 71 causes the image sensor 15 to capture light according to instructions from the computer 60 .
  • the signal processing circuit 72 performs various signal processing on the analog image data output from the image sensor 15 to generate and output digital image data.
  • the light source control circuit 73 switches the light source 14 on and off according to instructions from the computer 60 .
  • the light source 14 outputs illumination light when switched on, and stops outputting illumination light when switched off.
  • the vibration sensor 74 is, for example, a gyro sensor, and detects vibration of the camera 1.
  • a gyro sensor included in the vibration sensor 74 detects vibrations of the camera 1 around the pitch axis and the yaw axis.
  • the vibration sensor 74 converts vibrations about the pitch axis and the vibrations about the yaw axis detected by the gyro sensor into vibrations in a two-dimensional plane parallel to the pitch axis and the yaw axis. to detect vibration acting in the direction of the pitch axis and vibration acting in the direction of the yaw axis.
  • the vibration sensor 74 outputs a vibration detection signal corresponding to the detected vibration.
  • the vibration detection sensor may be an acceleration sensor.
  • a motion vector obtained by comparing successive captured images stored in the NVM 62 and/or the RAM 63 may be used as the vibration.
  • the final used vibration may be derived based on the vibration detected by the physical sensor and the motion vector obtained by image processing.
  • the feedback circuit 75 generates a feedback signal by performing various signal processing on the vibration detection signal output from the vibration sensor 74 .
  • the feedback circuit 75 is connected to the blur correction drive circuit 54 via the input/output I/F 59 and outputs a feedback signal to the blur correction drive circuit 54 according to instructions from the computer 60 .
  • the display 76 is, for example, a liquid crystal display or an EL display, and displays images and/or character information.
  • the display control circuit 77 causes the display 76 to display an image according to instructions from the computer 60 .
  • the input device 78 is, for example, a device such as a touch panel and/or a switch, and receives instructions given by the user.
  • the input circuit 79 outputs an input signal according to an instruction given to the input device 78 by the user.
  • the external I/F 80 is an interface communicably connected to an external device.
  • the turret filter 35 has a disc 81 .
  • the disc 81 is provided with an Ir cut filter 82, a first BPF 83A, a second BPF 83B, a third BPF 83C, and a fourth BPF 83D as a plurality of optical filters at equal intervals along the circumferential direction of the disc 81.
  • the Ir cut filter 82, the first BPF 83A, the second BPF 83B, the third BPF 83C, and the fourth BPF 83D are referred to as optical filters unless they need to be distinguished and described.
  • the first BPF 83A, the second BPF 83B, the third BPF 83C, and the fourth BPF 83D will be referred to as BPFs 83 unless they need to be distinguished and described.
  • the turret filter 35 selectively inserts and removes a plurality of optical filters with respect to the optical path in a turret system. Specifically, by rotating the turret filter 35 in the direction of the arc arrow R shown in FIG. (upper optical path). When the optical filter is inserted into the optical path, the optical axis OA passes through the center of the optical filter, and the center of the optical filter inserted into the optical path coincides with the center of the light receiving surface of the image sensor 15 .
  • the turret filter 35 selectively transmits light in different wavelength bands out of the light incident on the turret filter 35 by the Ir cut filter 82, the first BPF 83A, the second BPF 83B, the third BPF 83C, and the fourth BPF 83D.
  • the turret filter 35 is an example of the "first optical element" according to the technology of the present disclosure.
  • the Ir cut filter 82 is an optical filter that cuts infrared rays and transmits only light other than infrared rays.
  • the BPF 83 is an optical filter that transmits near-infrared light.
  • the first BPF 83A, the second BPF 83B, the third BPF 83C, and the fourth BPF 83D transmit near-infrared light in different wavelength bands.
  • the first BPF 83A is an optical filter that corresponds to a wavelength band near 1000 nm (nanometers). As an example, the first BPF 83A transmits only near-infrared light in the wavelength band from 950 nm to 1100 nm. The near-infrared light transmitted through the first BPF 83A is hereinafter referred to as first near-infrared light.
  • the second BPF 83B is an optical filter corresponding to a wavelength band near 1250 nm.
  • the second BPF 83B transmits only near-infrared light in the wavelength band from 1150 nm to 1350 nm.
  • the near-infrared light transmitted through the second BPF 83B is hereinafter referred to as second near-infrared light.
  • the third BPF 83C is an optical filter that corresponds to a wavelength band near 1550 nm.
  • the third BPF 83C transmits only near-infrared light in the wavelength band from 1500 nm to 1750 nm.
  • the near-infrared light transmitted through the third BPF 83C is hereinafter referred to as third near-infrared light.
  • the fourth BPF 83D is an optical filter corresponding to a wavelength band near 2150 nm.
  • the fourth BPF 83D transmits only near-infrared light in the wavelength band from 2000 nm to 2400 nm.
  • the near-infrared light transmitted through the fourth BPF 83D is hereinafter referred to as fourth near-infrared light.
  • the first near-infrared light, the second near-infrared light, the third near-infrared light, and the fourth near-infrared light are referred to as near-infrared light unless it is necessary to distinguish them.
  • each band mentioned here includes an error that is generally allowed in the technical field to which the technology of the present disclosure belongs and that does not deviate from the gist of the technology of the present disclosure.
  • each wavelength band mentioned here is merely an example, and different wavelength bands may be used.
  • the first BPF 83A is an example of a "first filter that transmits the first light” according to the technology of the present disclosure
  • the second BPF 83B is a "second filter that transmits the second light.”
  • the second BPF 83B and the third BPF 83C is an example of the “first filter that transmits the first light” according to the technology of the present disclosure
  • the third BPF 83C is the “second light” according to the technology of the present disclosure. It is an example of a "transmitting second filter”.
  • the third BPF 83C is an example of the "first filter that transmits the first light” according to the technology of the present disclosure
  • the fourth BPF 83D is the “second light” according to the technology of the present disclosure. It is an example of a "transmitting second filter”.
  • the Ir cut filter 82 When the Ir cut filter 82 is inserted into the optical path and the visible light transmitted through the Ir cut filter 82 is imaged on the light receiving surface of the image sensor 15, a plurality of Si diodes arranged on the light receiving surface cut the received visible light into an image. It generates and outputs corresponding analog image data. This realizes a function of obtaining a visible light image by imaging visible light. Further, when the BPF 83 is inserted into the optical path and the near-infrared light transmitted through the BPF 83 is imaged on the light-receiving surface of the image sensor 15, a plurality of InGaAs diodes arranged on the light-receiving surface emit light corresponding to the received near-infrared light. generated and output analog image data. This realizes a function of obtaining a near-infrared light image by capturing near-infrared light.
  • the camera 1 has a function of obtaining a visible light image by capturing visible light and a function of obtaining a near-infrared light image by capturing near-infrared light.
  • the camera 1 also has a function of measuring the temperature of a subject based on electromagnetic waves emitted by thermal radiation from the subject, as described below. Prepare.
  • the turret filter 35 is used as a means for generating light in two different wavelength bands.
  • near-infrared light in two adjacent wavelength bands is used for temperature measurement. be done.
  • the near-infrared light transmission characteristics of the plurality of BPFs 83 included in the turret filter 35 differ from each other according to the wavelength of the near-infrared light.
  • the sensitivity of the InGaAs diode included in the image sensor 15 also varies according to the wavelength of the near-infrared light.
  • the error in the value of the signal output from the InGaAs diode according to the second near-infrared light transmitted through the second BPF 83B is different from the error in the value of the signal output from the InGaAs diode in response to the third near-infrared light transmitted through the third BPF 83C. If the error between the values of the two signals differs according to the wavelength of the near-infrared light in this way, there is a possibility that the measurement accuracy will decrease even if the two-color temperature measurement method is used.
  • the amount of near-infrared light transmitted through one of the two BPFs 83 is controlled by the dimming member 36 in order to ensure the measurement accuracy by the two-color thermometry method and the real-time property of the temperature measurement. by reducing the difference in the error between the values of the two signals depending on the wavelength of the near-infrared light.
  • the configuration of the dimming member 36 will be described in detail below.
  • the dimming member 36 has a flat plate 91 .
  • the flat plate 91 is provided with a first light-attenuating filter 93A, a second light-attenuating filter 93B, and a third light-attenuating filter 93C as a plurality of light-attenuating filters at regular intervals along the longitudinal direction of the flat plate 91 .
  • the first light-attenuating filter 93A, the second light-attenuating filter 93B, and the third light-attenuating filter 93C are, for example, filters having light-attenuating properties such as ND filters or dummy filters.
  • the first dimmer filter 93A, the second dimmer filter 93B, and the third dimmer filter 93C are referred to as the dimmer filters 93 unless they need to be distinguished and described.
  • the dimming member 36 is an example of the "second optical element" according to the technology of the present disclosure.
  • the first neutral density filter 93A, the second neutral density filter 93B, and the third neutral density filter 93C are examples of the "light density filter" according to the technology of the present disclosure.
  • the dimming member 36 slides, for example, in the direction of the straight double-headed arrow S shown in FIGS.
  • the dimming member 36 has a position where it escapes from the optical path as shown on the left side of each drawing of FIGS.
  • the second neutral density filter 93B is inserted into the optical path
  • the third neutral density filter 93C is slid into the optical path.
  • the dimming member 36 is arranged at a position away from the optical path as shown on the left side of each of FIGS. .
  • the first neutral density filter 93A, the second neutral density filter 93B, and the third neutral density filter 93C reduce light with different light reduction amounts.
  • the first light-attenuating filter 93A, the second light-attenuating filter 93B, and the third light-attenuating filter 93C correspond to the second BPF 83B, the third BPF 83C, and the fourth BPF 83D, respectively.
  • the first neutral density filter 93A overlaps with the second BPF 83B, and the second near-infrared light transmitted through the second BPF 83B reduce the amount of
  • the second neutral density filter 93B overlaps with the third BPF 83C, and the third near-infrared light transmitted through the third BPF 83C Decrease the amount of outside light. Further, as shown on the right side of FIG.
  • the amount of light attenuation by the first light-attenuating filter 93A shown in FIG. 5 is, as shown on the left side of FIG.
  • the radiance ratio with the second near-infrared light that passes through the second BPF 83B and the first neutral density filter 93A and enters the image sensor 15 (hereinafter referred to as the first radiance ratio) is
  • the dimming amount is set equal to a predetermined radiance ratio (hereinafter referred to as a first predetermined radiance ratio) for the first near-infrared light and the second near-infrared light.
  • the amount of light attenuation by the second light-attenuating filter 93B shown in FIG. 6 is, as shown on the left side of FIG. , the radiance ratio with the third near-infrared light that passes through the third BPF 83C and the second neutral density filter 93B and enters the image sensor 15 (hereinafter referred to as the second radiance ratio) is the second The dimming amount is set equal to a predetermined radiance ratio (hereinafter referred to as a second predetermined radiance ratio) for the near-infrared light and the third near-infrared light.
  • a predetermined radiance ratio hereinafter referred to as a second predetermined radiance ratio
  • the amount of light attenuation by the third light-attenuating filter 93C shown in FIG. 7 is, as shown on the left side of FIG. , the radiance ratio with the third near-infrared light that passes through the fourth BPF 83D and the third neutral density filter 93C and enters the image sensor 15 (hereinafter referred to as the third radiance ratio) is the third The dimming amount is set equal to a predetermined radiance ratio (hereinafter referred to as a third predetermined radiance ratio) for the near-infrared light and the fourth near-infrared light.
  • a predetermined radiance ratio hereinafter referred to as a third predetermined radiance ratio
  • the first radiance ratio, the first predetermined radiance ratio, the second radiance ratio, the second predetermined radiance ratio, the third radiance ratio, and the third predetermined radiance ratio, and the first neutral density filter 93A , the amount of light attenuation by the second light-attenuating filter 93B, and the amount of light attenuation by the third light-attenuating filter 93C will be described.
  • the first radiance ratio As shown on the left side of FIG.
  • the first predetermined radiance ratio corresponds to the radiance ratio of the first near-infrared light and the second near-infrared light calculated from the known spectral distribution of the heat light source.
  • the amount of light attenuation by the first neutral density filter 93A is set to the amount of light attenuation that makes the first radiance ratio equal to the first predetermined radiance ratio.
  • the second radiance ratio as shown on the left side of FIG. 2 signal value and, as shown on the right side of FIG. 6, the third near-infrared light emitted from the thermal light source and transmitted through the third BPF 83C and the second attenuation filter 93B is received by the same InGaAs diode as above. corresponds to the ratio of the values of the third signal output from the InGaAs diode.
  • the second predetermined radiance ratio corresponds to the radiance ratio of the second near-infrared light and the third near-infrared light calculated from the known spectral distribution of the heat light source.
  • the amount of light attenuation by the second neutral density filter 93B is set to the amount of light attenuation that makes the second radiance ratio equal to the second predetermined radiance ratio.
  • the third radiance ratio as shown on the left side of FIG. 3 signal value and, as shown on the right side of FIG. 7, the fourth near-infrared light emitted from the thermal light source and transmitted through the fourth BPF 83D and the third neutral density filter 93C is received by the same InGaAs diode as above. corresponds to the ratio of the values of the fourth signal output from the InGaAs diode.
  • the third predetermined radiance ratio corresponds to the radiance ratio of the third near-infrared light and the fourth near-infrared light calculated from the known spectral distribution of the heat light source.
  • the amount of light attenuation by the third neutral density filter 93C is set to the amount of light attenuation that makes the third radiance ratio equal to the third predetermined radiance ratio.
  • the first radiance ratio, the second radiance ratio, and the third radiance ratio are examples of the "radiance ratio before correction by the second optical element" according to the technology of the present disclosure
  • the first predetermined radiance ratio , the second predetermined radiance ratio, and the third predetermined radiance ratio are examples of “predetermined radiance ratios for the first light and the second light” according to the technology of the present disclosure.
  • the thickness of the BPF 83 is set to a thickness that causes the light incident on the BPF 83 to form an image on the light receiving surface of the image sensor 15 . 5 to 7, the light incident on the BPF 83 forms an image on the light receiving surface of the image sensor 15 when the neutral density filter 93 is out of the optical path.
  • the thickness of the neutral density filter 93 is set to a thickness such that the light incident on the BPF 83 and the neutral density filter 93 forms an image on the light receiving surface of the image sensor 15 . 5 to 7, in a state in which the light-reducing filter 93 is inserted in the optical path, light incident on the BPF 83 and the light-reducing filter 93 is focused on the light-receiving surface of the image sensor 15. imaged.
  • the imaging support processing is realized by executing the imaging support processing program 100 by the CPU 61 .
  • the imaging support processing program 100 is an example of a “program” according to the technology of the present disclosure.
  • the imaging support processing program 100 is stored in the NVM 62 , and the CPU 61 reads the imaging support processing program 100 from the NVM 62 and executes it on the RAM 63 .
  • the CPU 61 performs imaging support processing according to the imaging support processing program 100 executed on the RAM 63 .
  • the CPU 61 executes the imaging support processing program 100 on the RAM 63 to switch between the imaging mode and the temperature measurement mode.
  • the CPU 61 functions as a light source ON control unit 111, a wavelength selection unit 112, a turret control unit 113, an imaging control unit 114, a display control unit 115, an end determination unit 116, and a light source OFF control unit 117. Further, in the temperature measurement mode, the CPU 61 controls the wavelength selection section 121, the first turret control section 122, the first imaging control section 123, the second turret control section 124, the dimming control section 125, the second imaging control section 126, the temperature It functions as a derivation unit 127 , a display control unit 128 and an end determination unit 129 .
  • the functional configuration of the CPU 61 in the imaging mode and the functional configuration of the CPU 61 in the temperature measurement mode will be described below.
  • the light source ON control section 111 outputs an ON command to the light source control circuit 73 .
  • the light source control circuit 73 switches the light source 14 ON.
  • Light source 14 outputs illumination light IL when switched on.
  • the wavelength selection unit 112 selects one wavelength band used for imaging according to the instruction received by the input device 78 .
  • the wavelength selection unit 112 selects the visible light wavelength band, the first near-infrared light wavelength band from 950 nm to 1100 nm, the second near-infrared light wavelength band from 1150 nm to 1350 nm, and the third near-infrared light wavelength band from 1500 nm to 1750 nm.
  • One wavelength band is selected from the infrared wavelength band and the fourth near-infrared wavelength band from 2000 nm to 2400 nm. Note that here, an example of a mode in which a wavelength band is selected according to an instruction received by the input device 78 is given, but the wavelength band is selected according to various conditions (for example, subject temperature and/or imaging conditions). may be selected.
  • the turret control unit 113 outputs to the turret drive circuit 55 a rotation command for inserting into the optical path an optical filter corresponding to the wavelength band selected by the wavelength selection unit 112 from among the plurality of optical filters.
  • the turret drive circuit 55 drives the turret drive mechanism 45 to rotate the turret filter 35 to a position where the optical filter corresponding to the rotation command is inserted into the optical path.
  • the imaging control unit 114 outputs an imaging command to the image sensor driver 71 .
  • the image sensor driver 71 causes the image sensor 15 to image the light L when receiving the imaging command.
  • the image sensor 15 captures the light L emitted from the subject and outputs analog image data obtained by capturing the light L.
  • the signal processing circuit 72 performs various signal processing on the analog image data output from the image sensor 15 to generate and output digital image data.
  • the display control unit 115 controls the display control circuit 77 to display the captured image on the display 76 based on the digital image data generated by the signal processing circuit 72 . Thereby, the captured image is displayed on the display 76 .
  • the captured image is displayed as a moving image, for example, but may be displayed as a still image.
  • the termination determination unit 116 determines whether or not to terminate the imaging mode. If the determination is negative, the termination determination unit 116 continues the imaging mode.
  • the light source off control unit 117 outputs an off command to the light source control circuit 73 when the end determination unit 116 makes an affirmative determination. Upon receiving the off command, the light source control circuit 73 switches off the light source 14 . Light source 14 stops outputting illumination light IL when switched off.
  • the wavelength selector 121 selects two wavelength bands used for dichroic thermometry, that is, a first wavelength band and a second wavelength band.
  • the wavelength selection unit 121 uses a first near-infrared light wavelength band from 950 nm to 1100 nm, a second near-infrared light wavelength band from 1150 nm to 1350 nm, and a wavelength band from 1500 nm to Two wavelength bands are selected from the third near-infrared wavelength band of 1750 nm and the fourth near-infrared wavelength band of 2000 nm to 2400 nm. Further, as an example, the wavelength selection unit 121 uses the wavelength band of the first near-infrared light, the wavelength band of the second near-infrared light, and the wavelength of the third near-infrared light as the first wavelength band and the second wavelength band. and two adjacent wavelength bands from among the wavelength bands of the fourth near-infrared light.
  • the wavelength selection unit 121 uses the wavelength band of the first near-infrared light, the wavelength band of the second near-infrared light, and the wavelength of the third near-infrared light as the first wavelength band and the second wavelength band. and the wavelength band of the fourth near-infrared light, two wavelength bands are selected based on the temperature of the subject. Further, as an example, the wavelength selection unit 121 uses the wavelength band of the first near-infrared light, the wavelength band of the second near-infrared light, and the wavelength of the third near-infrared light as the first wavelength band and the second wavelength band. A shorter wavelength band is selected from the band and the wavelength band of the fourth near-infrared light as the temperature of the object increases.
  • the temperature of the subject is predicted based on information about the temperature expected from the fire situation and/or information input to the camera 1 by the user.
  • the information on the temperature expected from the fire situation may be information on the standard fire temperature with respect to the elapsed time from the occurrence of the fire. Standard fire temperature is defined in ISO834.
  • the wavelength selection unit 121 may switch the wavelength band to be selected according to the temperature of the subject expected from the fire situation. Also, the wavelength band may be switched according to an instruction received by the input device 78 .
  • the wavelength selection unit 121 selects the wavelength band of the second infrared light as the first wavelength band and selects the wavelength band of the third infrared light as the second wavelength band will be taken as an example.
  • the first turret control unit 122, the first imaging control unit 123, the second turret control unit 124, the dimming control unit 125, the second imaging control unit 126, and the temperature derivation unit 127 will be described.
  • the second near-infrared light is an example of the "first light” according to the technology of the present disclosure
  • the third near-infrared light is an example of the "second light” according to the technology of the present disclosure. be.
  • the first turret control unit 122 outputs a rotation command to the turret drive circuit 55 to insert the second BPF 83B corresponding to the wavelength band of the second near-infrared light into the optical path.
  • the turret drive circuit 55 drives the turret drive mechanism 45 to rotate the turret filter 35 to the position where the second BPF 83B is inserted into the optical path.
  • the second BPF 83B is inserted into the optical path, the second near-infrared light transmitted through the second BPF 83B forms an image on the light receiving surface of the image sensor 15.
  • the first imaging control section 123 outputs an imaging command to the image sensor driver 71 .
  • the image sensor driver 71 makes the image sensor 15 image a 2nd near-infrared light, if an imaging command is received.
  • the image sensor 15 will output the 1st analog image data obtained by imaging the 2nd near-infrared light, if the 2nd near-infrared light is imaged.
  • the signal processing circuit 72 performs various signal processing on the first analog image data output from the image sensor 15 to generate and output first digital image data.
  • the first digital image data is stored in NVM 62 and/or RAM 63 .
  • the second turret control unit 124 outputs to the turret drive circuit 55 a rotation command for inserting the third BPF 83C corresponding to the wavelength band of the third near-infrared light into the optical path.
  • the turret drive circuit 55 drives the turret drive mechanism 45 to rotate the turret filter 35 to the position where the third BPF 83C is inserted into the optical path.
  • the dimming control unit 125 outputs a slide command to the dimming driving circuit 56 to insert the second dimming filter 93B corresponding to the third BPF 83C into the optical path.
  • the dimming drive circuit 56 drives the dimming drive mechanism 46 to slide the dimming member 36 to the position where the second dimming filter 93B is inserted into the optical path.
  • the second light-attenuating filter 93B overlaps with the third BPF 83C, and the third near-infrared light transmitted through the third BPF 83C is attenuated by the second light-attenuating filter 93B.
  • the second imaging control unit 126 outputs imaging commands to the image sensor driver 71 .
  • the image sensor driver 71 makes the image sensor 15 image the 3rd near-infrared light, if an imaging command is received. After capturing the third near-infrared light, the image sensor 15 outputs second analog image data obtained by capturing the third near-infrared light.
  • the signal processing circuit 72 performs various signal processing on the second analog image data output from the image sensor 15 to generate and output second digital image data.
  • the second digital image data is stored in NVM 62 and/or RAM 63 .
  • the temperature derivation unit 127 calculates the temperature distribution of the subject by two-color thermometry based on the first digital image data and the second digital image data.
  • Equation (1) shows the relational expression of the temperature T of the subject by the two-color thermometry method.
  • I1 is the value of the second signal output from the InGaAs diode according to the irradiance of the second near-infrared light transmitted through the second BPF 83B and received by the InGaAs diode.
  • I2 is the value of the third signal output from the InGaAs diode according to the irradiance of the third near-infrared light transmitted through the third BPF 83C and the second neutral density filter 93B and received by the InGaAs diode.
  • R1 is the radiance of the second near-infrared light transmitted through the second BPF 83B and incident on the InGaAs diode.
  • R2 is the radiance of the third near-infrared light that passes through the third BPF 83C and the second neutral density filter 93B and enters the InGaAs diode.
  • t1 is the light transmittance of the area between the object and the image sensor 15 when the image sensor 15 captures the second near-infrared light.
  • t2 is the light transmittance of the area between the subject and the image sensor 15 when the image sensor 15 captures the image of the third near-infrared light.
  • Rbb1 is the radiance of the electromagnetic wave having the same wavelength as the second near-infrared light emitted from the heat-generating black body.
  • Rbb2 is the radiance of the electromagnetic wave having the same wavelength as the third near-infrared light emitted from the heat-generating black body.
  • e1 is the subject's emissivity in the same wavelength band as the second near-infrared light.
  • e2 is the subject's emissivity in the same wavelength band as the third near-infrared light.
  • the emissivities e1 and e2 are values determined according to the type and state of the subject.
  • the transmittances t1 and t2 are the transmittances of the area including the space from the subject to the lens unit 20 and the lens group of the lens unit 20, and an object such as smoke exists in the space from the subject to the lens unit 20. If so, the transmittance of the object is also included in the above transmittance.
  • FIG. 12 is a graph showing an example of the spectral distribution of a black body and the spectral distribution of a subject.
  • the wavelength W1 is 1250 nm corresponding to the second near-infrared light
  • the wavelength W2 is 1550 nm corresponding to the third near-infrared light.
  • the graph shown in FIG. 12 is a graph when the temperature of the object and the black body are 1000° C. respectively.
  • a black body is an imaginary object that can completely absorb and thermally radiate electromagnetic waves incident from the outside over all wavelengths. It is a general object.
  • the temperature deriving unit 127 uses the first digital image data and the second digital image data read from the NVM 62 and/or the RAM 63 in order to calculate the temperature distribution of the subject by the two-color thermometry method.
  • a first pixel value included in the first digital image data and a second pixel value included in the second digital image data are extracted for each InGaAs diode.
  • the first pixel value is proportional to the value I1 of the second signal described above
  • the value I1 of the second signal is proportional to the radiance R1 of the second near-infrared light described above.
  • the second pixel value is proportional to the value I2 of the third signal described above, and the value I2 of the third signal is proportional to the radiance R2 of the third near-infrared light described above.
  • the second signal is an example of the "first signal” according to the technology of the present disclosure
  • the third signal is an example of the "second signal” according to the technology of the present disclosure.
  • the amount of light attenuation by the second neutral density filter 93B is set as the amount of light attenuation equal to the second predetermined radiance ratio of infrared light. Therefore, in the above equation (1), the transmittance t1 can be considered equal to the transmittance t2.
  • the emissivity e1 can be equated with the emissivity e2. Therefore, the following formula (2) is derived from the above formula (1).
  • the temperature derivation unit 127 derives the subject's temperature T that satisfies the above formula (2).
  • the temperature T of the subject may be derived by being calculated based on a calculation formula, or may be derived by being extracted from a predetermined table.
  • the CPU 61 functioning as the temperature derivation unit 127 is an example of the "first processor" according to the technology of the present disclosure.
  • a subject is an example of an “object identified from light” according to the technology of the present disclosure.
  • the display control unit 128 generates temperature-related temperature information based on the temperature distribution of the subject calculated by the temperature deriving unit 127 . Then, the display control unit 128 controls the display control circuit 77 to display on the display 76 a superimposed image obtained by superimposing the temperature information on the captured image obtained in the same manner as in the above-described imaging mode. As a result, a superimposed image in which the temperature information is superimposed on the captured image is displayed on the display 76 .
  • Examples of temperature information include information indicating an area where the temperature is equal to or higher than a predetermined threshold value, a specific temperature value, and a plurality of sections divided for each predetermined temperature range. and information indicating the temperature distribution with a color tone corresponding to the temperature.
  • the termination determination unit 129 determines whether to terminate the temperature measurement mode. The termination determination unit 129 continues the temperature measurement mode when the determination is negative, and terminates the temperature measurement mode when the determination is affirmed.
  • the functional configuration of the CPU 61 in the temperature measurement mode is described using an example in which the temperature of the subject is measured based on the second infrared light and the third infrared light by the two-color temperature measurement method. is the temperature when the temperature of the subject is measured based on the first infrared light and the second infrared light, and when the temperature of the subject is measured based on the third infrared light and the fourth infrared light.
  • the functional configuration of the CPU 61 in the measurement mode is also the same as described above.
  • the dimming member 36 reduces the amount of the third near-infrared light out of the second near-infrared light and the third near-infrared light. Both light amounts of near-infrared light may be reduced. Similarly, the dimming member 36 may reduce the light amount of both the first near-infrared light and the second near-infrared light, and the light amount of both the third near-infrared light and the fourth near-infrared light. may be decreased.
  • step S11 the light source ON control unit 111 switches the light source 14 ON.
  • Light source 14 outputs illumination light IL when switched on.
  • step S ⁇ b>12 the wavelength selection unit 112 selects one wavelength band used for imaging according to the instruction received by the input device 78 .
  • step S13 the turret control unit 113 rotates the turret filter 35 to a position where the optical filter corresponding to the wavelength band selected by the wavelength selection unit 112 among the plurality of optical filters is inserted into the optical path.
  • step S14 the imaging control unit 114 causes the image sensor 15 to capture an image.
  • step S ⁇ b>15 the display control unit 115 causes the display 76 to display the captured image obtained by being captured by the image sensor 15 .
  • step S16 the termination determination unit 116 determines whether or not a condition for terminating the imaging mode (hereinafter referred to as "imaging mode termination condition") is satisfied.
  • An example of the imaging mode end condition is that the input device 78 has accepted an instruction to end the imaging mode.
  • step S16 if the imaging mode end condition is not satisfied, the determination is negative, and the process shown in FIG. 14 proceeds to step S12.
  • step S16 if the imaging mode end condition is satisfied, the determination is affirmative, and the process shown in FIG. 14 proceeds to step S17. Note that if the input device 78 does not accept an instruction to change the wavelength band after the process shown in FIG. The processing of the turret control unit 113 in is omitted.
  • step S17 the light source off control unit 117 switches the light source 14 off.
  • Light source 14 stops outputting illumination light IL when switched off.
  • step S21 the wavelength selection unit 121 selects two wavelength bands, that is, the first wavelength band and the second wavelength band, to be used for the two-color thermometry method.
  • step S22 the first turret control unit 122 rotates the turret filter 35 to a position where the BPF 83 corresponding to the first wavelength band selected by the wavelength selection unit 121 among the plurality of BPFs 83 is inserted into the optical path.
  • the first imaging control unit 123 causes the image sensor 15 to capture an image.
  • the first digital image data is thus obtained.
  • step S24 the second turret control unit 124 rotates the turret filter 35 to a position where, among the plurality of BPFs 83, the BPF 83 corresponding to the second wavelength band selected by the wavelength selection unit 121 is inserted into the optical path.
  • step S25 the dimming control unit 125 slides the dimming member 36 to a position where the dimming filter 93 corresponding to the BPF 83 inserted into the optical path among the multiple dimming filters 93 is inserted into the optical path.
  • the second imaging control unit 126 causes the image sensor 15 to capture an image. Thereby, the second digital image data is obtained.
  • step S27 the temperature derivation unit 127 calculates the temperature distribution of the subject by two-color thermometry based on the first digital image data and the second digital image data.
  • step S28 the display control unit 128 generates temperature information based on the temperature distribution of the subject calculated by the temperature derivation unit 127, and superimposes the temperature information on the captured image obtained in the same manner as in the above imaging mode.
  • the display 76 displays the superimposed image.
  • step S29 the termination determination unit 129 determines whether or not a condition for terminating the temperature measurement mode (hereinafter referred to as "temperature measurement mode termination condition") is satisfied.
  • a condition for terminating the temperature measurement mode hereinafter referred to as "temperature measurement mode termination condition”
  • An example of the temperature measurement mode end condition is that the input device 78 has accepted an instruction to end the temperature measurement mode.
  • step S29 if the conditions for terminating the temperature measurement mode are not satisfied, the determination is negative, and the process shown in step S29 proceeds to step S21.
  • step S29 if the conditions for ending the temperature measurement mode are satisfied, the determination is affirmative, and the processing shown in FIG. 15 ends.
  • the CPU 61 controls the position of focus by moving the focus lens 31 along the optical axis OA and adjusts the zoom magnification by moving the zoom lens 32 in each of the imaging mode and the temperature measurement mode. Control for adjustment is performed on the zoom drive mechanism 42 . Further, the CPU 61 controls the blur correction drive mechanism 44 to correct image blur by moving the blur correction lens 34 in each of the imaging mode and the temperature measurement mode. In addition, the CPU 61 controls the diaphragm drive mechanism 43 to adjust the amount of light passing through the diaphragm 33 by changing the diameter of the aperture 33A provided in the diaphragm 33 in each of the imaging mode and the temperature measurement mode. do. The CPU 61 also controls the adjustment drive mechanism 47 to adjust the focus position by moving the adjustment lens 37 in each of the imaging mode and the temperature measurement mode.
  • the turret filter 35 filters the second near-infrared light in the second wavelength band and the third near-infrared light in the third wavelength band from the light incident on the turret filter 35 .
  • the dimming member 36 reduces the amount of the third near-infrared light, thereby reducing the second radiance ratio between the second near-infrared light and the third near-infrared light. to correct.
  • the image sensor 15 receives the second near-infrared light and the third near-infrared light whose second radiance ratio is corrected by the dimming member 36, and responds to the irradiance of the second near-infrared light.
  • a third signal corresponding to the irradiance of the second signal and the third near-infrared light is output. Therefore, for example, compared to the case where the second radiance ratio of the second near-infrared light and the third near-infrared light is not corrected, the measurement accuracy when measuring the temperature of the subject by the two-color thermometry method is improved. can be made
  • FIG. 16 shows the values of the second signal and the values and It is a figure which compares the value of a 3rd signal.
  • the left side of FIG. 16 shows a graph when the second radiance ratio is not corrected, and the right side of FIG. 16 shows a graph when the second radiance ratio is corrected.
  • a bar graph showing the value of the second signal and a bar graph showing the value of the third signal are superimposed on the curve graph showing the spectral distribution of the thermal light source and the curve graph showing the spectral distribution of the object.
  • the CPU 61 calculates the temperature of the object based on the value of the second signal and the value of the third signal in which the second radiance ratio is corrected. derive Therefore, the temperature of the subject can be measured with higher accuracy than when the temperature of the subject is measured based on the second signal and the third signal whose second radiance ratio is not corrected.
  • the effect of the first embodiment is described with an example in which the temperature of the object is measured based on the second infrared light and the third infrared light by the two-color thermometry method.
  • the effects are the same as above. It is the same.
  • the turret filter 35 includes a first BPF 83A that transmits the first near-infrared light, a second BPF 83B that transmits the second near-infrared light, and a third near-infrared light. It has a third BPF 83C that transmits outside light and a fourth BPF 83D that transmits fourth near-infrared light.
  • the turret filter 35 rotates to a position for inserting the first BPF 83A into the optical path, a position for inserting the second BPF 83B into the optical path, a position for inserting the third BPF 83C into the optical path, and a position for inserting the fourth BPF 83D into the optical path.
  • the first near-infrared light in the first wavelength band, the second near-infrared light in the second wavelength band, the third near-infrared light in the third wavelength band, and The fourth near-infrared light in the fourth wavelength band can be selectively transmitted.
  • the dimming member 36 includes a dimming filter 93 that transmits near-infrared light and reduces the amount of near-infrared light. have. Therefore, the radiance ratio can be corrected by reducing the amount of near-infrared light with the neutral density filter 93 .
  • the thickness of the neutral density filter 93 is set to a thickness that forms an image of the near-infrared light on the light receiving surface of the image sensor 15 . Therefore, it is possible to suppress an error in the irradiance of the near-infrared light incident on the image sensor 15 depending on whether the near-infrared light is transmitted through the neutral density filter 93 or not.
  • the CPU 61 performs control to move the blur correction lens 34 in the direction in which blurring of the image is corrected when the temperature of the subject is measured using the two-color thermometry method.
  • the temperature of the subject can be measured with higher accuracy than when control for moving the blur correction lens 34 is not performed.
  • near-infrared light is used for the two-color thermometry method. Therefore, the influence of smoke or the like can be reduced when measuring the temperature of the subject. Also, even if there is glass between the camera 1 and the subject, the temperature of the subject can be measured. Furthermore, the temperature of the subject can be measured with high accuracy at the scene of the fire, compared to the case where the temperature of the subject is measured based on light other than near-infrared light. In addition, when the fire temperature is assumed to be around 1000 ° C, which is the standard fire temperature specified by ISO834, the difference in radiance of near-infrared light in two different wavelength bands is large. Measurement accuracy can be improved.
  • the CPU 61 when measuring the temperature of the subject using the two-color thermometry, uses the wavelength band from 950 nm to 1100 nm, the wavelength band from 1150 nm to 1350 nm, the wavelength band from 1500 nm to 1750 nm, and Two wavelength bands are selected from the wavelength band of 200 nm to 2400 nm. Therefore, by removing the wavelength band in which near-infrared light is absorbed by water vapor, the transmittance t1 can be regarded as equal to the transmittance t2 in Equation (1).
  • the CPU 61 when measuring the temperature of the subject using the two-color thermometry, uses the wavelength band from 950 nm to 1100 nm, the wavelength band from 1150 nm to 1350 nm, the wavelength band from 1500 nm to 1750 nm, and Two adjacent wavelength bands are selected in the wavelength band from 200 nm to 2400 nm. Therefore, in equation (1), the transmittance t1 can be considered equal to the transmittance t2, and the emissivity e1 can be considered equal to the emissivity e2.
  • the CPU 61 when measuring the temperature of the subject using the two-color thermometry, uses the wavelength band from 950 nm to 1100 nm, the wavelength band from 1150 nm to 1350 nm, the wavelength band from 1500 nm to 1750 nm, and From the wavelength band of 200 nm to 2400 nm, two wavelength bands are selected based on the temperature of the subject. Therefore, for example, the temperature of the object can be measured with high accuracy compared to the case of selecting two wavelength bands regardless of the temperature of the object.
  • the CPU 61 when measuring the temperature of the subject using the two-color thermometry, uses the wavelength band from 950 nm to 1100 nm, the wavelength band from 1150 nm to 1350 nm, the wavelength band from 1500 nm to 1750 nm, and A shorter wavelength band is selected from the wavelength band from 200 nm to 2400 nm as the temperature of the subject increases. Therefore, for example, the temperature of the object can be measured with high accuracy compared to the case of selecting two wavelength bands regardless of the temperature of the object.
  • the CPU 61 controls the zoom drive mechanism 42 to adjust the zoom magnification by moving the zoom lens 32 when the temperature of the subject is measured using the two-color thermometry method. . Therefore, for example, the temperature of the object can be measured with high precision compared to the case where the zoom magnification is not adjusted.
  • the camera 1 has an image sensor 15 . Therefore, in addition to measuring the temperature of the subject, the image sensor 15 can obtain a captured image of the subject.
  • the configuration of the camera 1 is changed as follows from the first embodiment.
  • the points of the second embodiment that are different from the first embodiment will be described below.
  • the turret filter 35, the turret drive mechanism 45, the turret drive circuit 55, the image sensor 15, the image sensor driver 71, and the signal in the first embodiment are used.
  • a prism 130, a first image sensor 141, a second image sensor 142, a third image sensor 143, a first image sensor driver 151, a second image sensor driver 152, a third image sensor driver 153, a third A first signal processing circuit 161, a second signal processing circuit 162, and a third signal processing circuit 163 are used.
  • the prism 130 has a first prism 131 , a second prism 132 and a light guide member 133 .
  • the first prism 131 has a first reflecting surface 131A that reflects the first near-infrared light and transmits the second near-infrared light and the third near-infrared light.
  • the second prism 132 is attached to the first reflecting surface 131A.
  • the second prism 132 has a second reflecting surface 132A that reflects the second near-infrared light and transmits the third near-infrared light.
  • the light guide member 133 is attached to the second reflecting surface 132A.
  • the prism 130 selectively transmits light of different wavelength bands among the light incident on the prism 130 by the first prism 131 and the second prism 132 .
  • the prism 130 uses the first prism 131 and the second prism 132 to separate the light incident on the prism 130 into lights of different wavelength bands.
  • the prism 130 is an example of the "first optical element" according to the technology of the present disclosure.
  • the first near-infrared light is an example of the "first light” according to the technology of the present disclosure
  • the second near-infrared light is the The first reflecting surface 131A is an example of the "second light” according to the technology disclosed herein
  • the first reflecting surface 131A is an example of the "reflecting surface that reflects the first light and transmits the second light”.
  • the second near-infrared light is an example of the "first light” according to the technology of the present disclosure
  • the third near-infrared light is the
  • the second reflecting surface 132A is an example of a "second light” according to technology disclosed herein, and an example of a "reflecting surface that reflects the first light and transmits the second light".
  • the first image sensor 141 is attached to the first prism 131, the second image sensor 142 is attached to the second prism 132, and the third image sensor 143 is attached to the light guide member 133. .
  • the first image sensor 141 captures the first near-infrared light and outputs first analog image data obtained by capturing the first near-infrared light.
  • the second image sensor 142 captures the second near-infrared light and outputs second analog image data obtained by capturing the second near-infrared light.
  • the third image sensor 143 captures the third near-infrared light and outputs third analog image data obtained by capturing the third near-infrared light.
  • the first image sensor 141, the second image sensor 142, and the third image sensor 143 are examples of "sensors" according to the technology of the present disclosure.
  • the first image sensor 141 is an example of the “first sensor” according to the technology of the present disclosure
  • the second image sensor 142 is the It is an example of the "second sensor”.
  • the second image sensor 142 is an example of the “first sensor” according to the technology of the present disclosure
  • the third image sensor 143 is the “first sensor” according to the technology of the present disclosure. It is an example of the "second sensor”.
  • the first image sensor driver 151 causes the first image sensor 141 to capture the first near-infrared light according to the imaging command output from the CPU 61 .
  • the 2nd image sensor driver 152 makes the 2nd image sensor 142 image a 2nd near-infrared light according to the imaging command output from CPU61.
  • the 3rd image sensor driver 153 makes the 3rd image sensor 143 image a 3rd near-infrared light according to the imaging command output from CPU61.
  • the first signal processing circuit 161 performs various signal processing on the first analog image data output from the first image sensor 141 to generate and output first digital image data.
  • the second signal processing circuit 162 performs various signal processing on the second analog image data output from the second image sensor 142 to generate and output second digital image data.
  • the third signal processing circuit 163 performs various signal processing on the third analog image data output from the third image sensor 143 to generate and output third digital image data.
  • the dimming member 36 has a first dimming filter 93A and a second dimming filter 93B.
  • the dimming member 36 is an example of the "second optical element" according to the technology of the present disclosure.
  • the light-reducing member 36 slides to a position where it escapes from the optical path, a position where the first light-attenuating filter 93A is inserted into the light path, and a position where the second light-attenuating filter 93B is inserted into the light path.
  • the dimming member 36 is arranged at a position away from the optical path.
  • the first image sensor 141 captures the first near-infrared light and dims the light.
  • the light reducing member 36 slides to the position where the first light reducing filter 93A is inserted into the optical path.
  • the first near-infrared light passes through the first prism 131 and forms an image on the first image sensor 141 .
  • the second near-infrared light passes through the first light-attenuating filter 93A, the first prism 131, and the second prism 132, and passes through the second image sensor 142. is imaged to
  • the dimming member 36 slides to a position where it escapes from the optical path, and when the third image sensor 143 captures the third near-infrared light, the dimming member 36 slides to a position where the second dimming filter 93B is inserted into the optical path. do.
  • the second near-infrared light passes through the first prism 131 and the second prism 132 and forms an image on the second image sensor 142 .
  • the third near-infrared light passes through the second light-attenuating filter 93B, the first prism 131, the second prism 132, and the light guide member 133.
  • An image is formed on the third image sensor 143 .
  • the amount of light attenuation by the first light attenuation filter 93A is the first near-infrared light that passes through the first prism 131 and is incident on the first image sensor 141, the first light attenuation filter 93A, the first prism 131, and the second near-infrared light.
  • the radiance ratio (hereinafter referred to as the first radiance ratio) with the second near-infrared light that passes through the prism 132 and enters the second image sensor 142 is the first near-infrared light and the second near-infrared light.
  • the dimming amount is set to be equal to a radiance ratio predetermined for light (hereinafter referred to as a first predetermined radiance ratio).
  • the amount of light attenuation by the first light attenuation filter 93A is set as follows.
  • the first near-infrared light emitted from a thermal light source having a known spectral distribution and transmitted through the first prism 131 is received by the first InGaAs diode of the first image sensor 141, whereby a first signal is generated from the first InGaAs diode. output.
  • the second near-infrared light emitted from the thermal light source and transmitted through the first neutral density filter 93A, the first prism 131, and the second prism 132 passes through the second InGaAs diode of the second image sensor 142 (same as the first InGaAs diode described above).
  • a second signal is output from the second InGaAs diode by receiving the light at the position diode).
  • the first radiance ratio corresponds to the ratio between the value of the first signal output from the first InGaAs diode and the value of the second signal output from the second InGaAs diode.
  • the first predetermined radiance ratio corresponds to the radiance ratio of the first near-infrared light and the second near-infrared light calculated from the known spectral distribution of the heat light source.
  • the amount of light attenuation by the first neutral density filter 93A is set to the amount of light attenuation that makes the first radiance ratio equal to the first predetermined radiance ratio.
  • the amount of light attenuation by the second light attenuation filter 93B is the second near-infrared light that passes through the first prism 131 and the second prism 132 and enters the second image sensor 142, the second light attenuation filter 93B, the The radiance ratio (hereinafter referred to as the second radiance ratio) with the third near-infrared light that passes through the first prism 131, the second prism 132, and the light guide member 133 and enters the third image sensor 143 is
  • the dimming amount is set to be equal to a predetermined radiance ratio (hereinafter referred to as a second predetermined radiance ratio) for the second near-infrared light and the third near-infrared light.
  • a predetermined radiance ratio hereinafter referred to as a second predetermined radiance ratio
  • the amount of light attenuation by the second light attenuation filter 93B is set as follows.
  • the second near-infrared light emitted from a thermal light source having a known spectral distribution and transmitted through the first prism 131 and the second prism 132 is received by the second InGaAs diode of the second image sensor 142, thereby generating the second InGaAs diode outputs the second signal.
  • the third near-infrared light emitted from the thermal light source and transmitted through the second neutral density filter 93B, the first prism 131, the second prism 132, and the light guide member 133 passes through the third InGaAs diode of the third image sensor 143 (the above-mentioned
  • a third signal is output from the third InGaAs diode when light is received by the diode at the same position as the second InGaAs diode.
  • the second radiance ratio corresponds to the ratio between the value of the second signal output from the second InGaAs diode and the value of the third signal output from the third InGaAs diode.
  • the second predetermined radiance ratio corresponds to the radiance ratio of the second near-infrared light and the third near-infrared light calculated from the known spectral distribution of the heat light source.
  • the amount of light attenuation by the second neutral density filter 93B is set to the amount of light attenuation that makes the second radiance ratio equal to the second predetermined radiance ratio.
  • the thickness of the first neutral density filter 93A is set to a thickness that causes the second near-infrared light transmitted through the first prism 131 and the second prism 132 to form an image on the light receiving surface of the second image sensor 142.
  • the thickness of the second neutral density filter 93B causes the third near-infrared light transmitted through the first prism 131, the second prism 132, and the light guide member 133 to form an image on the light receiving surface of the third image sensor 143. thickness is set.
  • the CPU 61 functions as a light source ON control unit 111, an image capturing control unit 114, a display control unit 115, an end determination unit 116, and a light source OFF control unit 117 in the imaging mode.
  • the light source ON control unit 111 outputs an ON command to the light source control circuit 73 .
  • the light source control circuit 73 switches the light source 14 ON.
  • Light source 14 outputs illumination light IL when switched on.
  • the imaging control unit 114 outputs imaging commands to the first image sensor driver 151, the second image sensor driver 152, and the third image sensor driver 153.
  • the first image sensor driver 151 upon receiving the imaging command, causes the first image sensor 141 to capture the first near-infrared light.
  • the second image sensor driver 152 upon receiving the imaging command, causes the second image sensor 142 to capture the second near-infrared light.
  • the 3rd image sensor driver 153 will make the 3rd image sensor 143 image a 3rd near-infrared light, if an imaging command is received.
  • the first image sensor 141 captures the first near-infrared light and outputs first analog image data obtained by capturing the first near-infrared light.
  • the second image sensor 142 captures the second near-infrared light and outputs second analog image data obtained by capturing the second near-infrared light.
  • the third image sensor 143 captures the third near-infrared light and outputs third analog image data obtained by capturing the third near-infrared light.
  • the first signal processing circuit 161 generates and outputs first digital image data by performing various signal processing on the first analog image data.
  • the second signal processing circuit 162 generates and outputs second digital image data by performing various signal processing on the second analog image data.
  • the third signal processing circuit 163 generates and outputs third digital image data by performing various signal processing on the third analog image data.
  • the display control unit 115 controls the display control circuit 77 to display the captured image on the display 76 based on the first digital image data, the second digital data, and the third digital data. Thereby, the captured image is displayed on the display 76 .
  • the captured image is displayed as a moving image, for example, but may be displayed as a still image.
  • the termination determination unit 116 determines whether or not to terminate the imaging mode. If the determination is negative, the termination determination unit 116 continues the imaging mode.
  • the light source off control unit 117 outputs an off command to the light source control circuit 73 when the end determination unit 116 makes an affirmative determination. Upon receiving the off command, the light source control circuit 73 switches off the light source 14 . Light source 14 stops outputting illumination light IL when switched off.
  • the CPU 61 in the temperature measurement mode, includes a wavelength selection unit 121, a first imaging control unit 123, a dimming control unit 125, a second imaging control unit 126, a temperature derivation unit 127, a display control unit 128 and an end determination unit 129 .
  • the wavelength selection unit 121 selects two wavelength bands, that is, the first wavelength band and the second wavelength band, to be used for the two-color thermometry method.
  • the wavelength selection unit 121 uses a first near-infrared light wavelength band of 950 nm to 1100 nm, a second near-infrared light wavelength band of 1150 nm to 1350 nm, and 1500 nm as the first wavelength band and the second wavelength band.
  • Two wavelength bands are selected from the third near-infrared wavelength band of 1750 nm from .
  • the method by which the wavelength selector 121 selects two wavelength bands is the same as in the first embodiment.
  • the wavelength selection unit 121 selects the wavelength band of the first infrared light as the first wavelength band and selects the wavelength band of the second infrared light as the second wavelength band will be taken as an example.
  • the first imaging control unit 123, the dimming control unit 125, the second imaging control unit 126, and the temperature deriving unit 127 will be described.
  • the first near-infrared light is an example of the "first light” according to the technology of the present disclosure
  • the second near-infrared light is an example of the "second light” according to the technology of the present disclosure. be.
  • the first imaging control unit 123 outputs an imaging command to the first image sensor driver 151 corresponding to the wavelength band of the first near-infrared light.
  • the first image sensor driver 151 upon receiving the imaging command, causes the first image sensor 141 to capture the first near-infrared light.
  • the first image sensor 141 captures the first near-infrared light, it outputs first analog image data, and the first signal processing circuit 161 performs various signal processing on the first analog image data.
  • a first digital image data is generated and output.
  • the dimming control unit 125 outputs a slide command to the dimming drive circuit 56 to insert the first dimming filter 93A corresponding to the wavelength band of the second near-infrared light into the optical path.
  • the dimming drive circuit 56 drives the dimming drive mechanism 46 to slide the dimming member 36 to the position where the first dimming filter 93A is inserted into the optical path.
  • the second imaging control unit 126 outputs an imaging command to the second image sensor driver 152 corresponding to the wavelength band of the second near-infrared light.
  • the second image sensor driver 152 upon receiving the imaging command, causes the second image sensor 142 to capture the second near-infrared light.
  • the second image sensor 142 captures the second near-infrared light, it outputs second analog image data, and the second signal processing circuit 162 performs various signal processing on the second analog image data.
  • a second digital image data is generated and output.
  • the temperature derivation unit 127 calculates the temperature distribution of the subject by two-color thermometry based on the first digital image data and the second digital image data.
  • the method by which the temperature derivation unit 127 calculates the temperature distribution of the subject is the same as in the first embodiment.
  • the display control unit 128 generates temperature information based on the temperature distribution of the subject calculated by the temperature deriving unit 127, and superimposes the temperature information on the captured image obtained in the same manner as in the above-described imaging mode. is displayed on the display 76 with respect to the display control circuit 77 .
  • the termination determination unit 129 determines whether to terminate the temperature measurement mode. The termination determination unit 129 continues the temperature measurement mode when the determination is negative, and terminates the temperature measurement mode when the determination is affirmed.
  • the functional configuration of the CPU 61 in the temperature measurement mode is described with an example in which the temperature of the subject is measured based on the first infrared light and the second infrared light by the two-color temperature measurement method.
  • the functional configuration of the CPU 61 in the temperature measurement mode when the temperature of the object is measured based on the second infrared light and the third infrared light is also the same as described above.
  • the dimming member 36 reduces the amount of the second near-infrared light out of the first near-infrared light and the second near-infrared light. Both light amounts of near-infrared light may be reduced. Similarly, the dimming member 36 may reduce the amount of both the second near-infrared light and the third near-infrared light.
  • step S31 the light source ON control unit 111 switches the light source 14 ON.
  • Light source 14 outputs illumination light IL when switched on.
  • step S32 the imaging control unit 114 causes the first image sensor 141, the second image sensor 142, and the third image sensor 143 to image.
  • step S ⁇ b>33 the display control unit 115 causes the display 76 to display captured images captured by the first image sensor 141 , the second image sensor 142 , and the third image sensor 143 .
  • step S34 the termination determination unit 116 determines whether or not a condition for terminating the imaging mode (hereinafter referred to as "imaging mode termination condition") is satisfied.
  • a condition for terminating the imaging mode hereinafter referred to as "imaging mode termination condition”
  • An example of the imaging mode end condition is that the input device 78 has accepted an instruction to end the imaging mode.
  • the imaging mode end condition is that the input device 78 has accepted an instruction to end the imaging mode.
  • step S34 if the imaging mode end condition is not satisfied, the determination is negative, and the process shown in FIG. 19 proceeds to step S32.
  • step S34 if the imaging mode termination condition is satisfied, the determination is affirmative, and the processing shown in FIG. 19 proceeds to step S35.
  • step S35 the light source off control unit 117 switches the light source 14 off.
  • Light source 14 stops outputting illumination light IL when switched off.
  • step S41 the wavelength selection unit 121 selects two wavelength bands, that is, the first wavelength band and the second wavelength band, to be used for the two-color thermometry method.
  • step S42 the first imaging control unit 123 selects the image sensor corresponding to the first wavelength band selected by the wavelength selection unit 121 among the first image sensor 141, the second image sensor 142, and the third image sensor 143. to take an image. Thereby, the first digital image data is obtained.
  • step S ⁇ b>43 the dimming control unit 125 places a dimming member at a position where the dimming filter 93 corresponding to the second wavelength band selected by the wavelength selection unit 121 among the plurality of dimming filters 93 is inserted into the optical path. Slide 36.
  • step S44 the second imaging control unit 126 selects the image sensor corresponding to the second wavelength band selected by the wavelength selection unit 121 among the first image sensor 141, the second image sensor 142, and the third image sensor 143. to take an image. Thereby, the second digital image data is obtained.
  • step S45 the temperature derivation unit 127 calculates the temperature distribution of the subject by two-color thermometry based on the first digital image data and the second digital image data.
  • step S46 the display control unit 128 generates temperature information based on the temperature distribution of the subject calculated by the temperature deriving unit 127, and superimposes the temperature information on the captured image obtained in the same manner as in the above imaging mode.
  • the display 76 displays the superimposed image.
  • step S47 the termination determination unit 129 determines whether or not a condition for terminating the temperature measurement mode (hereinafter referred to as "temperature measurement mode termination condition") is satisfied.
  • a condition for terminating the temperature measurement mode hereinafter referred to as "temperature measurement mode termination condition”
  • An example of the temperature measurement mode end condition is that the input device 78 has accepted an instruction to end the temperature measurement mode.
  • step S47 if the temperature measurement mode end condition is not satisfied, the determination is negative, and the process shown in step S47 proceeds to step S41.
  • step S47 if the temperature measurement mode end condition is satisfied, the determination is affirmative, and the processing shown in FIG. 20 ends.
  • the CPU 61 controls the position of focus by moving the focus lens 31 along the optical axis OA and adjusts the zoom magnification by moving the zoom lens 32 in each of the imaging mode and the temperature measurement mode. Control for adjustment is performed on the zoom drive mechanism 42 . Further, the CPU 61 controls the blur correction drive mechanism 44 to correct image blur by moving the blur correction lens 34 in each of the imaging mode and the temperature measurement mode. In addition, the CPU 61 controls the diaphragm drive mechanism 43 to adjust the amount of light passing through the diaphragm 33 by changing the diameter of the aperture 33A provided in the diaphragm 33 in each of the imaging mode and the temperature measurement mode. do. The CPU 61 also controls the adjustment drive mechanism 47 to adjust the focus position by moving the adjustment lens 37 in each of the imaging mode and the temperature measurement mode.
  • the prism 130 converts light incident on the prism 130 into first near-infrared light in the first wavelength band and second near-infrared light in the second wavelength band.
  • the attenuating member 36 corrects the first radiance ratio of the first near-infrared light and the second near-infrared light by reducing the amount of the second near-infrared light.
  • the first image sensor 141 and the second image sensor 142 receive the first near-infrared light and the second near-infrared light, the first radiance ratio of which is corrected by the dimming member 36, respectively.
  • the sensor 141 outputs a first signal according to the irradiance of the first near-infrared light
  • the second image sensor 142 outputs a second signal according to the irradiance of the second near-infrared light. Therefore, for example, compared to the case where the first radiance ratio of the first near-infrared light and the second near-infrared light is not corrected, the measurement accuracy when measuring the temperature of the subject by the two-color thermometry method is improved. can be made
  • the effect of the second embodiment is described with an example in which the temperature of the subject is measured based on the first infrared light and the second infrared light by the two-color thermometry method.
  • the effect of measuring the temperature of the object based on the second infrared light and the third infrared light is the same as above.
  • the prism 130 includes a first prism 131 having a first reflecting surface 131A that reflects the first near-infrared light and transmits the second near-infrared light and the third near-infrared light.
  • a second prism 132 having a second reflecting surface 132A that reflects the second near-infrared light and transmits the third near-infrared light.
  • the camera 1 includes the first image sensor 141 that outputs the first signal according to the irradiance of the first near-infrared light, and the second signal according to the irradiance of the second near-infrared light.
  • a second image sensor 142 that outputs two signals and a third image sensor 143 that outputs a third signal according to the irradiance of the third near-infrared light are provided. Therefore, for example, when the CPU 61 is in the imaging mode, the first image sensor 141, the second image sensor 142, and the third image sensor 143 can image near-infrared light in a plurality of wavelength bands in parallel. can.
  • the configuration of the camera 1 is changed as follows from the first embodiment.
  • the points of the third embodiment that are different from the first embodiment will be described below.
  • a polarizing filter unit 170 and a polarization image sensor 180 are used.
  • the polarizing filter unit 170 is arranged closer to the subject than the polarizing image sensor 180 is.
  • the polarizing filter unit 170 includes a first BPF 83A, a second BPF 83B, a third BPF 83C, a first polarizing filter 173A, a second polarizing filter 173B, and a third polarizing filter 173C.
  • the configurations of the first BPF 83A, the second BPF 83B, and the third BPF 83C are the same as in the first embodiment.
  • the polarizing filter unit 170 selectively transmits light of different wavelength bands out of the light incident on the polarizing filter unit 170 by the first BPF 83A, the second BPF 83B, and the third BPF 83C.
  • the polarizing filter unit 170 is an example of the "first optical element" according to the technology of the present disclosure.
  • the first polarizing filter 173A is superimposed on the first BPF 83A
  • the second polarizing filter 173B is superimposed on the second BPF 83B
  • the third polarizing filter 173C is superimposed on the third BPF 83C.
  • the first polarizing filter 173A, the second polarizing filter 173B, and the third polarizing filter 173C may be arranged on the subject side of the first BPF 83A, the second BPF 83B, and the third BPF 83C, and the images of the first BPF 83A, the second BPF 83B, and the third BPF 83C may be placed on the side.
  • the first polarizing filter 173A transmits the first light component vibrating in the direction of 90° out of the light incident on the polarizing filter unit 170, and the second polarizing filter 173B enters the polarizing filter unit 170.
  • the third polarizing filter 173C transmits the second light component that vibrates in the direction of 120° out of the light, and transmits the third light component that vibrates in the direction of 240° out of the light incident on the polarizing filter unit 170.
  • the polarization image sensor 180 has a plurality of physical pixels.
  • the plurality of physical pixels are photodiodes sensitive to near-infrared light.
  • the multiple physical pixels include multiple first physical pixels 181A, multiple second physical pixels 181B, and multiple third physical pixels 181C.
  • a first polarizing filter 183A is assigned to the plurality of first physical pixels 181A
  • a second polarizing filter 183B is assigned to the plurality of second physical pixels 181B
  • a plurality of third physical pixels 181C is assigned a is assigned the third polarizing filter 183C.
  • the polarization image sensor 180 is an example of the "sensor” and the "first image sensor” according to the technology of the present disclosure.
  • the first polarizing filter 173A is an example of the "first polarizing filter” according to the technology of the present disclosure
  • the second polarizing filter 173B is the technology of the present disclosure.
  • the first light component that vibrates in the direction of 90° is an example of the “second polarizing filter” according to the technology of the present disclosure, and is an example of the “first light component that vibrates in the first direction” according to the technology of the present disclosure.
  • the second light component vibrating in the direction of ° is an example of the “second light component vibrating in the second direction” according to the technology of the present disclosure.
  • the second polarizing filter 173B is an example of the "first polarizing filter” according to the technology of the present disclosure
  • the third polarizing filter 173C is the technology of the present disclosure.
  • the second light component that vibrates in the direction of 120° is an example of the "first light component that vibrates in the first direction” according to the technology of the present disclosure
  • the third light component vibrating in the direction of ° is an example of the “second light component vibrating in the second direction” according to the technology of the present disclosure.
  • the first physical pixel 181A is an example of the "first physical pixel” according to the technology of the present disclosure
  • the second physical pixel 181B is the technology of the present disclosure.
  • the second physical pixel 181B and the third physical pixel 181C is an example of the "first physical pixel” according to the technology of the present disclosure
  • the third physical pixel 181C is the technology of the present disclosure. is an example of the "second physical pixel” according to.
  • the first polarizing filter 183A is an example of the "third polarizing filter” according to the technology of the present disclosure
  • the second polarizing filter 183B is the technology of the present disclosure.
  • the second polarizing filter 183B is an example of the "third polarizing filter” according to the technology of the present disclosure
  • the third polarizing filter 183C is the technology of the present disclosure. It is an example of the "fourth polarizing filter” according to.
  • the first polarizing filter 183A corresponds to the first polarizing filter 173A, and the first near-infrared light transmitted through the first BPF 83A and the first polarizing filter 173A filter (that is, the near-infrared light vibrating in the direction of 90°) pass through.
  • the second polarizing filter 183B corresponds to the second polarizing filter 173B, and the second near-infrared light transmitted through the second BPF 83B and the second polarizing filter 173B filter (that is, the near-infrared light vibrating in the direction of 120°) pass through.
  • the third polarizing filter 183C corresponds to the third polarizing filter 173C, and the third near-infrared light transmitted through the third BPF 83C and the third polarizing filter 173C filter (that is, the near-infrared light vibrating in the direction of 240°) pass through.
  • the first polarizing filter 183A, the second polarizing filter 183B, and the third polarizing filter 183C will be referred to as the polarizing filters 183 unless they need to be distinguished and described.
  • the image sensor driver 71 causes a plurality of physical pixels to image light according to the imaging command output from the CPU 61 .
  • the plurality of first physical pixels 181A output first analog image data obtained by capturing the first near-infrared light.
  • the plurality of second physical pixels 181B output second analog image data obtained by capturing the second near-infrared light.
  • the multiple third physical pixels 181C output the third analog image data obtained by capturing the third near-infrared light.
  • the signal processing circuit 72 performs various signal processing on the first analog image data to generate and output the first digital image data, and performs various signal processing on the second analog image data.
  • the second digital image data is generated and output, and various signal processing is performed on the third analog image data to generate and output the third digital image data.
  • the dimming member 36 has a first dimming filter 93A and a second dimming filter 93B.
  • the light-reducing member 36 slides to a position where it escapes from the optical path, a position where the first light-attenuating filter 93A is inserted into the light path, and a position where the second light-attenuating filter 93B is inserted into the light path.
  • the dimming member 36 is arranged at a position away from the optical path.
  • the temperature measurement mode of the CPU 61 described later when temperature measurement is performed based on the first near-infrared light and the second near-infrared light, when the plurality of first physical pixels 181A capture the first near-infrared light
  • the dimming member 36 slides to the position where it escapes from the optical path, and the plurality of second physical pixels 181B captures the second near-infrared light
  • the dimming member 36 is moved to the position where the first dimming filter 93A is inserted into the optical path. slides.
  • the first near-infrared light passes through the first BPF 83A, the first polarizing filter 173A, and the first polarizing filter 183A and forms an image on the plurality of first physical pixels 181A.
  • the first neutral density filter 93A is inserted in the optical path
  • the second near-infrared light passes through the second BPF 83B, the second polarizing filter 173B, the first neutral density filter 93A, and the second polarizing filter 183B.
  • An image is formed on a plurality of second physical pixels 181B.
  • the plurality of second physical pixels 181B capture the second near-infrared light.
  • the dimming member 36 slides to the position where it escapes from the optical path, and when the plurality of third physical pixels 181C captures the third near-infrared light, the second dimming filter 93B is inserted into the optical path. Member 36 slides.
  • the second near-infrared light passes through the second BPF 83B, the second polarizing filter 173B, and the second polarizing filter 183B and forms an image on the plurality of second physical pixels 181B.
  • the second light-attenuating filter 93B is inserted in the optical path
  • the third near-infrared light passes through the third BPF 83C, the third polarizing filter 173C, the second light-attenuating filter 93B, and the third polarizing filter 183C.
  • An image is formed on a plurality of third physical pixels 181C.
  • the amount of light attenuation by the first light attenuation filter 93A is the first near-infrared light that passes through the first BPF 83A, the first polarizing filter 173A, and the first polarizing filter 183A and enters the first physical pixel 181A, the second BPF 83B, the The radiance ratio with the second near-infrared light that is incident on the second physical pixel 181B through the two polarizing filters 173B, the first neutral density filter 93A, and the first polarizing filter 183A (hereinafter referred to as the first radiance ratio ) is set to a dimming amount equal to a predetermined radiance ratio (hereinafter referred to as a first predetermined radiance ratio) for the first near-infrared light and the second near-infrared light.
  • the amount of light attenuation by the first light attenuation filter 93A is set as follows.
  • the first near-infrared light emitted from a thermal light source having a known spectral distribution and transmitted through the first BPF 83A, the first polarizing filter 173A, and the first polarizing filter 183A is received by the first physical pixel 181A.
  • a first signal is output from one physical pixel 181A.
  • the second near-infrared light emitted from the thermal light source and transmitted through the second BPF 83B, the second polarizing filter 173B, the first neutral density filter 93A, and the second polarizing filter 183B is the second physical pixel 181B (the above-described first physical pixel 181A), a second signal is output from the second physical pixel 181B.
  • the first radiance ratio corresponds to the ratio between the value of the first signal output from the first physical pixel 181A and the value of the second signal output from the second physical pixel 181B.
  • the first predetermined radiance ratio corresponds to the radiance ratio of the first near-infrared light and the second near-infrared light calculated from the known spectral distribution of the heat light source.
  • the amount of light attenuation by the first neutral density filter 93A is set to the amount of light attenuation that makes the first radiance ratio equal to the first predetermined radiance ratio.
  • the amount of light attenuation by the second light attenuation filter 93B is the second near-infrared light that passes through the second BPF 83B, the second polarizing filter 173B, and the second polarizing filter 183B and enters the second physical pixel 181B, and the third BPF 83C.
  • the second radiance ratio is set to a dimming amount equal to a predetermined radiance ratio (hereinafter referred to as a second predetermined radiance ratio) for the first near-infrared light and the second near-infrared light.
  • a predetermined radiance ratio hereinafter referred to as a second predetermined radiance ratio
  • the amount of light attenuation by the second light attenuation filter 93B is set as follows.
  • the second near-infrared light emitted from a thermal light source having a known spectral distribution and transmitted through the second BPF 83B, the second polarizing filter 173B, and the second polarizing filter 183B is received by the second physical pixel 181B, whereby the second A second signal is output from the two physical pixels 181B.
  • the third near-infrared light emitted from the thermal light source and transmitted through the third BPF 83C, the third polarizing filter 173C, the second neutral density filter 93B, and the third polarizing filter 183C is the third physical pixel 181C (the above-described second physical pixel 181B), a third signal is output from the third physical pixel 181C.
  • the second radiance ratio corresponds to the ratio between the value of the second signal output from the second physical pixel 181B and the value of the third signal output from the third physical pixel 181C.
  • the second predetermined radiance ratio corresponds to the radiance ratio of the second near-infrared light and the third near-infrared light calculated from the known spectral distribution of the heat light source.
  • the amount of light attenuation by the second neutral density filter 93B is set to the amount of light attenuation that makes the second radiance ratio equal to the second predetermined radiance ratio.
  • the thickness of the first light-attenuating filter 93A is such that the second near-infrared light transmitted through the second BPF 83B, the second polarizing filter 173B, the first light-attenuating filter 93A, and the second polarizing filter 183B passes through the light receiving surface of the image sensor 15. is set to a thickness that forms an image on the Similarly, the thickness of the second light-attenuating filter 93B is such that the image sensor 15 receives the third near-infrared light transmitted through the third BPF 83C, the third polarizing filter 173C, the second light-attenuating filter 93B, and the third polarizing filter 183C. The thickness is set to form an image on the surface.
  • the CPU 61 functions as a light source ON control unit 111, an image capturing control unit 114, a display control unit 115, an end determination unit 116, and a light source OFF control unit 117 in the imaging mode.
  • the light source ON control unit 111 outputs an ON command to the light source control circuit 73 .
  • the light source control circuit 73 switches the light source 14 ON.
  • Light source 14 outputs illumination light IL when switched on.
  • the imaging control unit 114 outputs an imaging command to the image sensor driver 71 .
  • the image sensor driver 71 causes the polarization image sensor 180 to image the first near-infrared light, the second near-infrared light, and the third near-infrared light.
  • 181 A of some 1st physical pixels image the 1st near-infrared light, and output the 1st analog image data obtained by imaging the 1st near-infrared light.
  • the plurality of second physical pixels 181B capture second near-infrared light and output second analog image data obtained by capturing the second near-infrared light.
  • 181 C of several 3rd physical pixels image the 3rd near-infrared light, and output the 3rd analog image data obtained by imaging the 3rd near-infrared light.
  • the signal processing circuit 72 generates first digital image data by performing various signal processing on the first analog image data, and generates second digital image data by performing various signal processing on the second analog image data. Image data is generated, and various signal processing is performed on the third analog image data to generate and output third digital image data.
  • the display control unit 115 controls the display control circuit 77 to display the captured image on the display 76 based on the first digital image data, the second digital data, and the third digital data. Thereby, the captured image is displayed on the display 76 .
  • the captured image is displayed as a moving image, for example, but may be displayed as a still image.
  • the termination determination unit 116 determines whether or not to terminate the imaging mode. If the determination is negative, the termination determination unit 116 continues the imaging mode.
  • the light source off control unit 117 outputs an off command to the light source control circuit 73 when the end determination unit 116 makes an affirmative determination. Upon receiving the off command, the light source control circuit 73 switches off the light source 14 . Light source 14 stops outputting illumination light IL when switched off.
  • the CPU 61 in the temperature measurement mode, includes a wavelength selection unit 121, a first imaging control unit 123, a dimming control unit 125, a second imaging control unit 126, a temperature derivation unit 127, a display control unit, 128 and an end determination unit 129 .
  • the wavelength selection unit 121 selects two wavelength bands, that is, the first wavelength band and the second wavelength band, to be used for the two-color thermometry method.
  • the wavelength selection unit 121 uses a first near-infrared light wavelength band of 950 nm to 1100 nm, a second near-infrared light wavelength band of 1150 nm to 1350 nm, and 1500 nm as the first wavelength band and the second wavelength band.
  • Two wavelength bands are selected from the third near-infrared wavelength band of 1750 nm from .
  • the method by which the wavelength selector 121 selects two wavelength bands is the same as in the first embodiment.
  • the wavelength selection unit 121 selects the wavelength band of the first infrared light as the first wavelength band and selects the wavelength band of the second infrared light as the second wavelength band will be taken as an example.
  • the first imaging control unit 123, the dimming control unit 125, the second imaging control unit 126, and the temperature deriving unit 127 will be described.
  • the first near-infrared light is an example of the "first light” according to the technology of the present disclosure
  • the second near-infrared light is an example of the "second light” according to the technology of the present disclosure. be.
  • the first imaging control unit 123 outputs an imaging command to the image sensor driver 71 .
  • the image sensor driver 71 causes the polarization image sensor 180 to image the first near-infrared light, the second near-infrared light, and the third near-infrared light.
  • the signal processing circuit 72 outputs the first analog image data.
  • the dimming control unit 125 issues a slide command to the dimming drive circuit 56 to insert the first neutral density filter 93A into the optical path.
  • the dimming drive circuit 56 drives the dimming drive mechanism 46 to slide the dimming member 36 to the position where the first dimming filter 93A is inserted into the optical path.
  • the first light-attenuating filter 93A When the first light-attenuating filter 93A is inserted into the optical path, the light incident on the first light-attenuating filter 93A is attenuated by the first light-attenuating filter 93A. Thereby, the first near-infrared light that has passed through the first BPF 83A, the first polarizing filter 173A, and the first polarizing filter 183A but has not passed through the neutral density filter 93, the second BPF 83B, the second polarizing filter 173B, The radiance ratio with the second near-infrared light transmitted through the first neutral density filter 93A and the second polarizing filter 183B is corrected.
  • the second near-infrared light transmitted through the second BPF 83B, the second polarizing filter 173B, the first neutral density filter 93A, and the second polarizing filter 183B forms an image on the light receiving surface of the polarization image sensor 180.
  • FIG. 1 the second near-infrared light transmitted through the second BPF 83B, the second polarizing filter 173B, the first neutral density filter 93A, and the second polarizing filter 183B forms an image on the light receiving surface of the polarization image sensor 180.
  • the second imaging control unit 126 outputs imaging commands to the image sensor driver 71 .
  • the image sensor driver 71 causes the polarization image sensor 180 to image the first near-infrared light, the second near-infrared light, and the third near-infrared light.
  • the plurality of second physical pixels 181B corresponding to the wavelength band of the second near-infrared light capture the second near-infrared light, they output the second analog image data, and the signal processing circuit 72 outputs the second analog image data.
  • 2nd digital image data are produced
  • the temperature derivation unit 127 calculates the temperature distribution of the subject by two-color thermometry based on the first digital image data and the second digital image data.
  • the method by which the temperature derivation unit 127 calculates the temperature distribution of the subject is the same as in the first embodiment.
  • the display control unit 128 generates temperature information based on the temperature distribution of the subject calculated by the temperature deriving unit 127, and superimposes the temperature information on the captured image obtained in the same manner as in the above-described imaging mode. is displayed on the display 76 with respect to the display control circuit 77 .
  • the termination determination unit 129 determines whether to terminate the temperature measurement mode. The termination determination unit 129 continues the temperature measurement mode when the determination is negative, and terminates the temperature measurement mode when the determination is affirmed.
  • the functional configuration of the CPU 61 in the temperature measurement mode is described with an example in which the temperature of the subject is measured based on the first infrared light and the second infrared light by the two-color temperature measurement method.
  • the functional configuration of the CPU 61 in the temperature measurement mode when the temperature of the object is measured based on the second infrared light and the third infrared light is also the same as described above.
  • the dimming member 36 reduces the amount of the second near-infrared light out of the first near-infrared light and the second near-infrared light. Both light amounts of near-infrared light may be reduced. Similarly, the dimming member 36 may reduce the amount of both the second near-infrared light and the third near-infrared light.
  • step S51 the light source ON control unit 111 switches the light source 14 ON.
  • Light source 14 outputs illumination light IL when switched on.
  • step S52 the imaging control unit 114 causes the polarization image sensor 180 to capture an image.
  • step S ⁇ b>53 the display control unit 115 causes the display 76 to display the captured image obtained by being captured by the polarization image sensor 180 .
  • step S54 the termination determination unit 116 determines whether or not a condition for terminating the imaging mode (hereinafter referred to as "imaging mode termination condition") is satisfied.
  • a condition for terminating the imaging mode hereinafter referred to as "imaging mode termination condition”
  • An example of the imaging mode end condition is that the input device 78 has accepted an instruction to end the imaging mode.
  • the imaging mode termination condition is not satisfied, the determination is negative, and the process shown in FIG. 23 proceeds to step S52.
  • step S54 if the imaging mode end condition is satisfied, the determination is affirmative, and the process shown in FIG. 23 proceeds to step S55.
  • step S55 the light source off control unit 117 switches the light source 14 off.
  • Light source 14 stops outputting illumination light IL when switched off.
  • step S61 the wavelength selection unit 121 selects two wavelength bands, that is, the first wavelength band and the second wavelength band, to be used for the two-color thermometry method.
  • the first imaging control unit 123 causes the polarization image sensor 180 to capture an image.
  • the first digital image data is thus obtained.
  • step S ⁇ b>63 the dimming control unit 125 places a dimming member at a position where the dimming filter 93 corresponding to the second wavelength band selected by the wavelength selection unit 121 among the plurality of dimming filters 93 is inserted into the optical path. Slide 36.
  • step S64 the second imaging control unit 126 causes the polarization image sensor 180 to capture an image. Thereby, the second digital image data is obtained.
  • step S65 the temperature derivation unit 127 calculates the temperature distribution of the subject by two-color thermometry based on the first digital image data and the second digital image data.
  • step S66 the display control unit 128 generates temperature information based on the temperature distribution of the subject calculated by the temperature derivation unit 127, and superimposes the temperature information on the captured image obtained in the same manner as in the above imaging mode.
  • the display 76 displays the superimposed image.
  • step S67 the termination determination unit 129 determines whether or not a condition for termination of the temperature measurement mode (hereinafter referred to as "temperature measurement mode termination condition") is satisfied.
  • a condition for termination of the temperature measurement mode hereinafter referred to as "temperature measurement mode termination condition”
  • An example of the temperature measurement mode end condition is that the input device 78 has accepted an instruction to end the temperature measurement mode.
  • step S67 if the temperature measurement mode end condition is not satisfied, the determination is negative, and the process shown in step S67 proceeds to step S61.
  • step S67 if the conditions for ending the temperature measurement mode are satisfied, the determination is affirmative, and the processing shown in FIG. 24 ends.
  • the CPU 61 controls the position of focus by moving the focus lens 31 along the optical axis OA and adjusts the zoom magnification by moving the zoom lens 32 in each of the imaging mode and the temperature measurement mode. Control for adjustment is performed on the zoom drive mechanism 42 . Further, the CPU 61 controls the blur correction drive mechanism 44 to correct image blur by moving the blur correction lens 34 in each of the imaging mode and the temperature measurement mode. In addition, the CPU 61 controls the diaphragm drive mechanism 43 to adjust the amount of light passing through the diaphragm 33 by changing the diameter of the aperture 33A provided in the diaphragm 33 in each of the imaging mode and the temperature measurement mode. do. The CPU 61 also controls the adjustment drive mechanism 47 to adjust the focus position by moving the adjustment lens 37 in each of the imaging mode and the temperature measurement mode.
  • the polarizing filter unit 170 filters the first near-infrared light in the first wavelength band and the second near-infrared light in the second wavelength band out of the light incident on the polarizing filter unit 170 .
  • the light attenuating member 36 selectively transmits the second near-infrared light and reduces the amount of the second near-infrared light, thereby reducing the first radiance of the first near-infrared light and the second near-infrared light. Correct the ratio.
  • the polarization image sensor 180 receives the first near-infrared light and the second near-infrared light whose first radiance ratio is corrected by the dimming member 36, and receives the first near-infrared light and the second near-infrared light according to the irradiance of the first near-infrared light.
  • a second signal corresponding to the irradiance of the first signal and the second near-infrared light is output. Therefore, for example, compared to the case where the first radiance ratio of the first near-infrared light and the second near-infrared light is not corrected, the measurement accuracy when measuring the temperature of the subject by the two-color thermometry method is improved. can be made
  • the effect of the third embodiment is described with an example in which the temperature of the subject is measured based on the first infrared light and the second infrared light by the two-color thermometry method.
  • the effect of measuring the temperature of the object based on the second infrared light and the third infrared light is the same as above.
  • the polarizing filter unit 170 includes a first BPF 83A that transmits the first near-infrared light, a second BPF 83B that transmits the second near-infrared light, and a third BPF 83C that transmits the third near-infrared light.
  • the polarizing filter unit 170 has a first polarizing filter 173A, a second polarizing filter 173B, and a third polarizing filter 173C.
  • the first polarizing filter 173A transmits the first light component oscillating in the first direction of the first near-infrared light
  • the second polarizing filter 173B transmits the light component oscillating in the second direction of the second near-infrared light.
  • the oscillating second light component is transmitted
  • the third polarizing filter 173C transmits the third light component oscillating in the third direction in the third near-infrared light.
  • the polarization image sensor 180 has a plurality of first physical pixels 181A to which a first polarizing filter 183A corresponding to the first polarizing filter 173A is assigned, and a second polarizing filter 183B corresponding to the second polarizing filter 173B. and a plurality of third physical pixels 181C to which the third polarizing filters 183C corresponding to the third polarizing filters 173C are assigned. Therefore, for example, when the CPU 61 is in the imaging mode, the plurality of first physical pixels 181A, the plurality of second physical pixels 181B, and the plurality of third physical pixels 181C emit near-infrared light in a plurality of wavelength bands in parallel. image can be captured by
  • the configuration of the camera 1 is changed as follows from the first embodiment. Differences of the fourth embodiment from the first embodiment will be described below.
  • a shielding member 190 instead of the dimming member 36, the dimming driving mechanism 46, and the dimming driving circuit 56 in the first embodiment (see FIG. 11), a shielding member 190, A shield drive mechanism 196 and a shield drive circuit 206 are used.
  • the shield drive mechanism 196 and shield drive circuit 206 have the same configurations as the dimming drive mechanism 46 and dimming drive circuit 56 in the first embodiment.
  • the shielding member 190 includes a flat plate 91.
  • the flat plate 91 is provided with first holes 193A, second holes 193B, and third holes 193C at regular intervals along the longitudinal direction of the flat plate 91 .
  • the first hole 193A, the second hole 193B, and the third hole 193C will be referred to as holes 193 unless it is necessary to distinguish them.
  • the shielding member 190 is an optical element that adjusts the amount of light attenuation by switching the hole 193 inserted into the optical path among the plurality of holes 193 .
  • the shielding member 190 slides, for example, in the direction of the straight double arrow S shown in FIG.
  • the shielding member 190 has a position where it escapes from the optical path, a position where the first hole 193A is inserted into the optical path, a position where the second hole 193B is inserted into the optical path, and a position where the third hole 193C is inserted into the optical path. slide.
  • the shield member 190 is arranged at a position away from the optical path unless a slide command is output from the CPU 61 to the shield drive circuit 206 .
  • the first hole 193A, second hole 193B, and third hole 193C correspond to the second BPF 83B, third BPF 83C, and fourth BPF 83D, respectively.
  • the first hole 193A overlaps the second BPF 83B, and the peripheral portion of the first hole 193A functions as a shielding portion.
  • the amount of near-infrared light is reduced.
  • the third BPF 83C and the second hole 193B are inserted into the optical path, the second hole 193B overlaps with the third BPF 83C, and the peripheral portion of the second hole 193B functions as a shielding portion.
  • the amount of near-infrared light is reduced.
  • the third hole 193C overlaps with the fourth BPF 83D, and the peripheral portion of the third hole 193C functions as a shielding portion. The amount of near-infrared light is reduced.
  • the diameters of the first hole 193A, the second hole 193B, and the third hole 193C are set to be smaller in order of the first hole 193A, the second hole 193B, and the third hole 193C.
  • the second hole 193B, and the third hole 193C the amount of light passing therethrough decreases in the order of the first hole 193A, the second hole 193B, and the third hole 193C.
  • the shielding member 190 is an example of a “second optical element” and a “shielding member that shields part of the second light” according to the technology of the present disclosure.
  • the radiance ratio (hereinafter referred to as the first radiance ratio ) is set to a dimming amount equal to a predetermined radiance ratio (hereinafter referred to as a first predetermined radiance ratio) for the first near-infrared light and the second near-infrared light.
  • the radiance ratio (hereinafter referred to as the second radiance ratio ) is set to a dimming amount equal to a predetermined radiance ratio (hereinafter referred to as a second predetermined radiance ratio) for the second near-infrared light and the third near-infrared light.
  • the radiance ratio (hereinafter referred to as the third radiance ratio ) is set to a dimming amount equal to a predetermined radiance ratio (hereinafter referred to as a third predetermined radiance ratio) for the third near-infrared light and the fourth near-infrared light.
  • the first radiance ratio, the first predetermined radiance ratio, the second radiance ratio, the second predetermined radiance ratio, the third radiance ratio, and the third predetermined radiance ratio, and the first hole 193A are the optical paths.
  • the amount of light attenuation when the second hole 193B is inserted in the optical path and the amount of light attenuation when the third hole 193C is inserted in the optical path.
  • the amount of light attenuation when the first hole 193A is inserted into the optical path will be described with reference to FIG.
  • a thermal light source for example, a halogen lamp, etc.
  • the InGaAs diode As shown on the left side of FIG. 26, the first near-infrared light emitted from a thermal light source (for example, a halogen lamp, etc.) having a known spectral distribution and transmitted through the first BPF 83A is received by the InGaAs diode, and the InGaAs A first signal is output from the diode.
  • a thermal light source for example, a halogen lamp, etc.
  • the second near-infrared light emitted from the thermal light source, transmitted through the second BPF 83B, and passed through the first hole 193A is received by the same InGaAs diode as described above, whereby the InGaAs diode 2 signals are output.
  • the first radiance ratio corresponds to the ratio between the value of the first signal output from the InGaAs diode and the value of the second signal output from the InGaAs diode.
  • the first predetermined radiance ratio corresponds to the radiance ratio of the first near-infrared light and the second near-infrared light calculated from the known spectral distribution of the heat light source.
  • the amount of light attenuation when the first hole 193A is inserted into the optical path is set to the amount of light attenuation that makes the first radiance ratio equal to the first predetermined radiance ratio.
  • the amount of light attenuation when the second hole 193B is inserted into the optical path will be described.
  • the second near-infrared light emitted from the thermal light source and transmitted through the second BPF 83B is received by the InGaAs diode, whereby the InGaAs diode outputs a second signal.
  • the third near-infrared light emitted from the thermal light source, transmitted through the third BPF 83C, and passed through the second hole 193B is received by the same InGaAs diode as described above, whereby the InGaAs diode 3 signals are output.
  • the second radiance ratio corresponds to the ratio between the value of the second signal output from the InGaAs diode and the value of the third signal output from the InGaAs diode.
  • the second predetermined radiance ratio corresponds to the radiance ratio of the second near-infrared light and the third near-infrared light calculated from the known spectral distribution of the heat light source.
  • the amount of light attenuation when the second hole 193B is inserted into the optical path is set to the amount of light attenuation that makes the second radiance ratio equal to the second predetermined radiance ratio.
  • the amount of light attenuation when the third hole 193C is inserted into the optical path will be described.
  • the third near-infrared light emitted from the thermal light source and transmitted through the third BPF 83C is received by the same InGaAs diode as described above, thereby outputting a third signal from the InGaAs diode.
  • the fourth near-infrared light emitted from the thermal light source, transmitted through the fourth BPF 83D, and passed through the third hole 193C is received by the same InGaAs diode as described above, whereby the InGaAs diode 4 signals are output.
  • the third radiance ratio corresponds to the ratio between the value of the third signal output from the InGaAs diode and the value of the fourth signal output from the InGaAs diode.
  • the third predetermined radiance ratio corresponds to the radiance ratio of the third near-infrared light and the fourth near-infrared light calculated from the known spectral distribution of the heat light source.
  • the amount of light attenuation when the third hole 193C is inserted into the optical path is set to the amount of light attenuation that makes the third radiance ratio equal to the third predetermined radiance ratio.
  • the CPU 61 controls the wavelength selection unit 112, the first turret control unit 122, the first imaging control unit 123, the second turret control unit 124, the shielding control unit 211, the second It functions as an imaging control unit 126 , a temperature derivation unit 127 , a display control unit 128 and an end determination unit 129 .
  • the functional configuration of the CPU 61 in the imaging mode is the same as in the first embodiment.
  • the wavelength selection unit 121 selects two wavelength bands, that is, the first wavelength band and the second wavelength band, to be used for the two-color thermometry method.
  • the wavelength selection unit 121 uses a first near-infrared light wavelength band from 950 nm to 1100 nm, a second near-infrared light wavelength band from 1150 nm to 1350 nm, and a wavelength band from 1500 nm to Two wavelength bands are selected from the third near-infrared wavelength band of 1750 nm and the fourth near-infrared wavelength band of 2000 nm to 2400 nm.
  • the method by which the wavelength selector 121 selects two wavelength bands is the same as in the first embodiment.
  • the wavelength selection unit 121 selects the wavelength band of the second infrared light as the first wavelength band and selects the wavelength band of the third infrared light as the second wavelength band will be taken as an example.
  • the first turret control unit 122, the first imaging control unit 123, the second turret control unit 124, the shielding control unit 211, the second imaging control unit 126, and the temperature derivation unit 127 will be described.
  • the second near-infrared light is an example of the "first light” according to the technology of the present disclosure
  • the third near-infrared light is an example of the "second light” according to the technology of the present disclosure. be.
  • the first turret control unit 122 outputs a rotation command to the turret drive circuit 55 to insert the second BPF 83B corresponding to the wavelength band of the second near-infrared light into the optical path.
  • the turret drive circuit 55 drives the turret drive mechanism 45 to rotate the turret filter 35 to the position where the second BPF 83B is inserted into the optical path.
  • the second BPF 83B is inserted into the optical path, the second near-infrared light transmitted through the second BPF 83B forms an image on the light receiving surface of the image sensor 15.
  • the first imaging control section 123 outputs an imaging command to the image sensor driver 71 .
  • the image sensor driver 71 makes the image sensor 15 image a 2nd near-infrared light, if an imaging command is received.
  • the image sensor 15 captures the second near-infrared light, it outputs first analog image data, and the signal processing circuit 72 performs various signal processing on the first analog image data to obtain a first digital image. Generate and output data.
  • the second turret control unit 124 outputs to the turret drive circuit 55 a rotation command for inserting the third BPF 83C corresponding to the wavelength band of the third near-infrared light into the optical path.
  • the turret drive circuit 55 drives the turret drive mechanism 45 to rotate the turret filter 35 to the position where the second BPF 83B is inserted into the optical path.
  • the shielding control unit 211 outputs to the shielding driving circuit 206 a slide command for inserting the second hole 193B corresponding to the third BPF 83C into the optical path.
  • the shield drive circuit 206 drives the shield drive mechanism 196 to slide the shield member 190 to the position where the second hole 193B is inserted into the optical path.
  • the second hole 193B overlaps with the third BPF 83C, and the third near-infrared light transmitted through the third BPF 83C is blocked by the peripheral portion of the second hole 193B, thereby being attenuated. be.
  • the second imaging control unit 126 outputs imaging commands to the image sensor driver 71 .
  • the image sensor driver 71 makes the image sensor 15 image the 3rd near-infrared light, if an imaging command is received.
  • the image sensor 15 captures the third near-infrared light, it outputs second analog image data, and the signal processing circuit 72 performs various signal processing on the second analog image data to obtain a second digital image. Generate and output data.
  • the temperature derivation unit 127 calculates the temperature distribution of the subject by two-color thermometry based on the first digital image data and the second digital image data.
  • the method by which the temperature derivation unit 127 calculates the temperature distribution of the subject is the same as in the first embodiment.
  • the display control unit 128 generates temperature information based on the temperature distribution of the subject calculated by the temperature deriving unit 127, and superimposes the temperature information on the captured image obtained in the same manner as in the above-described imaging mode. is displayed on the display 76 with respect to the display control circuit 77 .
  • the termination determination unit 129 determines whether to terminate the temperature measurement mode. The termination determination unit 129 continues the temperature measurement mode when the determination is negative, and terminates the temperature measurement mode when the determination is affirmed.
  • the functional configuration of the CPU 61 in the temperature measurement mode is described using an example in which the temperature of the subject is measured based on the second infrared light and the third infrared light by the two-color temperature measurement method. is the temperature when the temperature of the subject is measured based on the first infrared light and the second infrared light, and when the temperature of the subject is measured based on the third infrared light and the fourth infrared light.
  • the functional configuration of the CPU 61 in the measurement mode is also the same as described above.
  • the shielding member 190 reduces the amount of the third near-infrared light out of the second near-infrared light and the third near-infrared light. You may reduce the light quantity of both infrared rays. Similarly, the light amount of both the first near-infrared light and the second near-infrared light may be reduced by the shielding member 190, and the light amount of both the third near-infrared light and the fourth near-infrared light may be reduced. may be decreased.
  • the imaging process performed by the CPU 61 when the imaging support process is executed by the CPU 61 and the CPU 61 enters the imaging mode is the same as in the first embodiment.
  • An example of the flow of temperature measurement processing performed by the CPU 61 when the CPU 61 enters the temperature measurement mode as a result of execution of the imaging support processing by the CPU 61 will be described below with reference to FIG.
  • step S71 the wavelength selection unit 121 selects two wavelength bands, that is, a first wavelength band and a second wavelength band, to be used for dichroic thermometry.
  • step S72 the first turret control unit 122 rotates the turret filter 35 to a position where the BPF 83 corresponding to the first wavelength band selected by the wavelength selection unit 112 among the plurality of BPFs 83 is inserted into the optical path.
  • the first imaging control unit 123 causes the image sensor 15 to capture an image.
  • the first digital image data is thus obtained.
  • step S74 the second turret control unit 124 rotates the turret filter 35 to a position where the BPF 83 corresponding to the second wavelength band selected by the wavelength selection unit 121 among the plurality of BPFs 83 is inserted into the optical path.
  • step S75 the shielding control unit 211 slides the shielding member 190 to a position where the hole 193 corresponding to the BPF 83 inserted into the optical path is inserted into the optical path among the plurality of holes 193 .
  • the second imaging control unit 126 causes the image sensor 15 to capture an image. Thereby, the second digital image data is obtained.
  • step S77 the temperature deriving unit 127 calculates the temperature distribution of the subject by two-color thermometry based on the first digital image data and the second digital image data.
  • step S78 the display control unit 128 generates temperature information based on the temperature distribution of the subject calculated by the temperature deriving unit 127, and superimposes the temperature information on the captured image obtained in the same manner as in the above imaging mode.
  • the display 76 displays the superimposed image.
  • step S79 the termination determination unit 129 determines whether or not a condition for termination of the temperature measurement mode (hereinafter referred to as "temperature measurement mode termination condition") is satisfied.
  • a condition for termination of the temperature measurement mode hereinafter referred to as "temperature measurement mode termination condition”
  • An example of the temperature measurement mode end condition is that the input device 78 has accepted an instruction to end the temperature measurement mode.
  • step S79 if the temperature measurement mode end condition is not satisfied, the determination is negative, and the process shown in step S79 proceeds to step S71.
  • step S79 if the conditions for ending the temperature measurement mode are satisfied, the determination is affirmative, and the processing shown in FIG. 29 ends.
  • the CPU 61 controls the position of focus by moving the focus lens 31 along the optical axis OA and adjusts the zoom magnification by moving the zoom lens 32 in each of the imaging mode and the temperature measurement mode. Control for adjustment is performed on the zoom drive mechanism 42 . Further, the CPU 61 controls the blur correction drive mechanism 44 to correct image blur by moving the blur correction lens 34 in each of the imaging mode and the temperature measurement mode. In addition, the CPU 61 controls the diaphragm drive mechanism 43 to adjust the amount of light passing through the diaphragm 33 by changing the diameter of the aperture 33A provided in the diaphragm 33 in each of the imaging mode and the temperature measurement mode. do. The CPU 61 also controls the adjustment drive mechanism 47 to adjust the focus position by moving the adjustment lens 37 in each of the imaging mode and the temperature measurement mode.
  • the turret filter 35 filters the second near-infrared light in the second wavelength band and the third near-infrared light in the third wavelength band from the light incident on the turret filter 35 .
  • the shielding member 190 reduces the amount of the third near-infrared light, thereby correcting the second radiance ratio of the second near-infrared light and the third near-infrared light. do.
  • the image sensor 15 receives the second near-infrared light and the third near-infrared light whose second radiance ratio is corrected by the dimming member 36, and responds to the irradiance of the second near-infrared light.
  • a third signal corresponding to the irradiance of the second signal and the third near-infrared light is output. Therefore, for example, compared to the case where the second radiance ratio of the second near-infrared light and the third near-infrared light is not corrected, the measurement accuracy when measuring the temperature of the subject by the two-color thermometry method is improved. can be made
  • the effect of the fourth embodiment is described with an example in which the temperature of the subject is measured based on the second infrared light and the third infrared light by the two-color thermometry method.
  • the effects are the same as above. It is the same.
  • the shielding member 190 has a first hole 193A, a second hole 193B, and a third hole 193C.
  • the peripheral portion of the first hole 193A shields part of the second near-infrared light transmitted through the second BPF 83B, and the peripheral portion of the second hole 193B partially blocks the third near-infrared light transmitted through the third BPF 83C.
  • the peripheral portion of the third hole 193C partially shields the fourth near-infrared light transmitted through the fourth BPF 83D.
  • the first near-infrared light and the second near-infrared light can be corrected for the first radiance ratio of
  • the second near-infrared light and the third near-infrared light A second radiance ratio of the light can be corrected.
  • the third near-infrared light and the fourth near-infrared light can be corrected for the third radiance ratio of
  • the configuration of the camera 1 is changed as follows from the first embodiment. Differences of the fifth embodiment from the first embodiment will be described below.
  • the dimming member 36, the dimming driving mechanism 46, and the dimming driving circuit 56 in the first embodiment are omitted, and instead Furthermore, in the temperature measurement mode, the CPU 61 controls the wavelength selection section 121, the first turret control section 122, the first imaging control section 123, the second turret control section 124, the second imaging control section 126, the aperture amount deriving section 221, the aperture It functions as a control unit 222 , a third imaging control unit 223 , a temperature derivation unit 127 , a display control unit 128 and an end determination unit 129 . In addition, in the fifth embodiment, the functional configuration of the CPU 61 in the imaging mode is the same as in the first embodiment.
  • the wavelength selection unit 121 selects two wavelength bands, that is, the first wavelength band and the second wavelength band, to be used for the two-color thermometry method.
  • the wavelength selection unit 121 uses a first near-infrared light wavelength band from 950 nm to 1100 nm, a second near-infrared light wavelength band from 1150 nm to 1350 nm, and a wavelength band from 1500 nm to Two wavelength bands are selected from the third near-infrared wavelength band of 1750 nm and the fourth near-infrared wavelength band of 2000 nm to 2400 nm.
  • the method by which the wavelength selector 121 selects two wavelength bands is the same as in the first embodiment.
  • the wavelength selection unit 121 selects the wavelength band of the second infrared light as the first wavelength band and selects the wavelength band of the third infrared light as the second wavelength band will be taken as an example.
  • first turret control unit 122, first imaging control unit 123, second turret control unit 124, second imaging control unit 126, aperture amount derivation unit 221, aperture control unit 222, third imaging control unit 223, and temperature derivation The configuration of the unit 127 will be described.
  • the second near-infrared light is an example of the "first light” according to the technology of the present disclosure
  • the third near-infrared light is an example of the "second light” according to the technology of the present disclosure. be.
  • the first turret control unit 122 outputs a rotation command to the turret drive circuit 55 to insert the second BPF 83B corresponding to the wavelength band of the second near-infrared light into the optical path.
  • the turret drive circuit 55 drives the turret drive mechanism 45 to rotate the turret filter 35 to the position where the second BPF 83B is inserted into the optical path.
  • the second BPF 83B is inserted into the optical path, the second near-infrared light transmitted through the second BPF 83B forms an image on the light receiving surface of the image sensor 15.
  • the first imaging control section 123 outputs an imaging command to the image sensor driver 71 .
  • the image sensor driver 71 makes the image sensor 15 image a 2nd near-infrared light, if an imaging command is received.
  • the image sensor 15 captures the second near-infrared light, it outputs first analog image data, and the signal processing circuit 72 performs various signal processing on the first analog image data to obtain a first digital image. Generate and output data.
  • the second turret control unit 124 outputs to the turret drive circuit 55 a rotation command for inserting the third BPF 83C corresponding to the wavelength band of the third near-infrared light into the optical path.
  • the turret drive circuit 55 drives the turret drive mechanism 45 to rotate the turret filter 35 to the position where the third BPF 83C is inserted into the optical path.
  • the second imaging control unit 126 outputs imaging commands to the image sensor driver 71 .
  • the image sensor driver 71 makes the image sensor 15 image the 3rd near-infrared light, if an imaging command is received.
  • the image sensor 15 captures the third near-infrared light, it outputs second analog image data, and the signal processing circuit 72 performs various signal processing on the second analog image data to obtain a second digital image. Generate and output data.
  • the diaphragm amount derivation unit 221 derives the diaphragm amount based on the first digital image data and the second digital image data. Specifically, the aperture amount derivation unit 221 causes the second near-infrared light that passes through the aperture 33 and passes through the second BPF 83B to enter the image sensor 15 when the image sensor 15 performs imaging by the first imaging control unit 123 .
  • the radiance ratio between the outside light and the third near-infrared light that passes through the diaphragm 33, passes through the third BPF 83C, and enters the image sensor 15 when the image sensor 15 performs imaging by the second imaging control unit 126 is , a diaphragm amount equal to a predetermined radiance ratio (hereinafter referred to as a predetermined radiance ratio) for the second near-infrared light and the third near-infrared light.
  • the diaphragm amount is defined by the diameter of the aperture 33A provided in the diaphragm 33.
  • the diaphragm amount derivation unit 221 receives the second near-infrared light that has passed through the diaphragm 33 and passed through the second BPF 83B by the InGaAs diode, so that the value of the second signal output from the InGaAs diode , the third near-infrared light that has passed through the diaphragm 33 and passed through the third BPF 83C is received by the same InGaAs diode as above, so that the ratio of the value of the third signal output from the InGaAs diode (hereinafter referred to as the signal value ratio ) is calculated.
  • the signal value ratio corresponds to the radiance ratio of the second near-infrared light and the third near-infrared light.
  • the aperture amount derivation unit 221 calculates the predetermined radiance ratio between the second near-infrared light and the third near-infrared light calculated in advance from the known spectral distribution of the thermal light source (for example, a halogen lamp), and the above-mentioned are compared, and the aperture amount that makes the radiance ratio corresponding to the signal value ratio equal to the predetermined radiance ratio is derived.
  • the aperture amount may be derived by being calculated based on a formula, or may be derived by being extracted from a predetermined table.
  • the diaphragm control unit 222 outputs a diaphragm command corresponding to the diaphragm amount derived by the diaphragm amount deriving unit 221 to the diaphragm drive circuit 53 .
  • the aperture drive circuit 53 drives the aperture drive mechanism 43 to change the diameter of the aperture 33A provided in the aperture 33 to the aperture corresponding to the aperture command.
  • the third near-infrared light passing through the diaphragm 33 and passing through the third BPF 83C is attenuated, and the second near-infrared light passing through the diaphragm 33 and passing through the second BPF 83B passes through the diaphragm 33 and passes through the third BPF 83C.
  • the radiance ratio with the transmitted third near-infrared light is corrected.
  • the diaphragm 33 is an example of a "second optical element" according to the technology of the present disclosure.
  • the CPU 61 that functions as the aperture control unit 222 is an example of the "second processor” according to the technology of the present disclosure, and the aperture drive mechanism 43 is an example of an "actuator that adjusts the amount of light reduction by the second optical element".
  • the third imaging control section 223 outputs an imaging command to the image sensor driver 71 .
  • the image sensor driver 71 makes the image sensor 15 image the 3rd near-infrared light, if an imaging command is received.
  • the image sensor 15 captures the third near-infrared light, it outputs third analog image data, and the signal processing circuit 72 performs various signal processing on the third analog image data to obtain a third digital image. Generate and output data.
  • the temperature derivation unit 127 calculates the temperature distribution of the subject by two-color thermometry based on the first digital image data and the third digital image data.
  • the method by which the temperature derivation unit 127 calculates the temperature distribution of the subject is the same as in the first embodiment.
  • the display control unit 128 generates temperature information based on the temperature distribution of the subject calculated by the temperature deriving unit 127, and superimposes the temperature information on the captured image obtained in the same manner as in the above-described imaging mode. is displayed on the display 76 with respect to the display control circuit 77 .
  • the termination determination unit 129 determines whether to terminate the temperature measurement mode. The termination determination unit 129 continues the temperature measurement mode when the determination is negative, and terminates the temperature measurement mode when the determination is affirmed.
  • the functional configuration of the CPU 61 in the temperature measurement mode is described using an example in which the temperature of the subject is measured based on the second infrared light and the third infrared light by the two-color temperature measurement method. is the temperature when the temperature of the subject is measured based on the first infrared light and the second infrared light, and when the temperature of the subject is measured based on the third infrared light and the fourth infrared light.
  • the functional configuration of the CPU 61 in the measurement mode is also the same as described above.
  • the diaphragm 33 reduces the amount of the third near-infrared light out of the second near-infrared light and the third near-infrared light. You may reduce the light quantity of both external light. Similarly, the diaphragm 33 may reduce the light amount of both the first near-infrared light and the second near-infrared light, and reduce the light amount of both the third near-infrared light and the fourth near-infrared light. You may let
  • the imaging process performed by the CPU 61 when the imaging support process is executed by the CPU 61 and the CPU 61 enters the imaging mode is the same as in the first embodiment.
  • An example of the flow of temperature measurement processing performed by the CPU 61 when the CPU 61 enters the temperature measurement mode as a result of execution of the imaging support processing by the CPU 61 will be described below with reference to FIG.
  • step S81 the wavelength selection unit 121 selects two wavelength bands, that is, the first wavelength band and the second wavelength band, to be used for dichroic thermometry.
  • step S82 the first turret control unit 122 rotates the turret filter 35 to a position where the BPF 83 corresponding to the first wavelength band selected by the wavelength selection unit 121 among the plurality of BPFs 83 is inserted into the optical path.
  • the first imaging control unit 123 causes the image sensor 15 to capture an image.
  • the first digital image data is thus obtained.
  • step S84 the second turret control unit 124 rotates the turret filter 35 to a position where, among the plurality of BPFs 83, the BPF 83 corresponding to the second wavelength band selected by the wavelength selection unit 121 is inserted into the optical path.
  • the first imaging control unit 123 causes the image sensor 15 to capture an image. Thereby, the second digital image data is obtained.
  • the aperture amount deriving unit 221 derives the aperture amount based on the first digital image data and the second digital image data. Specifically, the aperture amount derivation unit 221 allows near-infrared light that passes through the aperture 33 and the BPF 83 to enter the image sensor 15 when an image is captured by the image sensor 15 by the first imaging control unit 123 . , and the near-infrared light that passes through the aperture 33 and passes through the BPF 83 and enters the image sensor 15 when the image sensor 15 performs imaging by the second imaging control unit 126.
  • the near-infrared light Derive an aperture equal to the predetermined radiance ratio defined for .
  • step S87 the diaphragm control unit 222 sets the diaphragm amount by the diaphragm 33 to the diaphragm amount derived by the diaphragm amount deriving unit 221.
  • the third imaging control unit 223 causes the image sensor 15 to capture an image. Thereby, the third digital image data is obtained.
  • step S89 the temperature derivation unit 127 calculates the temperature distribution of the subject by two-color thermometry based on the first digital image data and the third digital image data.
  • step S90 the display control unit 128 generates temperature information based on the temperature distribution of the object calculated by the temperature derivation unit 127, and superimposes the temperature information on the captured image obtained in the same manner as in the above imaging mode.
  • the display 76 displays the superimposed image.
  • step S91 the termination determination unit 129 determines whether or not a condition for terminating the temperature measurement mode (hereinafter referred to as "temperature measurement mode termination condition") is satisfied.
  • a condition for terminating the temperature measurement mode hereinafter referred to as "temperature measurement mode termination condition”
  • An example of the temperature measurement mode end condition is that the input device 78 has accepted an instruction to end the temperature measurement mode.
  • step S91 if the temperature measurement mode end condition is not satisfied, the determination is negative, and the process shown in step S91 proceeds to step S81.
  • step S91 if the condition for ending the temperature measurement mode is satisfied, the determination is affirmative, and the processing shown in FIG. 31 ends.
  • the CPU 61 controls the position of focus by moving the focus lens 31 along the optical axis OA and adjusts the zoom magnification by moving the zoom lens 32 in each of the imaging mode and the temperature measurement mode. Control for adjustment is performed on the zoom drive mechanism 42 . Further, the CPU 61 controls the blur correction drive mechanism 44 to correct image blur by moving the blur correction lens 34 in each of the imaging mode and the temperature measurement mode. In addition, the CPU 61 controls the diaphragm drive mechanism 43 to adjust the amount of light passing through the diaphragm 33 by changing the diameter of the aperture 33A provided in the diaphragm 33 in each of the imaging mode and the temperature measurement mode. do. The CPU 61 also controls the adjustment drive mechanism 47 to adjust the focus position by moving the adjustment lens 37 in each of the imaging mode and the temperature measurement mode.
  • the turret filter 35 filters the second near-infrared light in the second wavelength band and the third near-infrared light in the third wavelength band from the light incident on the turret filter 35 .
  • the diaphragm 33 reduces the amount of the third near-infrared light, thereby correcting the radiance ratio between the second near-infrared light and the third near-infrared light.
  • the image sensor 15 receives the second near-infrared light and the third near-infrared light whose radiance ratio is corrected by the diaphragm 33, and receives the second signal and the third near-infrared light according to the irradiance of the second near-infrared light.
  • a third signal corresponding to the irradiance of the third near-infrared light is output. Therefore, for example, compared to the case where the radiance ratio of the second near-infrared light and the third near-infrared light is not corrected, the measurement accuracy when measuring the temperature of the subject by the two-color thermometry method can be improved. can be done.
  • the effect of the fifth embodiment is described by taking an example in which the temperature of the subject is measured based on the second infrared light and the third infrared light by the two-color thermometry method.
  • the temperature of the subject is measured based on the first infrared light and the second infrared light
  • the temperature of the subject is measured based on the third infrared light and the fourth infrared light
  • the effects are the same as above. It is the same.
  • the aperture drive mechanism 43 adjusts the amount of light attenuation by the aperture 33, and the CPU 61 determines the amount The aperture driving mechanism 43 is controlled to adjust the dimming amount. Thereby, the radiance ratio can be corrected to the predetermined radiance ratio.
  • the diaphragm 33 having the aperture 33A whose diameter is variable is used to adjust the amount of light attenuation, the number of members can be reduced as compared with the case where the light attenuation member 36 or the like is used, for example. can do.
  • the first optical element is an optical element that selectively transmits the first light in the first wavelength band and the second light in the second wavelength band among the incident light. If so, it may be other than the optical elements described in the above-described first to fifth embodiments.
  • the second optical element reduces the amount of at least the second light out of the first light and the second light, thereby reducing the emission of the first light and the second light.
  • Any optical element other than the optical elements described in the first to fifth embodiments may be used as long as the optical element corrects the luminance ratio.
  • the senor receives the first light and the second light whose radiance ratio is corrected by the second optical element, and receives the first light according to the irradiance of the first light.
  • Any sensor other than the image sensor described in the first to fifth embodiments may be used as long as it outputs a signal and a second signal corresponding to the irradiance of the second light.
  • the techniques in the first to fifth embodiments may be applied to optical devices such as measuring devices that do not have imaging functions, other than cameras.
  • the optical device may be an optical device for purposes other than measurement.
  • image blur is corrected by moving the blur correction lens 34.
  • an image sensor is moved as an example of the "optical element" according to the technology of the present disclosure.
  • Image blur may be corrected by allowing Image blurring may also be corrected by an image processing technique based on a plurality of captured images.
  • the wavelength band from 950 nm to 1100 nm, the wavelength band from 1150 nm to 1350 nm, the wavelength band from 1500 nm to 1750 nm, and the wavelength from 200 nm to 2400 nm Two wavelength bands are selected from the bands, but two wavelength bands may be selected from other wavelength bands.
  • near-infrared light is used in the temperature measurement by the two-color thermometry method, but light other than near-infrared light such as visible light may be used. .
  • the technique of correcting the radiance ratio using the shielding member 190 in the fourth embodiment may be applied to the first to third embodiments.
  • the technique of correcting the radiance ratio using the diaphragm 33 in the fifth embodiment may be applied to the first to fourth embodiments.
  • techniques that can be combined may be appropriately combined.
  • the imaging support processing may be executed by a computer 314 in an external device 312 communicably connected to the camera 1 via a network 310 such as LAN or WAN.
  • computer 314 comprises CPU 316 , storage 318 and memory 320 .
  • the storage 318 stores the imaging support processing program 100 .
  • the camera 1 requests execution of imaging support processing from the external device 312 via the network 310 .
  • the CPU 316 of the external device 312 reads the imaging support processing program 100 from the storage 318 and executes the imaging support processing program 100 on the memory 320 .
  • the CPU 316 performs imaging support processing according to the imaging support processing program 100 executed on the memory 320 .
  • the CPU 316 provides the camera 1 via the network 310 with the processing result obtained by executing the imaging support processing.
  • the camera 1 and the external device 312 may perform the imaging support processing in a distributed manner, or a plurality of devices including the camera 1 and the external device 312 may perform the imaging support processing in a distributed manner.
  • the camera 1 and the external device 312 are examples of the “imaging device” according to the technology of the present disclosure.
  • the NVM 62 stores the imaging support processing program 100, but the technique of the present disclosure is not limited to this.
  • the imaging support processing program 100 may be stored in the storage medium 330.
  • FIG. Storage medium 330 is a non-temporary storage medium.
  • An example of the storage medium 330 includes any portable storage medium such as an SSD or USB memory.
  • the imaging support processing program 100 stored in the storage medium 330 is installed in the computer 60 .
  • the CPU 61 executes imaging support processing according to the imaging support processing program 100 .
  • the imaging support processing program 100 is stored in a storage unit such as another computer or server device connected to the computer 60 via a communication network (not shown), and the imaging support processing program is executed in response to a request from the camera 1. 100 may be downloaded and installed on computer 60 .
  • a storage unit such as a server device, or the NVM 62, and a part of the imaging support processing program 100 may be stored. You can leave it.
  • FIG. 33 shows a mode example in which the computer 60 is built in the camera 1, the technology of the present disclosure is not limited to this. may be made available.
  • the CPU 61 is a single CPU, but may be a plurality of CPUs. Also, a GPU may be applied instead of the CPU 61 .
  • the computer 60 is illustrated in the example shown in FIG. 33 , the technology of the present disclosure is not limited to this, and a device including ASIC, FPGA, and/or PLD is applied instead of the computer 60. good too. Also, instead of the computer 60, a combination of hardware configuration and software configuration may be used.
  • processors shown below can be used as hardware resources for executing the imaging support processing described in the first to fifth embodiments.
  • a processor for example, there is a CPU, which is a general-purpose processor that functions as a hardware resource that executes imaging support processing by executing software, that is, a program.
  • processors include, for example, FPGAs, PLDs, ASICs, and other dedicated electric circuits that are processors having circuit configurations specially designed to execute specific processing.
  • a memory is built in or connected to each processor, and each processor uses the memory to execute imaging support processing.
  • the hardware resource that executes the imaging support processing may be configured with one of these various processors, or a combination of two or more processors of the same or different types (for example, a combination of multiple FPGAs, or (combination of CPU and FPGA). Also, the hardware resource for executing the imaging support process may be one processor.
  • one processor is configured by combining one or more CPUs and software, and this processor functions as a hardware resource for executing imaging support processing.
  • this processor functions as a hardware resource for executing imaging support processing.
  • SoC SoC
  • a and/or B is synonymous with “at least one of A and B.” That is, “A and/or B” means that only A, only B, or a combination of A and B may be used. Also, in this specification, when three or more matters are expressed by connecting with “and/or”, the same idea as “A and/or B" is applied.

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS525667Y1 (https=) * 1970-09-19 1977-02-05
JPS53138776A (en) * 1977-05-10 1978-12-04 Toshiba Corp Color temperature measuring device
JP2012247381A (ja) * 2011-05-31 2012-12-13 Ihi Corp 溶接部の温度測定装置
WO2014020791A1 (ja) * 2012-08-02 2014-02-06 パナソニック株式会社 偏光カラー撮像装置
JP2014095664A (ja) * 2012-11-12 2014-05-22 Mitsubishi Heavy Ind Ltd 温度検出方法、温度検出装置およびプログラム
JP2018072050A (ja) * 2016-10-25 2018-05-10 株式会社Ihi 放射温度計測装置、放射温度計測方法
JP2019020370A (ja) * 2017-07-21 2019-02-07 新日鐵住金株式会社 温度測定装置、温度測定方法及びプログラム
WO2020044803A1 (ja) * 2018-08-30 2020-03-05 富士フイルム株式会社 撮像装置、撮像方法、及びプログラム
WO2021172284A1 (ja) * 2020-02-28 2021-09-02 富士フイルム株式会社 撮像装置及び方法

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004085391A (ja) * 2002-08-27 2004-03-18 Fujitsu Ltd 温度計測システム及び温度計測方法

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS525667Y1 (https=) * 1970-09-19 1977-02-05
JPS53138776A (en) * 1977-05-10 1978-12-04 Toshiba Corp Color temperature measuring device
JP2012247381A (ja) * 2011-05-31 2012-12-13 Ihi Corp 溶接部の温度測定装置
WO2014020791A1 (ja) * 2012-08-02 2014-02-06 パナソニック株式会社 偏光カラー撮像装置
JP2014095664A (ja) * 2012-11-12 2014-05-22 Mitsubishi Heavy Ind Ltd 温度検出方法、温度検出装置およびプログラム
JP2018072050A (ja) * 2016-10-25 2018-05-10 株式会社Ihi 放射温度計測装置、放射温度計測方法
JP2019020370A (ja) * 2017-07-21 2019-02-07 新日鐵住金株式会社 温度測定装置、温度測定方法及びプログラム
WO2020044803A1 (ja) * 2018-08-30 2020-03-05 富士フイルム株式会社 撮像装置、撮像方法、及びプログラム
WO2021172284A1 (ja) * 2020-02-28 2021-09-02 富士フイルム株式会社 撮像装置及び方法

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