WO2023057635A1 - Dispositif d'imagerie infrarouge - Google Patents
Dispositif d'imagerie infrarouge Download PDFInfo
- Publication number
- WO2023057635A1 WO2023057635A1 PCT/EP2022/077974 EP2022077974W WO2023057635A1 WO 2023057635 A1 WO2023057635 A1 WO 2023057635A1 EP 2022077974 W EP2022077974 W EP 2022077974W WO 2023057635 A1 WO2023057635 A1 WO 2023057635A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- facet
- infrared
- camera
- prism
- transparent
- Prior art date
Links
- 238000003331 infrared imaging Methods 0.000 title claims abstract description 31
- 230000003287 optical effect Effects 0.000 claims abstract description 64
- 230000005855 radiation Effects 0.000 claims abstract description 46
- 230000003595 spectral effect Effects 0.000 claims abstract description 36
- 238000010586 diagram Methods 0.000 claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims description 23
- 238000000576 coating method Methods 0.000 claims description 23
- 230000004075 alteration Effects 0.000 claims description 5
- 239000006185 dispersion Substances 0.000 claims description 4
- 230000001788 irregular Effects 0.000 claims description 4
- 239000006117 anti-reflective coating Substances 0.000 claims 1
- 239000000463 material Substances 0.000 description 16
- 239000011159 matrix material Substances 0.000 description 16
- 230000004907 flux Effects 0.000 description 15
- 230000003071 parasitic effect Effects 0.000 description 12
- 210000001747 pupil Anatomy 0.000 description 9
- PFNQVRZLDWYSCW-UHFFFAOYSA-N (fluoren-9-ylideneamino) n-naphthalen-1-ylcarbamate Chemical compound C12=CC=CC=C2C2=CC=CC=C2C1=NOC(=O)NC1=CC=CC2=CC=CC=C12 PFNQVRZLDWYSCW-UHFFFAOYSA-N 0.000 description 6
- 239000005083 Zinc sulfide Substances 0.000 description 6
- 230000008901 benefit Effects 0.000 description 6
- 210000000887 face Anatomy 0.000 description 6
- 230000002745 absorbent Effects 0.000 description 4
- 239000002250 absorbent Substances 0.000 description 4
- 238000003384 imaging method Methods 0.000 description 4
- 229910016036 BaF 2 Inorganic materials 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- OYLGJCQECKOTOL-UHFFFAOYSA-L barium fluoride Chemical compound [F-].[F-].[Ba+2] OYLGJCQECKOTOL-UHFFFAOYSA-L 0.000 description 3
- 229910001632 barium fluoride Inorganic materials 0.000 description 3
- WUKWITHWXAAZEY-UHFFFAOYSA-L calcium difluoride Chemical compound [F-].[F-].[Ca+2] WUKWITHWXAAZEY-UHFFFAOYSA-L 0.000 description 3
- 239000005387 chalcogenide glass Substances 0.000 description 3
- 229910052732 germanium Inorganic materials 0.000 description 3
- GNPVGFCGXDBREM-UHFFFAOYSA-N germanium atom Chemical compound [Ge] GNPVGFCGXDBREM-UHFFFAOYSA-N 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000149 penetrating effect Effects 0.000 description 3
- 230000001105 regulatory effect Effects 0.000 description 3
- 239000000523 sample Substances 0.000 description 3
- 229910052594 sapphire Inorganic materials 0.000 description 3
- 239000010980 sapphire Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000002195 soluble material Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
- H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
-
- 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/0208—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using focussing or collimating elements, e.g. lenses or mirrors; performing aberration correction
-
- 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/02—Details
- G01J3/0205—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows
- G01J3/0229—Optical elements not provided otherwise, e.g. optical manifolds, diffusers, windows using masks, aperture plates, spatial light modulators or spatial filters, e.g. reflective filters
-
- 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/12—Generating the spectrum; Monochromators
- G01J3/14—Generating the spectrum; Monochromators using refracting elements, e.g. prisms
-
- 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/2823—Imaging spectrometer
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/14—Optical objectives specially designed for the purposes specified below for use with infrared or ultraviolet radiation
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B13/00—Optical objectives specially designed for the purposes specified below
- G02B13/18—Optical objectives specially designed for the purposes specified below with lenses having one or more non-spherical faces, e.g. for reducing geometrical aberration
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0203—Containers; Encapsulations, e.g. encapsulation of photodiodes
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/02—Details
- H01L31/0232—Optical elements or arrangements associated with the device
- H01L31/02325—Optical elements or arrangements associated with the device the optical elements not being integrated nor being directly associated with the device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L31/08—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors
- H01L31/10—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof in which radiation controls flow of current through the device, e.g. photoresistors characterised by potential barriers, e.g. phototransistors
- H01L31/101—Devices sensitive to infrared, visible or ultraviolet radiation
- H01L31/102—Devices sensitive to infrared, visible or ultraviolet radiation characterised by only one potential barrier
-
- 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/12—Generating the spectrum; Monochromators
- G01J3/14—Generating the spectrum; Monochromators using refracting elements, e.g. prisms
- G01J2003/145—Prism systems for straight view
-
- 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
- G01J3/00—Spectrometry; Spectrophotometry; Monochromators; Measuring colours
- G01J3/28—Investigating the spectrum
- G01J3/2803—Investigating the spectrum using photoelectric array detector
- G01J2003/2813—2D-array
-
- 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
- G01J2005/0077—Imaging
Definitions
- the present description relates generally to the field of infrared imaging and relates in particular to an infrared camera in which an image is detected by said infrared camera through a porthole transparent to infrared radiation.
- an infrared camera or “IR camera” suitable for capturing thermal images of a scene can be used.
- An IR camera generally comprises an arrangement of infrared-sensitive detectors forming a matrix of pixels. Each pixel in the pixel array converts a temperature measured at the pixel level into a corresponding voltage signal, which is converted by a digital-to-analog converter (ADC) into a digital output signal.
- ADC digital-to-analog converter
- a micro-bolometer is an example of a pixel used for an uncooled pixel-array infrared camera, suitable for capturing thermal images of a scene.
- an IR camera can be positioned in an enclosure, or at the very least be placed behind a wall so that the radiation is detected by the IR camera through the wall.
- This wall can be inclined at a non-zero angle relative to the vertical.
- the wall is provided with an element transparent to IR radiation, for example a porthole, this porthole being positioned so that the IR camera can receive the IR radiation through said window.
- a porthole has the smallest possible side dimensions.
- One embodiment overcomes all or part of the aforementioned drawbacks.
- an infrared imaging device comprising an infrared camera having an optical axis, said camera being intended to detect infrared radiation in a spectral range through an element transparent to said infrared radiation, the transparent element being inclined at an angle of inclination greater than 0° and less than 90° or less than 0° and greater than -90° with respect to an image capture direction; the device further comprising a refracting element transparent to infrared radiation in the spectral range and able to be positioned between the transparent element and the infrared camera, said refracting element comprising a virtual output facet of the refracting element, corresponding to a facet output of the refracting element in a tunnel diagram of said refracting element, said virtual exit facet being substantially parallel to an entry facet of the refracting element.
- the transparent element comprises two faces, an input face and an output face, preferably substantially planar and parallel to each other.
- the input facet is adapted to refract an infrared ray of the spectral range penetrating into the refracting element, and is intended to be positioned facing the transparent element
- the output facet is adapted to refract the infrared ray leaving the refracting element, and is positioned facing the infrared camera
- the refracting element further comprising at least one intermediate facet adapted to reflect the infrared ray between the input facet and the output facet.
- the inner surface of the intermediate facet is covered with a reflective coating adapted to increase the reflection of infrared radiation on said inner surface, for example a metal coating.
- the intermediate facet comprises at least one surface adapted to correct optical aberrations, for example an irregular surface, of the free-form type, for example non-axisymmetric.
- the refracting element and the infrared camera are positioned relatively to one another so that the refracted optical axis of the refracting element is substantially parallel to, or substantially coincides with, the optical axis of the infrared camera .
- the optical axis of the infrared camera is offset by a distance relative to the refracted optical axis of the refracting element in a direction perpendicular to said refracted optical axis.
- the exterior surface of the input facet and/or the exterior surface of the output facet is covered with an antireflection coating.
- the refracting element is a prism.
- the prism does not generate chromatic dispersion.
- the prism is of the Dove prism type, said prism having the shape of a pyramid with a truncated rectangular base comprising a first base, a second base with a lower surface than said first base, a first lateral plane connecting the first and second bases and inclined at a first angle with respect to the first base, a second lateral plane connecting the first and second bases, facing the first lateral plane and inclined at a second angle with respect to the first base , the second angle being the opposite of the first angle, the first angle being greater than 0° and less than 90°, for example between 30 and 60°, the first lateral plane forming the entry facet, the second lateral plane forming the exit facet, and the first base forming the intermediate facet.
- the prism is a half-pentaprism of the Bauernfeind prism type, said prism comprising a base forming the entrance facet, a first lateral plane arranged facing the base and forming the intermediate facet , and a second lateral plane connecting the base and the first lateral plane and forming the exit facet.
- the facets are oriented with respect to each other so that an infrared ray is refracted through the input facet at an angle equal to the angle of incidence of the output facet.
- the entrance facet of the refracting element has a surface greater than or equal to the surface of the transparent element.
- the input facet of the refracting element is substantially parallel to the transparent element.
- the exit facet has a surface substantially equal to the surface of the entrance facet.
- the output facet has a lower surface than the surface of the input facet.
- the infrared camera further comprises at least one lens and one lens mount, said at least one lens being held by said lens mount, at least one lens and/or the lens mount comprising a truncated face adapted to be positioned opposite the output facet of the refracting element, the truncated face being for example substantially parallel to the output facet.
- the infrared camera comprises:
- the at least one lens is at least partially surrounded by the lens frame.
- the transparent element is surrounded by a frame and is adapted to be inserted with said frame into the opening of a wall, at least part of the wall in which the transparent element is inserted being inclined at the same angle of inclination as the transparent element.
- the transparent element is preferably included in the volume released by the opening of the wall, that is to say the volume corresponding to the opening of the wall.
- the transparent element does not protrude laterally on either side of the opening.
- the wall is inclined by the angle of inclination around the opening.
- the wall is entirely inclined by the angle of inclination.
- the device comprises means for attaching the refracting element adapted to attach said refracting element to the wall or to the frame.
- the device comprises an interface element adapted to provide an interface between the infrared camera and the mount, said interface element furthermore being adapted to hold the refracting element between the element transparency and the infrared camera.
- At least one inner surface of the interface element is shaped so as to reduce the emission of infrared radiation by said interface element towards the camera. According to one embodiment, at least one inner surface of the interface element is made of a material suitable for reducing the emission of infrared radiation by said interface element towards the camera.
- At least one inner surface of the interface element is covered with a coating adapted to reduce the emission of infrared radiation by said interface element towards the camera.
- the interface element comprises a first end adapted to cling to the frame of the transparent element, for example by complementarity of shape with said frame.
- the interface element comprises a second end adapted to be attached to the infrared camera, for example by shape complementarity with at least part of said infrared camera.
- the interface element comprises a first end shaped to attach to the mount and a second end shaped to attach to the camera.
- the interface element comprises a body between the first and the second end.
- the interface element is in two parts assembled on either side of the infrared camera. According to a particular embodiment, the interface element is in one piece.
- the interface element has a hollow shape.
- the infrared camera comprises at least one lens and one lens mount, said at least one lens being held by said lens mount, the second end of the interface element is adapted to cling to the lens frame, for example by form complementarity with said lens frame.
- the infrared camera comprises at least one lens and a lens mount
- said at least one lens being held by said lens mount, the interface element and the lens mount are in one piece.
- the interface element is equipped with at least one temperature sensor.
- at least one temperature probe is connected to a module for processing stray light fluxes, for example a stray light flux emitted by the device.
- the device comprises a removable shutter element adapted to shut off the infrared camera, for example assembled with the interface element and/or placed between the refractor element and the infrared camera.
- the shutter element is covered with an emissive coating on one face of said shutter element located facing the infrared camera.
- the interface element comprises at least one inner emitting surface oriented facing the infrared camera and adapted to be positioned close to the transparent element, for example against the frame of the transparent element.
- said inner surface is for example covered with an emissive coating on its face located facing the infrared camera.
- the interface element comprises a portion adapted to be positioned facing a region of the transparent element, for example an edge of said transparent element, so as to form a screen between said region of the transparent element and the infrared camera, said portion comprising an emitting face oriented facing the infrared camera.
- said emitting face is covered with an emissive coating.
- the two embodiments previously described make it possible to voluntarily degrade the vignetting over a region of the field of view of the infrared camera, preferably a region that is not critical for the intended application, and to produce an image of an interior surface of the interface element facing said degraded region of the field of view.
- the temperature determined by the image sensor in this degraded region of the field of view can then be used in a parasitic light flux processing module.
- the infrared camera comprises a pixel array image sensor comprising an angular pixel suitable for capturing a light flux originating from an interior zone of the interface element oriented facing the sensor of image and of the field of view of the angular pixel, for example an interior zone adapted to be positioned around the transparent element.
- said interior zone is covered with an emissive coating.
- angular pixel is meant a parasitic light flux detection pixel, or parasitic thermal flux, which is a pixel having a modified field of vision compared to that of image pixels of the pixel matrix, in order to promote the capture of stray heat.
- each stray heat sensing pixel is arranged to capture a larger portion of stray heat than each image pixel in the pixel array.
- One embodiment provides a system comprising: an infrared imaging device according to one embodiment and
- the infrared camera of the device being adapted to detect infrared radiation of the spectral range through the transparent element; the transparent element being inclined by an angle of inclination greater than 0° and less than 90° or less than 0° and greater than -90° with respect to an image capture direction.
- the transparent element is surrounded by a mount and is inserted with said mount into the opening of a wall, at least part of the wall in which the transparent element is inserted being inclined the same angle of inclination as the transparent element.
- the transparent element comprises two faces, an input face and an output face, preferably substantially planar and parallel to each other.
- the wall is inclined by the angle of inclination around the opening.
- the wall is entirely inclined by the angle of inclination.
- Figure IB are sectional views showing an example of an infrared camera arranged behind an inclined wall
- FIG. 2A is a sectional view showing an example of an infrared imaging device according to one embodiment
- FIG. 2B represents a view of a tunnel diagram of the prism of the infrared imaging device of FIG. 2A;
- FIG. 2C is a sectional view representing a variant of the example of infrared imaging device of FIG. 2A;
- FIG. 3 is a sectional view showing another example of an infrared imaging device according to one embodiment
- FIG. 4 is a sectional view representing another example of an infrared imaging device according to one embodiment
- FIG. 5 is a sectional view showing another example of an infrared imaging device according to one embodiment
- FIG. 6A is a sectional view showing another example of an infrared imaging device according to one embodiment
- FIG. 6B represents a view of a tunnel diagram of the prism of the infrared imaging device of FIG. 6A.
- the optics for example the lenses and their mounting
- the image sensor for example the matrix image sensor in the form of a matrix of micro-bolometers or a matrix of photodiodes, are only detailed, being known by the person of the art in the field of the invention.
- angle values When reference is made to angle values, it should be understood that these values are in the counterclockwise direction, represented by the quarter-circle arrow with the "+" sign in the figures. A negative angle value thus corresponds to an angle oriented clockwise.
- the horizontal X, Y and vertical Z directions are defined in the frame of reference of the infrared camera.
- a tunnel diagram represents, like a straight line, the optical path that a light ray takes within the prism between the entry facet and the exit facet of said prism.
- a tunnel diagram we thus define a virtual exit facet, but we also visualize the real entrance facet.
- the infrared camera 110 comprises a housing 112 containing an image sensor 114 sensitive to infrared radiation, as well as a window 116 located opposite the image sensor 114 and able to transmit IR radiation in the spectral range d.
- IR camera which is for example between 1 and 20 ⁇ m, preferably between 8 and 14 ⁇ m, or even between 8 and 12 ⁇ m.
- the image sensor is advantageously a matrix image sensor consisting of a matrix of micro-bolometers.
- the image sensor is a matrix image sensor consisting of a matrix of photodiodes based on semiconductor materials.
- the IR camera further comprises a plurality of lenses 118 (only one has been shown but there are generally several of them) able to operate in the spectral range of use of the camera so as to form an image on the sensor.
- image the camera is in the image focal plane of the lenses
- the lenses being held in a lens mount 119 assembled to the housing 112.
- the lens mount 119 is positioned so that the window 116 is disposed between said mount and the image sensor 114.
- the sensor and the lens define the optical axis A of the camera. In the example shown, the optical axis A is in the horizontal direction X.
- the IR camera 110 can be positioned in an enclosure, or at least be placed behind a wall 130, so that the radiation is detected by the IR camera through said wall.
- Such an enclosure or wall can perform a mechanical and/or thermal protection function of the camera, and/or protection of the camera with respect to the environment, and/or an aerodynamic function, and/or a user protection function (for example a shield, in particular a windshield) , or even an aesthetic function (for example to hide the camera) .
- the wall 130 can be a planar wall, as shown. Alternatively, it may include locally, in the vicinity of the camera, at least one flat wall portion.
- the wall may not be transparent to IR radiation, be unable to transmit an image, for example be rough or scattering, or may not transmit IR radiation with sufficient quality in the spectral range of use of the camera.
- IR IR.
- a window 132 transparent to IR radiation in the spectral range of use of the IR camera be inserted into an opening in the wall.
- the porthole 132 can for example be inserted into the wall using a porthole mount 134.
- the porthole 132 is suitable for transmitting IR radiation to the IR camera 110.
- the porthole can be formed from a plate of zinc sulphide (ZnS), zinc selenide (ZnSe), silicon ( Si), germanium (Ge), barium fluoride (BaF 2 ), calcium fluoride (CaF 2 ), sapphire, chalcogenide glass or any other material transparent to IR radiation in the spectral range of use of the IR camera.
- the porthole 132 is characterized by two substantially parallel faces of a given occupation surface (called "pupil"), the two faces being separated by a distance (thickness).
- the dimensions of the two faces are for example of the order of a centimeter, or ten centimeters, with a thickness of the order of a few millimeters.
- the wall 130 and the window 132 can be inclined by an angle of inclination 0 with respect to the vertical direction.
- the angle ⁇ is strictly between 0 and 90°, and more specifically between 30° and 70°, for example around 60°.
- the wall 130 and the porthole 132 can be inclined by an angle a with respect to the direction of image capture C, which is represented in the horizontal direction X.
- the angle a is complementary to the angle ⁇ , it is therefore strictly between 0 and 90°, and more specifically between 20° and 60°, for example around 30° or around 40°.
- the pupil of the porthole be as small as possible. Indeed, given that the surface occupied by the wall is subtracted from the surface occupied by the window and possibly by the window frame, this reduces the capacity of the wall to fulfill its function, for example its function of protection or aesthetics. In addition, increasing the porthole pupil may alter the mechanical integrity of the wall. In addition, the material used to form the pupil of the window has a non-negligible cost, which it is sought to reduce by reducing the pupil, and to a lesser extent its thickness.
- the reduction of the pupil of the porthole, when the latter is tilted has the consequence and disadvantage of limiting the field of view of the IR camera (known as "FOV” for "Field Of View” in English), by causing a phenomenon of vignetting, since the rays at the ends of the field of view are cut by the edge of the porthole.
- FOV Field Of View
- VFOV vertical field of view
- HFOV horizontal field of view
- the vignetting phenomenon worsens when the distance between the porthole and the IR camera increases.
- the IR camera 110 may exhibit asymmetrical vertical vignetting, for example vignetting favoring the upper part of the vertical field of view. Symmetrical vignetting can be obtained by vertically offsetting the optical axis A of the IR camera 110 by a distance D with respect to the refracted optical axis B of the window 132, as shown in FIG. 1B. However, this may have the effect of further reducing the spacing between the IR camera and the wall, as can be seen by comparing Figures 1A and 1B.
- the inventors propose an infrared imaging device making it possible to meet these needs.
- Figure 2A is a sectional view representing an example of an infrared imaging device according to a mode of embodiment comprising an infrared camera 210 shown behind a wall 130 (the wall not forming part of the device).
- the infrared camera 210 comprises a housing 212 containing an image sensor 214 sensitive to radiation in the infrared, as well as a window 216 located in gaze of the image sensor 214 and capable of transmitting IR radiation in the spectral range of use of the IR camera.
- the image sensor is advantageously a matrix image sensor comprising a matrix of micro-bolometers.
- the image sensor is a matrix image sensor comprising a matrix of photodiodes based on semiconductor materials.
- the spectral range of use of the IR camera can be designated “spectral range”.
- the IR camera further comprises a plurality of lenses 218 capable of operating in the spectral range so as to form an image on the image sensor, the camera being in the image focal plane of the lenses.
- the lenses are held in a lens mount 219 assembled to the housing 212, the lens mount 219 being positioned so that the window 216 is disposed between said mount and the sensor 214.
- the sensor and the lenses define the optical axis A of the camera, represented substantially in the horizontal direction X.
- the wall 130 is similar to the wall shown in Figures IA and IB. Thus, it comprises a porthole 132 (also referred to as "transparent element"), the porthole being transparent to infrared radiation in the spectral range. Porthole 132 is inserted with a porthole mount 134 in an opening of the wall 130.
- the wall can be a shield, for example a windshield.
- the wall may be a wall of an enclosure, for example a closed enclosure, in particular a closed enclosure capable of being thermally regulated.
- the porthole can be formed from a plate of zinc sulphide (ZnS), zinc selenide (ZnSe), silicon (Si), germanium (Ge), barium fluoride (BaF 2 ), calcium fluoride (CaF 2 ), sapphire, chalcogenide glass or any other material transparent to IR radiation in the spectral range of use of the IR camera.
- ZnS zinc sulphide
- ZnSe zinc selenide
- Si silicon
- Ge germanium
- BaF 2 barium fluoride
- CaF 2 calcium fluoride
- sapphire chalcogenide glass or any other material transparent to IR radiation in the spectral range of use of the IR camera.
- the wall 130 and the window 132 are inclined at an angle a with respect to the direction of image capture C which is shown substantially in the horizontal direction X.
- the angle of inclination a is strictly between 0 and 90°, and more specifically between 20° and 60°, for example around 30° or around 50°.
- the transparent element for example the porthole, is characterized by two faces, an entry face and an exit face, substantially planar and parallel to each other.
- the angle of inclination of the wall corresponds locally to the angle of inclination of the window, that is to say to the angle of inclination of the window at least at the place where the transparent element is inserted into the wall.
- the infrared camera is suitable for capturing a thermal image of a scene through the inclined window.
- the IR imaging device 200 further comprises a refracting prism 230 (refractor element) transparent to radiation in the spectral range.
- the prism 230 is positioned between the window 132 and the IR camera 210.
- the prism 230 shown is a Dove prism.
- first base 236 large base
- second base 238 small base
- first lateral plane 232 entry facet
- second lateral plane 234 exit facet
- the angle p is greater than 0° and less than 90°, for example between 30 and 60°.
- the first side plane 232 forms an entry facet
- the second side plane 234 forms an exit facet
- the large base 236 forms an intermediate facet.
- the input facet 232 is adapted to refract an infrared ray of the spectral range penetrating into the prism, and is positioned facing the transparent element 132.
- the output facet 234 is adapted to refract the outgoing infrared ray of the prism, and is positioned opposite the infrared camera 210.
- the intermediate facet 236 is adapted to reflect the infrared ray between the input facet and the output facet.
- the angle p of the prism 230 is chosen so that said prism can be inserted between the inclined window 132 and the infrared camera 210.
- the angle p can be chosen to be substantially equal to the angle of inclination a of the wall: in this case, the large base 236 of the prism 230 can be positioned in the horizontal direction X, as we can see this in the configuration of Figure 2C. But this is not limiting and the large base 236 of the prism 230 can be inclined with respect to the horizontal direction X, as can be seen in FIG. 2A, in which the angle p of the prism is different from the angle inclination a.
- the angle p is imposed and the infrared camera 210 is positioned to capture the infrared radiation refracted by the output facet 234 of the prism 230.
- the length L of the prism 230 can be defined so that the refracted optical axis B of the prism passes through the centers of the entry 232 and exit 234 facets.
- the length L of the prism 230 can be defined so that the refracted optical axis B of the prism is off-center with respect to the centers of the entry facets 232 and output 234.
- the prism 230 and the infrared camera 210 are positioned relative to each other so that the refracted optical axis B of the prism 230 substantially coincides with the axis optical A of the infrared camera, but this is not limiting as will be seen in the description in relation to FIG. 2C.
- a refracting element such as the prism 230 between the porthole and the IR camera makes it possible to narrow the IR rays coming from the ends of the field of view of the IR camera, in order to limit the phenomenon of vignetting, in particular the phenomenon of vignetting linked to the distance between the infrared camera and the porthole. This makes it possible to prevent the IR rays at the ends of the field of view of the IR camera from being cut by the edge of the porthole, or at least to limit this phenomenon. This also makes it possible to move the spacing constraint between the IR camera and the wall, and to lighten it substantially, and this, whatever the angle of inclination a of the wall.
- the spacing limit between the IR camera and the wall is transferred between the prism and the IR camera, as represented by the dotted circle in FIG. 2A, but it is less constraining insofar as, due to the refraction by the prism, it is not necessary for the IR camera to be against the prism for the IR rays at the edges of the porthole to be picked up by said camera.
- the device comprises an assembly means (not shown) of the prism to the wall, for example to the window frame.
- the refracting element for example the prism 230, can be made of the same material as the window 132;
- the refracting element for example the prism 230
- the prism 230 can be made of zinc sulphide (ZnS), zinc selenide (ZnSe), silicon (Si), germanium (Ge), barium fluoride (BaF 2 ), calcium fluoride (CaF 2 ), sapphire, chalcogenide glass
- the interior surface of the intermediate facet of the refracting element for example the interior surface 236B of the intermediate facet 236 of the prism 230
- the interior surface 236B of the intermediate facet 236 of the prism 230 can be covered with a reflective coating adapted to increase the reflection of infrared radiation on said interior surface, by example a metallic coating
- the intermediate facet of the refracting element for example the intermediate facet 236 of the prism 230
- the outer surface of the exit facet of the refracting element for example the outer surface 234A of the exit facet 234 of the prism 230, can be covered with an antireflection coating;
- the surfaces of the refracting element not affected by the optical functions for example the outer and/or inner surface of the small base 238 and/or the outer surface of the large base 236 of the prism 230, can be frosted and/or structured according to an anti-stray light function.
- a Dove prism has the advantage of limiting optical aberrations and chromatic dispersions. In particular, this can make it possible to limit the blurring in the image captured by the camera. This advantage is due to the positioning of the output facet with respect to the input facet, as explained below.
- FIG. 2B represents a view of a tunnel diagram of the prism 230 of the infrared imaging device of FIG. 2A.
- the virtual prism 230' is obtained by virtually unfolding the prism 230 at each internal reflection, forming a virtual exit facet 234' which is parallel to the entrance facet 232.
- This configuration gives the prism 230 its non dispersive.
- FIG. 2C is a sectional view representing a variant of the example of infrared imaging device of FIG. 2A.
- the device 201 of FIG. 2C differs from the device 200 of FIG. 2A mainly in that the optical axis A of the camera 210 is offset by a distance D with respect to the refracted optical axis B of the prism 230 in the vertical direction Z. This can allow, in some cases, to make the field of view of the camera 210 symmetrical so as not to favor the upper field of view with respect to the lower field of view, or vice versa.
- the prism 230 operates by inverting the image by 180° with respect to the optical axis A.
- the image being moreover inverted by 180° by the lenses of the IR camera, we therefore find the initial orientation of the captured scene. For example, if one wishes to favor the lower field of view, the shift can be oriented downwards, as shown; if, on the contrary, it is desired to favor the upper field of view, the offset can be oriented upwards.
- Figure 3 is a sectional view showing another example of an infrared imaging device 300 according to one embodiment, which differs from the infrared imaging device 201 of Figure 2C mainly in that the small base 338 of the Dove prism 330 is not parallel to the large base 336 (intermediate facet). Consequently, the entry 332 and exit 334 facets do not have the same surface. On the other hand, as can be seen with the virtual prism 330' of the tunnel diagram of the prism 330, the virtual exit facet 334' is always parallel to the entry facet 332.
- the entrance facet 332 may have a surface substantially equal to the pupil of the porthole 132, while the exit facet 334 may have a smaller surface.
- the length L of the prism 330 can be defined so that the refracted optical axis B of the prism passes through the center of the input facet 332 and of the output facet 334 of reduced size.
- Figure 4 is a sectional view showing another example of infrared imaging device 400 according to one mode embodiment, which differs from the IR imaging device 201 of FIG. 2C mainly in that it further comprises an interface element 440 positioned between the infrared camera 210 and the window mount 134.
- the interface element 440 is adapted to provide an interface between said infrared camera and said porthole mount.
- This interface element is further adapted to maintain the refraction prism 230 between the porthole 132 and the infrared camera 210.
- the interface element 440 makes it possible to precisely position the infrared camera 210 relative to the porthole 132, as well as the prism 230 relative to the porthole and to the infrared camera, in the direction of the optical axis A (the horizontal direction X in the example shown), and in a direction perpendicular to the optical axis A (the vertical direction Z in the example shown).
- the optical axis A of the camera 210 is offset in the vertical direction Z with respect to the refracted optical axis B of the prism.
- the optical axis A of the camera can coincide with the refracted optical axis B of the prism.
- the interface element 440 represented is a rigid element, in one piece, having an external shape of a truncated cylinder, adapted to be inserted between the window mount 134 and the IR camera 210.
- the element interface 440 shown includes:
- a first end 442 shaped to cling to the window frame 134 by complementarity of shape with said frame, thus coming to assemble with the wall 130 all around the window 132;
- the second end of the interface element can be shaped to hook onto the housing 212 of the IR camera, or both the lens mount 219 and the housing 212.
- the body 446 forms an envelope that is preferably opaque to light radiation in a spectral range. Said envelope is thus preferably adapted to block all or part of stray light rays coming from the rear of the wall 130, capable of penetrating into the space between said wall and the IR camera 210, for example in the optical path between the porthole 132 and the IR camera 210, the parasitic light rays being able to generate a parasitic image on the image sensor 214.
- Holding rings 447 extend inside the body 446 and are shaped to bear against the prism 230 in order to hold it and center it in a given position between the window 132 and the infrared camera 210
- the holding rings 447 rest on surfaces of the prism other than the entry and exit facets, for example on the large base and/or the small base, and/or on one or more lateral facets perpendicular to the Y direction.
- the interface element 440 is a separate element from the wall 130 and from the infrared camera 210. This facilitates the replacement of the various elements of the wall and/or of the device. IR imaging, for example in the event of maintenance, or when the interface element must be changed in order to be able to place the infrared camera behind a different wall or behind an identical wall with a different angle of inclination, or even when the wall needs to be replaced, for example if it is damaged during use.
- FIG. 4 represents an embodiment of the interface element, other embodiments, described below, can be applied to the interface element.
- the interface element can be integral with the lens mount, or even with the casing of the infrared camera.
- the interface element may be able to provide a fluid-tight seal between the porthole mount and the IR camera.
- This can make it possible to reduce the variations in composition of the gas, for example of the air, in the space comprised between the porthole and the IR camera and contained in said interface element.
- this can make it possible to reduce the humidity, particles and/or dust in said space, so as to provide the most constant image quality possible or at least to limit the variations in image quality.
- the space between the porthole and the IR camera can be saturated with nitrogen, with a low concentration of particles and/or dust before being enclosed in the interface element. It can also protect the prism from certain environmental conditions.
- the prism may be formed from a material which has strong thermo-optical properties, and may need to be partly thermally regulated.
- the prism may be made of a water-soluble material and should be protected from damage in a high relative humidity environment.
- At least a first inner surface of the interface element is formed from an absorbent material in the spectral range of use of the IR camera or is covered with an absorbent coating in said spectral range.
- At least a second inner surface of the interface element is formed from a reflective material in the spectral range of use of the IR camera, for example metal, or is covered with a reflective coating in said spectral range, for example a metallic coating.
- the interface element comprises at least a first inner surface formed from an absorbent material in the spectral range of use of the IR camera or covered with an absorbent coating in said spectral range. , and at least a second inner surface formed from a reflective material in said spectral range, for example metallic, or covered with a reflective coating in said spectral range, for example a metallic coating.
- the first and second surfaces are for example defined as a function of exposure to stray light radiation and/or as a function of a temperature gradient likely to impact them.
- all or part of the interior surfaces of the interface element is shaped to limit the emission of parasitic light radiation by said interface element towards the IR camera, for example the interior surfaces of the interface element tilted towards the camera are reduced or even excluded.
- the interface element comprises, inside said element, at least one structure adapted to limit the emission of parasitic light radiation by said interface element towards the camera, for example a structure of the screen, cache and/or light trap type. It could be one (or more) structure(s) arranged regularly around the optical axis in the interface element, or structures arranged irregularly around the optical axis in the interface element.
- the interface element is made of a material with low heat conduction, for example with heat conduction of less than 10 Wm -1 .K _1 .
- the environment around the porthole can undergo temperature variations, in particular depending on the conditions outside the wall, or the temperature variations can degrade the performance of the infrared camera and/or generate non-uniformities in the response between different pixels of a matrix of pixels (for an infrared camera with a matrix of pixels), in particular by generating a parasitic thermal flux.
- the wall is a wall of an enclosure capable of being thermally regulated
- the combination of thermal regulation in the enclosure and thermal insulation by the interface element makes it possible to obtain better performance of the infrared camera.
- the interface element is provided with at least one temperature sensor.
- a temperature sensor can preferably be placed inside said interface element, but can also be placed outside said interface element.
- several temperature probes can be positioned at different locations of the interface element in order to be able to determine a temperature gradient.
- At least one temperature sensor is connected to a module for processing the parasitic light flux, that is to say the light flux captured by the infrared camera but coming from at least one source other than the scene, by example a parasitic luminous flux emitted by the device and/or the porthole.
- the stray light flux processing module can be included in, or be connected to, an image processing module in order to determine the light flux originating essentially from the scene, for example by correcting it for the stray light flux.
- the interface element may include:
- At least one internal emitting surface oriented facing the infrared camera and positioned close to the transparent element, for example against the frame of the transparent element, said internal surface being for example covered with an emissive coating on its face located next to the infrared camera;
- the infrared camera can comprise a pixel matrix image sensor comprising an angular pixel suitable for capturing a light flux originating from an interior zone of the interface element oriented facing the sensor. 'image and in the field of view of said angular pixel, for example an inner zone positioned around the transparent element, the zone being for example covered with an emissive coating.
- FIG. 5 is a sectional view showing another example of an infrared imaging device 500 according to one embodiment, which differs from the device 200 of Figure 2A mainly in that at least one lens 518 of the camera infrared 510 includes a truncated face 517 opposite the output facet 234 of the prism 230.
- the lens mount not shown, is also truncated. This makes it possible to position the infrared camera 210 as close as possible to the prism 230. By reducing the distance between the infrared camera and the prism, the optical distance between the infrared camera and the window is reduced and the phenomenon can be further reduced, if necessary. of vignetting.
- the truncated face 517 is substantially parallel to the exit facet 234.
- the lens truncation is designed so as not to degrade the optical performance of the lens.
- a truncated lens has at least one irregular optical surface, for example of the free-form type.
- the irregular optical surface is preferably at least non-axially symmetrical.
- FIG. 6A is a sectional view representing another example of an infrared imaging device 600 according to one embodiment, which differs from the device 200 of FIG. 2A mainly in that the refracting element is a prism of Bauernfeind 630, instead of a Dove prism.
- the Bauernfeind prism 630 is a half-pentaprism comprising a base 632 forming the entrance facet, a first lateral plane 636 arranged facing the base and forming the intermediate facet, and a second lateral plane 634, connecting the base and the first lateral plane and forming the exit facet.
- the input facet 632 is positioned facing the porthole 132.
- the output facet 634 is positioned facing the infrared camera 210.
- the facets 632, 634, 636 of the prism 630 are oriented with respect to each other so as to that an infrared ray is refracted through the entrance facet at an angle equal to the angle of incidence of the exit facet
- the infrared camera 210 is positioned to capture the infrared radiation refracted by the output facet 634 of the prism 630.
- the prism 630 and the infrared camera 210 are positioned relative to each other so that the refracted optical axis B of the prism substantially coincides with the optical axis A of the infrared camera .
- the optical axis A of the camera 210 can be offset with respect to the refracted optical axis B of the prism in the vertical direction Z.
- a refracting element such as the prism 630 between the porthole and the IR camera makes it possible, similar to the prism 230 of FIG. 2A, to narrow the IR rays coming from the ends of the field of view of the IR camera.
- a refracting element such as the prism 630 between the porthole and the IR camera makes it possible, similar to the prism 230 of FIG. 2A, to narrow the IR rays coming from the ends of the field of view of the IR camera.
- the phenomenon of vignetting in particular the phenomenon of vignetting linked to the distance between the infrared camera and the window.
- This makes it possible to prevent the IR rays at the ends of the field of view of the IR camera from being cut by the edge of the porthole, or at least to limit this phenomenon.
- This also makes it possible to move the constraint of spacing between the IR camera and the wall, and to lighten it considerably, and this, whatever the angle of inclination a of the wall.
- a Bauernfeind prism has the advantage of limiting optical aberrations and chromatic dispersions, which can make it possible to limit blurring in the image captured by the camera. This advantage is due to the positioning of the output facet with respect to the input facet, as explained below.
- FIG. 6B represents a view of a tunnel diagram of the prism of the infrared imaging device of FIG. 6A.
- the virtual prism 630' is obtained by virtually unfolding the prism 630 at each internal reflection, forming a virtual exit facet 634' which is parallel to the entrance facet 632. This configuration gives the prism 630 its non dispersive.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Condensed Matter Physics & Semiconductors (AREA)
- Electromagnetism (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Optics & Photonics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Multimedia (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA3234654A CA3234654A1 (fr) | 2021-10-08 | 2022-10-07 | Dispositif d'imagerie infrarouge |
CN202280077050.2A CN118285109A (zh) | 2021-10-08 | 2022-10-07 | 红外成像装置 |
IL311817A IL311817A (en) | 2021-10-08 | 2022-10-07 | Infrared imaging device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FRFR2110690 | 2021-10-08 | ||
FR2110690A FR3128085A1 (fr) | 2021-10-08 | 2021-10-08 | Dispositif d’imagerie infrarouge |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2023057635A1 true WO2023057635A1 (fr) | 2023-04-13 |
Family
ID=80787442
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2022/077974 WO2023057635A1 (fr) | 2021-10-08 | 2022-10-07 | Dispositif d'imagerie infrarouge |
Country Status (5)
Country | Link |
---|---|
CN (1) | CN118285109A (fr) |
CA (1) | CA3234654A1 (fr) |
FR (1) | FR3128085A1 (fr) |
IL (1) | IL311817A (fr) |
WO (1) | WO2023057635A1 (fr) |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2110092A5 (fr) | 1970-10-31 | 1972-05-26 | Peressini Gabriele | |
US6166764A (en) * | 1997-02-14 | 2000-12-26 | Mitsubishi Denki Kabushiki Kaisha | Camera and vehicle-surroundings visual-recognition apparatus using the same |
US6256155B1 (en) * | 1998-09-11 | 2001-07-03 | Olympus Optical Co., Ltd. | Objective optical system |
FR2895525A1 (fr) * | 2005-12-22 | 2007-06-29 | Diehl Bgt Defence Gmbh & Co Kg | Optique additionnelle pour plage spectrale infrarouge |
US20070216768A1 (en) * | 2006-03-14 | 2007-09-20 | Ford Global Technologies, Llc | Device and method for outwardly looking ir camera mounted inside vehicles particularly suited for pre-crash sensing and pedestrian detection |
US20090212202A1 (en) * | 2008-02-26 | 2009-08-27 | Koichi Takahashi | Imaging apparatus for taking images of objects in a plurality of directions and vehicle incorporating the same |
WO2019234215A1 (fr) | 2018-06-08 | 2019-12-12 | Lynred | Dispositif et procédé de compensation de la chaleur parasite dans une caméra infrarouge |
WO2019234216A1 (fr) | 2018-06-08 | 2019-12-12 | Lynred | Dispositif et procédé de compensation de la chaleur parasite dans une caméra infrarouge |
US20210088745A1 (en) * | 2018-06-06 | 2021-03-25 | Huawei Technologies Co., Ltd. | Lens module, photographing module, and terminal device |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5981937A (en) * | 1997-10-14 | 1999-11-09 | Denaro; James | Optical system for observing rotating objects |
-
2021
- 2021-10-08 FR FR2110690A patent/FR3128085A1/fr active Pending
-
2022
- 2022-10-07 WO PCT/EP2022/077974 patent/WO2023057635A1/fr active Application Filing
- 2022-10-07 CN CN202280077050.2A patent/CN118285109A/zh active Pending
- 2022-10-07 IL IL311817A patent/IL311817A/en unknown
- 2022-10-07 CA CA3234654A patent/CA3234654A1/fr active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2110092A5 (fr) | 1970-10-31 | 1972-05-26 | Peressini Gabriele | |
US6166764A (en) * | 1997-02-14 | 2000-12-26 | Mitsubishi Denki Kabushiki Kaisha | Camera and vehicle-surroundings visual-recognition apparatus using the same |
US6256155B1 (en) * | 1998-09-11 | 2001-07-03 | Olympus Optical Co., Ltd. | Objective optical system |
FR2895525A1 (fr) * | 2005-12-22 | 2007-06-29 | Diehl Bgt Defence Gmbh & Co Kg | Optique additionnelle pour plage spectrale infrarouge |
US20070216768A1 (en) * | 2006-03-14 | 2007-09-20 | Ford Global Technologies, Llc | Device and method for outwardly looking ir camera mounted inside vehicles particularly suited for pre-crash sensing and pedestrian detection |
US20090212202A1 (en) * | 2008-02-26 | 2009-08-27 | Koichi Takahashi | Imaging apparatus for taking images of objects in a plurality of directions and vehicle incorporating the same |
US20210088745A1 (en) * | 2018-06-06 | 2021-03-25 | Huawei Technologies Co., Ltd. | Lens module, photographing module, and terminal device |
WO2019234215A1 (fr) | 2018-06-08 | 2019-12-12 | Lynred | Dispositif et procédé de compensation de la chaleur parasite dans une caméra infrarouge |
WO2019234216A1 (fr) | 2018-06-08 | 2019-12-12 | Lynred | Dispositif et procédé de compensation de la chaleur parasite dans une caméra infrarouge |
Also Published As
Publication number | Publication date |
---|---|
IL311817A (en) | 2024-05-01 |
FR3128085A1 (fr) | 2023-04-14 |
CN118285109A (zh) | 2024-07-02 |
CA3234654A1 (fr) | 2023-04-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
FR2686697A1 (fr) | Dispositif de detection de defauts dans des pieces bicouches, notamment dans des cellules solaires. | |
FR2974189A1 (fr) | Systeme d'imagerie comprenant une lentille de fresnel | |
EP2335110A2 (fr) | Système d'imagerie grand champ infrarouge intégré dans une enceinte à vide | |
EP0674775B1 (fr) | Telescope pour imagerie infrarouge ou visible | |
WO2023057635A1 (fr) | Dispositif d'imagerie infrarouge | |
EP1046933B1 (fr) | Dispositif optique à gradient d'absorption et à filtrage spectral sélectif ainsi qu'objectif et appareil de prise d'images munis d'un tel dispositif | |
EP0540092B1 (fr) | Détecteur d'images à lumière parasite réduite et application à un senseur de terre | |
WO2023046893A1 (fr) | Dispositif d'imagerie infrarouge | |
WO2019097196A1 (fr) | Structure de module de charge utile pour drone stratospherique | |
FR2897165A1 (fr) | Optique grand angle dans le spectre infrarouge | |
WO2021170960A1 (fr) | Dispositif optique permettant de mesurer rapidement l'emission angulaire d'une source de lumiere de surface finie | |
FR3101963A1 (fr) | Afficheur tête-haute comportant un masque avec une ouverture | |
FR3141450A1 (fr) | Télescope de Schmidt à performances améliorées, dispositifs et procédé de détection associés | |
EP1383316A1 (fr) | Imageur optique non refroidi | |
EP2161605B1 (fr) | Système d'observation avec ensemble de garde | |
FR3059156B1 (fr) | Module de detection optique | |
EP0614103B1 (fr) | Lunette à miroirs oscillants pour la vision infrarouge | |
FR3122262A1 (fr) | Télescope compact pour la détection de débris spatiaux | |
WO2023073296A1 (fr) | Dispositif de mesure des performances d'un detecteur optique et procede de mesure associe | |
FR3118201A1 (fr) | Systeme optique imageur a trois miroirs | |
EP4314888A1 (fr) | Téléscope à faible réémission en direction du plan focal et appareil optique d'émission-réception comprenant un tel téléscope/ | |
FR3016704A1 (fr) | Capteur d'image infrarouge a grand champ de vision et grande ouverture numerique | |
FR2874427A1 (fr) | Unite d'isolation thermique pour un detecteur et utilisation de celle-ci | |
FR2942048A1 (fr) | Dispositif de capture d'images 360° comprenant un systeme catadiotrique couple a un capteur d'images. | |
FR2913768A1 (fr) | Appareil de detection de rayonnements infrarouges comprenant au moins deux ecrans froids a sections elliptiques |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 22800650 Country of ref document: EP Kind code of ref document: A1 |
|
WWE | Wipo information: entry into national phase |
Ref document number: 311817 Country of ref document: IL |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18698187 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 3234654 Country of ref document: CA |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2022800650 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
ENP | Entry into the national phase |
Ref document number: 2022800650 Country of ref document: EP Effective date: 20240508 |