WO2023013771A1 - 発光装置、距離撮像装置、および監視装置 - Google Patents
発光装置、距離撮像装置、および監視装置 Download PDFInfo
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- WO2023013771A1 WO2023013771A1 PCT/JP2022/030139 JP2022030139W WO2023013771A1 WO 2023013771 A1 WO2023013771 A1 WO 2023013771A1 JP 2022030139 W JP2022030139 W JP 2022030139W WO 2023013771 A1 WO2023013771 A1 WO 2023013771A1
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- Prior art keywords
- light
- emitting device
- imaging device
- light emitting
- housing
- Prior art date
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- 238000003384 imaging method Methods 0.000 title claims description 45
- 238000012806 monitoring device Methods 0.000 title claims description 7
- 230000003287 optical effect Effects 0.000 claims description 31
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000005540 biological transmission Effects 0.000 abstract 1
- 230000017525 heat dissipation Effects 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 230000014509 gene expression Effects 0.000 description 5
- 238000000295 emission spectrum Methods 0.000 description 4
- 238000002366 time-of-flight method Methods 0.000 description 3
- 230000002708 enhancing effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 239000004020 conductor Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
- F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
- F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
- F21S41/12—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of emitted light
- F21S41/13—Ultraviolet light; Infrared light
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/08—Systems determining position data of a target for measuring distance only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/02—Systems using the reflection of electromagnetic waves other than radio waves
- G01S17/06—Systems determining position data of a target
- G01S17/42—Simultaneous measurement of distance and other co-ordinates
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/89—Lidar systems specially adapted for specific applications for mapping or imaging
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S17/00—Systems using the reflection or reradiation of electromagnetic waves other than radio waves, e.g. lidar systems
- G01S17/88—Lidar systems specially adapted for specific applications
- G01S17/93—Lidar systems specially adapted for specific applications for anti-collision purposes
- G01S17/931—Lidar systems specially adapted for specific applications for anti-collision purposes of land vehicles
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4811—Constructional features, e.g. arrangements of optical elements common to transmitter and receiver
- G01S7/4813—Housing arrangements
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/481—Constructional features, e.g. arrangements of optical elements
- G01S7/4814—Constructional features, e.g. arrangements of optical elements of transmitters alone
- G01S7/4815—Constructional features, e.g. arrangements of optical elements of transmitters alone using multiple transmitters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
- B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
- B60Q1/0017—Devices integrating an element dedicated to another function
- B60Q1/0023—Devices integrating an element dedicated to another function the element being a sensor, e.g. distance sensor, camera
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
- G01S7/00—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00
- G01S7/48—Details of systems according to groups G01S13/00, G01S15/00, G01S17/00 of systems according to group G01S17/00
- G01S7/483—Details of pulse systems
- G01S7/486—Receivers
- G01S7/4865—Time delay measurement, e.g. time-of-flight measurement, time of arrival measurement or determining the exact position of a peak
Definitions
- the present disclosure relates to a light emitting device that includes multiple light sources that emit light used for distance imaging.
- the present disclosure also relates to each of a distance imaging device and a monitoring device including the light emitting device.
- Patent Document 1 discloses a distance imaging device mounted on a vehicle, which is an example of a monitoring device.
- a distance imaging device includes a light emitting device, an imaging device, and an arithmetic device.
- the light emitting device emits light toward an area located in front of the vehicle, which is an example of a monitoring area.
- the imaging device acquires an image of the object based on the light reflected by the object located in the area.
- the calculation device calculates the distance to the object based on the time from when the light is emitted from the light emitting device until the light enters the imaging device.
- a first example embodiment that can be provided by the present disclosure is a light-emitting device, a plurality of light sources that emit light including non-visible wavelengths; a housing that defines at least part of a space in which the plurality of light sources are housed; and The housing has a translucent portion that allows passage of light in the non-visible wavelength range and blocks passage of light in the visible wavelength range.
- a second embodiment example that can be provided by the present disclosure is a range imaging device, a light emitting device according to the first embodiment; an imaging device that acquires an image of a subject based on the light reflected by the subject; an arithmetic device that calculates the distance to the subject based on the time from when the light is emitted from the light emitting device until the light enters the imaging device; It has
- a third example aspect that may be provided by the present disclosure is a monitoring device comprising: The distance imaging device according to the second aspect is provided, and the light emitting device according to the first aspect is caused to emit the light toward a predetermined monitoring area.
- Multiple light sources are used to supply light for information acquisition to a wider surveillance area. Since the emission spectra of elements used as light sources generally differ slightly among the elements, the more the number of light sources used, the more desired the spectrum of the combined light forming the final light distribution pattern. The probability that components deviating from the characteristics are included increases. If the component is unexpectedly included in the visible wavelength range, there is a risk that the light emitted from the light-emitting device may be visually recognized by a person in the surveillance area, even though distance imaging using invisible light is intended. be.
- the wavelength selectivity of the light-transmitting portion of the housing is obtained. Therefore, only the light in the non-visible wavelength range can be made to reach the monitoring area. Since it is possible to increase the degree of freedom in selecting elements used as a plurality of light sources, it is possible to reduce the burden of optical design for enhancing the light distribution of light emitted from a light emitting device having a plurality of light sources.
- FIG. 1 illustrates a functional configuration of a distance imaging device according to an embodiment
- a vehicle in which the distance imaging device of FIG. 1 is mounted is illustrated.
- 2 is an exploded perspective view illustrating the configuration of the light emitting device of FIG. 1;
- FIG. 4 is a front view illustrating the optical member of FIG. 3;
- FIG. 4 is a rear view illustrating the optical member of FIG. 3;
- FIG. It illustrates a cross-section seen from the arrow direction along the line VI-VI in FIG. 2 is a cross-sectional view illustrating the configuration of the light emitting device of FIG. 1;
- FIG. 8 illustrates an appearance of the housing of FIG. 7 viewed from the front. The appearance of the housing seen from the arrow IX direction in FIG. 8 is illustrated.
- FIG. 8 illustrates a light distribution pattern formed by light that has passed through the translucent portion of FIG. 7 .
- 4 illustrates a light distribution pattern formed by light passing through a light transmitting portion according to a first comparative example; The light distribution pattern formed by the light which passed through the translucent part which concerns on a 2nd comparative example is illustrated.
- arrow F indicates the forward direction of the illustrated structure.
- Arrow B indicates the rearward direction of the illustrated structure.
- Arrow U indicates the upward direction of the illustrated structure.
- Arrow D indicates the downward direction of the illustrated structure.
- Arrow R indicates the right direction of the illustrated structure.
- Arrow L indicates the left direction of the illustrated structure.
- front-back direction used in this specification means a direction along the above-mentioned forward direction and backward direction.
- vertical refers to directions along the upward and downward directions.
- lateral refers to directions along the left and right directions described above.
- extending in the front-rear direction includes extending at an angle with respect to the front-rear direction, and means extending at an inclination closer to the front-rear direction than in the up-down direction and the left-right direction.
- extending in the vertical direction includes extending with an inclination with respect to the vertical direction, and means extending with an inclination closer to the vertical direction than in the front-rear direction and the horizontal direction.
- extending in the left-right direction includes extending at an angle to the left-right direction, and means extending at an inclination closer to the left-right direction than in the front-rear direction and the up-down direction.
- FIG. 1 illustrates the functional configuration of a distance imaging device 1 according to one embodiment.
- the distance imaging device 1 is a device that not only obtains an image IM in which a subject SB positioned within a subject area A is captured, but also obtains distance information to the subject SB.
- the distance imaging device 1 includes a light emitting device 2.
- the light emitting device 2 includes a light source that emits light L toward the subject area A. As shown in FIG. Examples of light sources include semiconductor light emitting devices such as light emitting diodes (LEDs) and laser diodes (LDs).
- LEDs light emitting diodes
- LDs laser diodes
- the distance imaging device 1 includes an imaging device 3.
- the imaging device 3 includes a light receiving element that outputs a signal corresponding to the light coming from the object area A. As shown in FIG. Examples of light receiving elements include CMOS image sensors.
- the imaging device 3 is configured to acquire an image of the subject SB based on the light L reflected by the subject SB.
- the distance imaging device 1 is equipped with an arithmetic device 4 .
- the calculation device 4 is configured to calculate the distance to the subject SB based on the time from when the light L is emitted from the light emitting device 2 until the light L enters the imaging device 3 .
- a TOF (Time of Flight) method is used to calculate the distance. Either a direct TOF method or an indirect TOF method may be used. Since the TOF method itself is well known, a detailed explanation is omitted.
- the range imaging device 1 can be mounted on a vehicle 5.
- the position of the distance imaging device 1 on the vehicle 5 is appropriately determined according to the position of the object area A.
- FIG. In this example, the distance imaging device 1 is mounted on the front right corner of the vehicle 5 .
- the subject area A set around the right corner of the vehicle 5 can be monitored.
- Vehicle 5 is an example of a mobile object.
- Vehicle 5 is an example of a monitoring device.
- the subject area A is an example of a monitoring area.
- the light emitting device 2 includes multiple light sources 21 .
- a plurality of light sources 21 are arranged to form a two-dimensional array.
- Each of the plurality of light sources 21 is configured to emit light used for distance imaging.
- the light used for distance imaging includes an infrared wavelength range. That is, the light used for distance imaging includes non-visible wavelength regions.
- the light emitting device 2 includes electronic components 22 .
- Electronic components 22 include various elements associated with operation of light source 21 . Examples of such elements include a switching element that controls turning on/off of each of the plurality of light sources 21, a temperature sensor that detects the temperature of the area where the plurality of light sources 21 are arranged, and the like.
- the light emitting device 2 has a shield member 23 .
- the shield member 23 is arranged so as to block spatial conduction of noise to the electronic component 22 .
- the noise includes electromagnetic noise and electrostatic noise.
- the shield member 23 can be made of a conductive material.
- the shield member 23 has a plurality of openings 231.
- a plurality of apertures 231 are arranged to form a two-dimensional array.
- the number of apertures 231 matches the number of light sources 21 . That is, each of the multiple apertures 231 is associated with one of the multiple light sources 21 .
- the light emitting device 2 has an optical member 24 .
- FIG. 4 illustrates the appearance of the optical member 24 viewed from the front.
- FIG. 5 illustrates the appearance of the optical member 24 as viewed from the back.
- the rear surface of the optical member 24 faces the shield member 23 .
- FIG. 6 illustrates a cross-section of the optical member 24 along line VI--VI in FIG. 4 and viewed in the direction of the arrows.
- the optical member 24 includes a plurality of lenses 241 as illustrated in FIGS.
- a plurality of lenses 241 are arranged to form a two-dimensional array.
- the multiple lenses 241 are configured to allow passage of light emitted from the multiple light sources 21 .
- the number of lenses 241 matches the number of apertures 231 . That is, each of the plurality of lenses 241 is associated with one of the plurality of apertures 231 and one of the plurality of light sources 21 .
- the optical member 24 has an exit surface 242 as illustrated in FIGS.
- the emission surface 242 is formed with minute unevenness, and is configured to scatter the light that has passed through the plurality of lenses 241 .
- light L is obtained as combined light emitted from the light emitting device 2 .
- the light emitting device 2 includes a circuit board 25. As shown in FIG. A plurality of light sources 21 and electronic components 22 are mounted on a common circuit board 25 . The plurality of light sources 21 and electronic components 22 are electrically connected through circuit wiring formed on the circuit board 25 .
- the shield member 23 is arranged between the optical member 24 and the circuit board 25 and allows passage of the light L0 through the plurality of openings 231 and shields the electronic component 22 from noise.
- the light emitting device 2 has a heat dissipation member 26 .
- the heat dissipation member 26 is a component for dissipating heat generated from the plurality of light sources 21 and electronic components 22 .
- the heat dissipation member 26 has a plurality of fins 261 for promoting heat dissipation.
- the light-emitting device 2 includes fastening members 27 .
- the fastening member 27 is a component for fastening the shield member 23 , the optical member 24 and the circuit board 25 to the heat dissipation member 26 .
- the fastening member 27 has a head portion 271 and a shaft portion 272 .
- the fastening member 27 may be, for example, a screw with a thread groove formed in the shaft portion 272 .
- a first through hole 251 is formed in the circuit board 25 .
- a second through hole 232 is formed in the shield member 23 .
- a third through hole 243 is formed in the optical member 24 .
- the circuit board 25, the shield member 23, and the optical member 24 are arranged in this order from the heat dissipation member 26 side so that the first through hole 251, the second through hole 232, and the third through hole 243 are arranged concentrically. are arranged in
- the fastening member 27 is positioned from the side of the optical member 24 such that the shaft portion 272 is disposed within the first through hole 251, the second through hole 232, and the third through hole 243. be worn.
- the shaft portion 272 is screwed into the receiving portion 262 formed on the heat dissipation member 26
- the head portion 271 presses the optical member 24 toward the heat dissipation member 26 .
- the shield member 23 and the circuit board 25 are also pressed against the heat radiating member 26 and fastened.
- the light emitting device 2 has a housing 28 .
- the housing 28 defines a space in which the plurality of light sources 21 are accommodated together with the heat radiating member 26 .
- FIG. 8 illustrates the appearance of the housing 28 viewed from the front.
- FIG. 7 corresponds to a cross-section taken along the line VII--VII in FIG. 8 and viewed in the direction of the arrows.
- FIG. 9 illustrates the appearance of the housing 28 viewed from the direction of arrow IX in FIG.
- FIG. 10 illustrates the appearance of the housing 28 viewed from the arrow X direction in FIG.
- the housing 28 has a translucent portion 281. As shown in FIG. The translucent portion 281 is arranged at a position that allows passage of the light L emitted from the plurality of light sources 21 . In other words, the translucent portion 281 is arranged on an extension line of the optical axis AX of each light source 21 .
- the translucent part 281 is configured to allow passage of light in the invisible wavelength range and block passage of light in the visible wavelength range.
- the light-transmitting part 281 may be realized by forming the housing 28 with a material having the wavelength selectivity, or may be realized by forming the housing 28 with a material that allows the passage of light in the visible wavelength range. It may be realized by forming a selective layer.
- a plurality of light sources 21 are used to supply light L for distance imaging to a wider subject area A. Since the emission spectra of the elements used as the light sources 21 are generally slightly different between the elements, the more the number of the light sources 21 used, the more the spectrum of the combined light forming the final light distribution pattern. The probability of containing components that deviate from the desired properties increases. When the component is unexpectedly included in the visible wavelength range, the light L emitted from the light emitting device 2 is visually recognized by a person in the subject area A despite the intention of distance imaging using non-visible light.
- the wavelength of the light transmitting portion 281 of the housing 28 is The selectivity allows only the light in the non-visible wavelength range to reach the object area A. Since the degree of freedom in selecting the elements used as the plurality of light sources 21 can be increased, the burden of optical design for enhancing the light distribution of the light L emitted from the light emitting device 2 having the plurality of light sources 21 can be reduced. .
- the expression "to enhance the light distribution of light emitted from the light emitting device" used in this specification means that the light distribution pattern formed by the light L actually emitted from the light emitting device 2 is adjusted to a desired shape. It means not only bringing the wavelengths close to each other, but also reducing components deviating from the desired wavelength range contained in the emitted light L.
- the configuration according to this embodiment is particularly useful when the visible wavelength component is in the red wavelength range.
- the subject area A is set in front of the vehicle 5 as exemplified in FIG. can be blocked.
- the optical axis AX of the light source 21 extends in the front-rear direction of the light emitting device 2.
- the light transmitting portion 281 of the housing 28 has a portion that extends vertically perpendicular to the optical axis AX.
- the vertical direction is an example of the first direction.
- FIG. 11 illustrates the contour shape of the light distribution pattern formed by the light L that has passed through the translucent portion 281 of the housing 28 according to this embodiment.
- FIG. 12 illustrates the contour shape of the light distribution pattern formed by the light L that has passed through the translucent portion 281' of the housing 28' according to the first comparative example.
- FIG. 13 illustrates the contour shape of the light distribution pattern formed by the light L that has passed through the translucent portion 281'' of the housing 28'' according to the second comparative example.
- the numbers on the horizontal axis represent the angle of deviation in the horizontal direction from the direction in which the optical axis AX of the light source 21 extends, which is assumed to be 0°.
- the numbers on the vertical axis represent the angle of deviation in the vertical direction from the direction in which the optical axis AX of the light source 21 extends, which is assumed to be 0°.
- the translucent portion 281' according to the first comparative example faces obliquely downward with respect to the horizontal plane. That is, the translucent portion 281 ′ obliquely crosses the optical axis AX of the light source 21 .
- the shape of the light distribution pattern formed by the light L that has passed through the translucent portion 281' is shifted upward with respect to the horizontal axis.
- the light transmitting portion 281 ′′ according to the second comparative example faces obliquely downward with respect to the horizontal plane. intersect diagonally.
- the shape of the light distribution pattern formed by the light L that has passed through the translucent portion 281'' is shifted downward with respect to the horizontal axis.
- the light distribution pattern formed by the light L passing through the translucent portion 281 according to the present embodiment, which extends in the vertical direction perpendicular to the optical axis AX, is approximately It has a symmetrical shape. This fact means that even if the light emitting device 2 is placed upside down, the light distribution characteristics do not change significantly.
- the first horizontal wall 282 and the second horizontal wall 283 of the housing 28 illustrated in FIG. look down.
- the light emitting device 2 whose posture is changed so that the first horizontal wall 282 and the second horizontal wall 283 face downward and upward, respectively, can be placed in the left front corner of the vehicle 5 as illustrated in FIG.
- the same light distribution characteristics as those of the light emitting device 2 arranged at the corner can be obtained.
- the common specification light emitting device 2 provided with the housing 28 having the light transmitting portion 281 extending in the first direction orthogonal to the optical axis AX of the light source 21 is arranged in the first direction about the axis of symmetry extending in the direction along the optical axis AX. can be arranged at a plurality of positions symmetrical in a second direction perpendicular to the . As a result, increases in manufacturing costs and management costs can be suppressed.
- the housing 28 has a laterally asymmetrical shape.
- the horizontal direction is an example of the second direction.
- the translucent portion 281 of the housing 28 obliquely intersects the optical axis AX of the light source 21 in the left-right direction.
- the effect of this configuration on the shape of the light distribution pattern is negligible compared to the vertical direction. Therefore, a shape of the housing 28 that is highly compatible with or highly compatible with the design of the vehicle 5 in which it is mounted is allowed.
- the light-emitting device 2, the imaging device 3, and the arithmetic device 4 that constitute the distance imaging device 1 do not need to be housed in a common housing. At least one of the imaging device 3 and the arithmetic device 4 can be mounted at an appropriate position on the vehicle 5 independently of the light emitting device 2 .
- the distance imaging device 1 can also be mounted on a moving object other than the vehicle 5.
- moving bodies include railroads, flying bodies, aircraft, ships, and the like.
- the mobile object may not require a driver.
- the mobile object is also an example of a monitoring device.
- the distance imaging device 1 does not need to be mounted on a mobile object.
- the range imaging device 1 can be installed in traffic infrastructure equipment such as street lights and traffic lights.
- the subject area A can be set to include the road.
- the distance imaging device 1 can be applied to a crime prevention system installed in a house, a facility, or the like to detect an object that has entered the subject area A.
- the light L emitted from the light emitting device 2 does not necessarily need to be used for range imaging.
- the light emitting device 2 having the configuration described above can be used to emit light in the non-visible wavelength range used for a LiDAR (Light Detection and Ranging) sensor that measures the distance to an object.
- LiDAR Light Detection and Ranging
- At least one of the shield member 23 and the optical member 24 may be omitted depending on the application in which the light emitting device 2 is used. As a part of the present disclosure, the contents of Japanese Patent Application No. 2021-129920 filed on August 6, 2021 are incorporated.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computer Networks & Wireless Communication (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Electromagnetism (AREA)
- General Engineering & Computer Science (AREA)
- Optical Radar Systems And Details Thereof (AREA)
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- Measurement Of Optical Distance (AREA)
Abstract
Description
非可視波長域を含む光を出射する複数の光源と、
前記複数の光源が収容される空間の少なくとも一部を区画するハウジングと、
を備えており、
前記ハウジングは、前記非可視波長域の光の通過を許容し、可視波長域の光の通過を遮断する透光部を有している。
第一態様例に係る発光装置と、
被写体により反射された前記光に基づいて当該被写体の像を取得する撮像装置と、
前記発光装置より前記光が出射されてから当該光が前記撮像装置に入射するまでの時間に基づいて当該被写体までの距離を算出する演算装置と、
を備えている。
第二態様例に係る距離撮像装置を備えており、第一態様例に係る発光装置に所定の監視領域へ向けて前記光を出射させる。
本開示の一部を構成するものとして、2021年8月6日に提出された日本国特許出願2021-129920号の内容が援用される。
Claims (7)
- 非可視波長域を含む光を出射する複数の光源と、
前記複数の光源が収容される空間の少なくとも一部を区画するハウジングと、
を備えており、
前記ハウジングは、前記非可視波長域の光の通過を許容し、可視波長域の光の通過を遮断する透光部を有している、
発光装置。 - 前記可視波長域は、赤色波長域である、
請求項1に記載の発光装置。 - 前記透光部は、前記複数の光源の各々の光軸と直交して第一方向に延びる部分を有している、
請求項1または2に記載の発光装置。 - 前記ハウジングは、前記光軸および前記第一方向と直交する第二方向について非対称な形状を有している、
請求項3に記載の発光装置。 - 請求項1から4のいずれか一項に記載の発光装置と、
被写体により反射された前記光に基づいて当該被写体の像を取得する撮像装置と、
前記発光装置より前記光が出射されてから当該光が前記撮像装置に入射するまでの時間に基づいて当該被写体までの距離を算出する演算装置と、
を備えている、
距離撮像装置。 - 請求項5に記載の距離撮像装置を備えており、前記発光装置に所定の監視領域へ向けて前記光を出射させる、
監視装置。 - 移動体である、
請求項6に記載の監視装置。
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CN202280054493.XA CN117859069A (zh) | 2021-08-06 | 2022-08-05 | 发光装置、距离拍摄装置以及监视装置 |
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JP2015043279A (ja) * | 2013-08-26 | 2015-03-05 | パナソニック株式会社 | 車両用暗視装置 |
JP2015198260A (ja) * | 2014-03-31 | 2015-11-09 | アイホン株式会社 | 監視カメラシステム |
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JP2021129920A (ja) | 2020-02-21 | 2021-09-09 | パナソニックIpマネジメント株式会社 | 髪ケア装置 |
-
2022
- 2022-08-05 EP EP22853189.3A patent/EP4382956A1/en active Pending
- 2022-08-05 WO PCT/JP2022/030139 patent/WO2023013771A1/ja active Application Filing
- 2022-08-05 US US18/681,391 patent/US20240337729A1/en active Pending
- 2022-08-05 CN CN202280054493.XA patent/CN117859069A/zh active Pending
- 2022-08-05 JP JP2023540430A patent/JPWO2023013771A1/ja active Pending
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JPH11120451A (ja) * | 1997-10-13 | 1999-04-30 | Nippon Arefu:Kk | 検知装置 |
JP2003327048A (ja) * | 2002-05-14 | 2003-11-19 | Murakami Corp | カメラ内蔵型バックミラー装置 |
JP2006007883A (ja) * | 2004-06-23 | 2006-01-12 | Stanley Electric Co Ltd | カメラ内蔵型バックミラー |
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JP2021129920A (ja) | 2020-02-21 | 2021-09-09 | パナソニックIpマネジメント株式会社 | 髪ケア装置 |
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JPWO2023013771A1 (ja) | 2023-02-09 |
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