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公开(公告)号：US20220413098A1
公开(公告)日：2022-12-29
申请号：US17359319
申请日：2021-06-25
发明人： Frank HÖLLER , Peter WESTPHAL
IPC分类号： G01S7/48 , G01S17/34 , G01S17/58 , G01S17/931
摘要： The invention relates to a system and a method for simultaneous range and velocity measurement in an FMCW LiDAR system. A first light source (16) produces first light having a first frequency that varies according to a first chirp rate. A second light source (18) produces second light having a second frequency that is constant or that varies according to a second chirp rate being different from the first chirp rate. Measuring light obtained by combining the first and second light therefore has two different frequency components during a measurement interval. A splitter (22) separates the measuring light into reference light and output light, and a scanning unit (28) directs the output light towards an object (12) and receives input light that is obtained by reflection of the output light at the object (12). A detector (32) detects a superposition of the reference light and the input light. A computing unit (34) computes unambiguously the range and relative velocity by analyzing beat frequencies resulting from the superposition, wherein ambiguities due to Doppler frequency shifts are removed by performing a decision tree analysis.
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公开(公告)号：US20240230854A1
公开(公告)日：2024-07-11
申请号：US18612997
申请日：2024-03-21
发明人： Jan HORN
IPC分类号： G01S7/481 , G01S7/4912 , G01S7/497 , G01S17/34 , G01S17/931
CPC分类号： G01S7/4817 , G01S7/4917 , G01S7/497 , G01S17/34 , G01S17/931
摘要： A device for scanning measurement of the distance to an object has a light source which generates an optical signal having a varying frequency. A scanning device directs measuring light in different directions. A detector detects a superposition of reference light and reflected light. An evaluation device determines a distance to the object from the superposition detected by the detector. A light sensor, which is arranged in the light path of the emitted measuring light behind the scanning device in such a way that it is exposed to the measuring light only once per scanning cycle, detects a scanning movement of the emitted measuring light. A switch-off device switches off the light source or otherwise prevents the emission of measuring light if the light sensor does not detect a scanning movement of the measuring light.
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3.发明申请公开(公告)号：US20220334227A1
公开(公告)日：2022-10-20
申请号：US17516398
申请日：2021-11-01
发明人： Vladimir DAVYDENKO
IPC分类号： G01S7/481 , G01S17/931 , G01S17/42 , G01S17/58
摘要： A device for scanning range measurement to an object has a light source that generates an optical output signal having a varying frequency. A plurality of optical processing units are connected optically in parallel to the light source. Each processing unit has an optical distribution matrix with a plurality of optical switches that distribute the optical output signals from the light source selectively to different optical waveguides. A plurality of free space couplers outcouple the optical output signals into the free space, and couple optical output signals, which were reflected on the object, into the associated optical waveguides as optical measurement signals. A polarization sensitive light splitter directs the optical measurement signals detectors that detect a superposition of the optical measurement signals with the optical output signals supplied via a local oscillator light path.
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公开(公告)号：US20240230853A1
公开(公告)日：2024-07-11
申请号：US18612990
申请日：2024-03-21
发明人： Jan HORN
IPC分类号： G01S7/481 , G01S17/32 , G01S17/931
CPC分类号： G01S7/4817 , G01S17/32 , G01S17/931
摘要： A device for scanning measurement of the distance to an object has a light source generating an optical signal that has a varying frequency. The output signal is coupled out of a plurality of optical output waveguides using free-space couplers. A flat plate is tilted by a rotary actuator such that the light beams emerging from the free-space couplers are offset in parallel, wherein said offset increases with increasing tilt angle. A lens deflects the light beams passing the flat plate, and a detector detects a superposition of the optical signal generated by the light source with an optical signal reflected by the object. A distance to the object is computed from the superposition detected by the detector.
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5.发明公开公开(公告)号：US20230176214A1
公开(公告)日：2023-06-08
申请号：US17878784
申请日：2022-08-01
发明人： Vladimir DAVYDENKO
IPC分类号： G01S17/34 , G01S7/481 , G01S17/931 , G01S7/4913
CPC分类号： G01S17/34 , G01S7/4817 , G01S17/931 , G01S7/4913 , G01S7/4812
摘要： A device for scanning frequency-modulated continuous wave (FMCW) LiDAR range measurement has a light source producing light having a varying frequency, a splitter splitting the light into reference light and output light, and an optical system having an optical axis. A plurality of free space couplers are arranged along a line such that the distance between adjacent free space couplers increases with increasing distance from the optical axis. Each free space coupler outcouples the output light into the free space and receives input light that was reflected at an object. A detector detects a superposition of the input light with the reference light, and a calculation unit determines the range to the object from the superposition detected by the detector.
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公开(公告)号：US11237254B2
公开(公告)日：2022-02-01
申请号：US17228117
申请日：2021-04-12
发明人： Vladimir Davydenko
摘要： A device for scanning measurement of a distance to an object has a light source, which generates an optical output signal having a time-varying frequency. The device includes multiple optical processing units, which are connected optically in parallel to the light source. Each processing unit has an optical distribution matrix including multiple optical switches that distribute optical output signals selectively onto different optical waveguides. Optical output signals are outcoupled into the free space via free space couplers and optical output signals reflected on the object are coupled as optical measurement signals into the waveguides. A detector detects a superposition of the optical measurement signal and the optical output signal generated by the light source. A circulator directs optical output signals supplied by the light source to the distribution matrix and optical measurement signals coming from the distribution matrix to the detector.
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公开(公告)号：US20210364607A1
公开(公告)日：2021-11-25
申请号：US17228117
申请日：2021-04-12
发明人： Vladimir DAVYDENKO
IPC分类号： G01S7/481 , G01S17/931 , G01S17/32 , G02F1/31
摘要： A device for scanning measurement of a distance to an object has a light source, which generates an optical output signal having a time-varying frequency. The device includes multiple optical processing units, which are connected optically in parallel to the light source. Each processing unit has an optical distribution matrix including multiple optical switches that distribute optical output signals selectively onto different optical waveguides. Optical output signals are outcoupled into the free space via free space couplers and optical output signals reflected on the object are coupled as optical measurement signals into the waveguides. A detector detects a superposition of the optical measurement signal and the optical output signal generated by the light source. A circulator directs optical output signals supplied by the light source to the distribution matrix and optical measurement signals coming from the distribution matrix to the detector.
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公开(公告)号：US11009593B1
公开(公告)日：2021-05-18
申请号：US17022522
申请日：2020-09-16
发明人： Vladimir Davydenko
IPC分类号： G01C3/08 , G01S7/481 , G01S17/32 , G02F1/31 , G01S17/931
摘要： A device for scanning measurement of a distance to an object has a light source, which generates an optical output signal having a time-varying frequency. The device includes multiple optical processing units, which are connected optically in parallel to the light source. Each processing unit has an optical distribution matrix including multiple optical switches that distribute optical output signals selectively onto different optical waveguides. Optical output signals are outcoupled into the free space via free space couplers and optical output signals reflected on the object are coupled as optical measurement signals into the waveguides. A detector detects a superposition of the optical measurement signal and the optical output signal generated by the light source. A circulator directs optical output signals supplied by the light source to the distribution matrix and optical measurement signals coming from the distribution matrix to the detector.
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9.发明授权公开(公告)号：US12111396B2
公开(公告)日：2024-10-08
申请号：US17678908
申请日：2022-02-23
IPC分类号： G01B9/02 , G01S7/481 , G01S7/4911 , G01S17/34 , G01S17/89 , G01S17/931 , G01S7/487
CPC分类号： G01S17/34 , G01S7/4814 , G01S7/4817 , G01S7/4911 , G01S17/89 , G01S17/931 , G01S7/487
摘要： A device for scanning Frequency-Modulated Continuous Wave LiDAR range measurement comprises a light source that produces light having a varying frequency, a splitter that splits the light into reference light and output light, and a distribution matrix (36) that distributes the output light among a plurality of free space couplers that outcouple the output light into free space. A plurality of optical waveguides guide input light that was reflected at an object. A detector detects a superposition of the input light with the reference light, and a calculation unit determines the range to the object from the superposition detected by the detector. The device further comprises a common optical waveguide that is optically connected to the plurality of optical waveguides and the detector so that input light that is guided in any of the optical waveguides propagates through the common optical waveguide towards the detector without passing the distribution matrix.
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10.发明公开公开(公告)号：US20230266466A1
公开(公告)日：2023-08-24
申请号：US17678908
申请日：2022-02-23
IPC分类号： G01S17/34 , G01S17/931 , G01S17/89 , G01S7/35 , G01S7/481 , G01S7/4911
CPC分类号： G01S17/34 , G01S17/931 , G01S17/89 , G01S7/354 , G01S7/4814 , G01S7/4911
摘要： A device for scanning Frequency-Modulated Continuous Wave LiDAR range measurement comprises a light source that produces light having a varying frequency, a splitter that splits the light into reference light and output light, and a distribution matrix (36) that distributes the output light among a plurality of free space couplers that outcouple the output light into free space. A plurality of optical waveguides guide input light that was reflected at an object. A detector detects a superposition of the input light with the reference light, and a calculation unit determines the range to the object from the superposition detected by the detector. The device further comprises a common optical waveguide that is optically connected to the plurality of optical waveguides and the detector so that input light that is guided in any of the optical waveguides propagates through the common optical waveguide towards the detector without passing the distribution matrix.
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