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公开(公告)号：US20240345248A1
公开(公告)日：2024-10-17
申请号：US18603652
申请日：2024-03-13
IPC分类号： G01S17/08 , G01S7/481 , G01S17/42 , G01S17/87 , G01S17/931 , G02B5/08 , G02B5/09 , G02B5/18 , G02B5/22 , G02B7/182 , G02B26/10 , G02B26/12 , G02B27/09 , G02B27/10 , G02B27/30 , H01L25/16 , H01L27/146
CPC分类号： G01S17/08 , G01S7/4813 , G01S7/4817 , G01S17/42 , G01S17/931 , G02B5/09 , G02B7/1821 , G02B26/101 , G02B26/105 , G02B26/123 , G02B26/125 , G02B27/0955 , G02B27/0977 , G02B27/1086 , G02B27/30 , H01L25/167 , H01L27/14643 , H01L27/14647 , G01S17/87 , G02B5/0841 , G02B5/1857 , G02B5/22 , H01L27/14694
摘要： A lidar system includes one or more light sources configured to generate a first beam of light and a second beam of light, a scanner configured to scan the first and second beams of light across a field of regard of the lidar system, and a receiver configured to detect the first beam of light and the second beam of light scattered by one or more remote targets. The scanner includes a rotatable polygon mirror that includes multiple reflective surfaces angularly offset from one another along a periphery of the polygon mirror, the reflective surfaces configured to reflect the first and second beams of light to produce a series of scan lines as the polygon mirror rotates. The scanner also includes a pivotable scan mirror configured to (i) reflect the first and second beams of light and (ii) pivot to distribute the scan lines across the field of regard.
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公开(公告)号：US20210055391A1
公开(公告)日：2021-02-25
申请号：US16913093
申请日：2020-06-26
IPC分类号： G01S7/4865 , G01S17/10 , G01S7/484 , G01S7/481
摘要： In one embodiment, a lidar system includes a light source configured to emit local-oscillator light and pulses of light, where each emitted pulse of light is (i) coherent with a corresponding portion of the local-oscillator light and (ii) includes a spectral signature of one or more different spectral signatures. The lidar system also includes a receiver configured to detect the local-oscillator light and a received pulse of light, the received pulse of light including light from one of the emitted pulses of light scattered by a target located a distance from the lidar system, the one of the emitted pulses of light including a particular spectral signature of the one or more spectral signatures. The local-oscillator light and the received pulse of light are coherently mixed together at the receiver. The receiver includes one or more detectors and a frequency-detection circuit.
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公开(公告)号：US20200300982A1
公开(公告)日：2020-09-24
申请号：US16893473
申请日：2020-06-05
IPC分类号： G01S7/481 , G01S17/89 , G06K9/00 , G06K9/62 , H04N5/232 , G01S17/42 , G01S17/86 , G01S17/931
摘要： A system operating in a vehicle includes a lidar module, a camera, and a controller communicatively coupled to the camera and the lidar module. The lidar module includes: a light source configured to emit pulses of light, a scanner configured to direct the emitted pulses of light in accordance with a scan pattern to illuminate a field of regard of the lidar module, and a receiver configured to detect the emitted pulses of light scattered by one or more remote objects to capture a set of lidar pixels of a scan frame, in a sequence defined by the scan pattern. The camera has a field of view that at least partially overlaps the field of regard of the lidar module. The controller is configured to cause the camera to capture multiple images while the receiver of the lidar module captures the set of lidar pixels of the scan frame.
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4.发明授权公开(公告)号：US10557939B2
公开(公告)日：2020-02-11
申请号：US15296881
申请日：2016-10-18
摘要： A lidar system with improved signal-to-noise ratio in the presence of solar background noise. The lidar system can comprise a light source to emit light toward a target. The light source can have an operating wavelength which lies within a band that delineates a relative maximum in atmospheric absorption. The lidar system can also include a detector to detect scattered light from the target and a processor to determine a characteristic of the target based on a characteristic of the scattered light received at the detector.
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公开(公告)号：US20200025923A1
公开(公告)日：2020-01-23
申请号：US16040263
申请日：2018-07-19
发明人： Jason M. Eichenholz
摘要： A method in a lidar system for scanning a field of regard of the lidar system is provided. The method includes identifying, within the field of regard, a ground portion that overlaps a region of ground located ahead of the lidar system; causing a light source to emit pulses of light; scanning at least a portion of the emitted pulses of light along a scan pattern contained within the field of regard, including adjusting a scan parameter so that at least one of a resolution or a pulse energy for the ground portion of the field of regard is modified relative to another portion of the field of regard; and detecting at least a portion of the scanned pulses of light scattered by one or more remote targets.
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公开(公告)号：US20200018854A1
公开(公告)日：2020-01-16
申请号：US16031815
申请日：2018-07-10
摘要： A machine vision system comprises a camera configured to generate one or more images of a field of regard of the camera, a lidar system, and a processor. The lidar system includes a laser configured to emit light, where the emitted light is directed toward a region within the field of regard of the camera and a receiver configured to detect light returned from the emitted light. The processor is configured to receive an indication of a location based on the returned light and determine whether a solid object is present at the location based on the one or more images.
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公开(公告)号：US20190242978A1
公开(公告)日：2019-08-08
申请号：US16389362
申请日：2019-04-19
CPC分类号： G01S7/484 , G01S7/4817 , G01S7/497 , G01S17/10 , G01S17/42 , G01S17/936
摘要： To compensate for the uneven distribution of data points around the periphery of a vehicle in a lidar system, a light source transmits light pulses at a variable pulse rate according to the orientation of the light pulses with respect to the lidar system. A controller may communicate with a scanner in the lidar system that provides the orientations of the light pulses to the controller. The controller may then provide a control signal to the light source adjusting the pulse rate based on the orientations of the light pulses. For example, the pulse rate may be slower near the front of the lidar system and faster near the periphery. In another example, the pulse rate may be faster near the front of the lidar system and slower near the periphery.
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公开(公告)号：US20190154836A1
公开(公告)日：2019-05-23
申请号：US15965197
申请日：2018-04-27
摘要： A lidar system comprises a light source configured to emit light, a scanner configured to direct the emitted light to scan a field of regard of the lidar system in accordance with a scan pattern, a receiver configured to detect the light scattered by one or more remote targets, and a controller configured to control motion of at least the second mirror to modify the scan pattern. The scanner includes a rotatable polygon mirror having a block having a first wall, a second wall, and reflective surfaces extending between the first and second walls, the reflective surfaces being angularly offset from one another along a periphery of the block. The scanner also includes a polygon mirror axle extending into the block through at least one of the first and second walls, about which the block rotates, and a second mirror pivotable along an axis orthogonal to the polygon mirror axle.
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公开(公告)号：US20190154804A1
公开(公告)日：2019-05-23
申请号：US16107521
申请日：2018-08-21
发明人： Jason M. Eichenholz
摘要： A lidar system operates in a vehicle and includes a light source configured to emit light, a scanner configured to direct the emitted light so as to scan a field of regard of the lidar system in accordance with a scan pattern, and a receiver configured to detect the light scattered by one or more remote targets. The scanner includes a rotatable polygon mirror configured to scan the FOR along a horizontal dimension, a polygon mirror axis about which the polygon mirror rotates, and a y-scan mirror pivotable along an axis orthogonal to the polygon mirror axis and configured to scan the FOR along a vertical dimension. The polygon mirror has multiple reflective surfaces being angularly offset from one another. The polygon mirror axis is disposed on a plane substantially parallel to a plane along which the vehicle moves.
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公开(公告)号：US20190107606A1
公开(公告)日：2019-04-11
申请号：US16155207
申请日：2018-10-09
摘要： In one embodiment, a lidar system includes a light source configured to emit pulses of light and a scanner configured to scan at least a portion of the emitted pulses of light across a field of regard. The field of regard contains all or part of a target located a distance from the lidar system that is less than or equal to a maximum range of the lidar system, and one or more of the emitted pulses of light are scattered by the target. The lidar system also includes a receiver configured to detect at least a portion of the pulses of light scattered by the target. The lidar system further includes a processor configured to determine the distance from the lidar system to the target based at least in part on a round-trip time of flight for an emitted pulse of light.
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