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公开(公告)号：US10139478B2
公开(公告)日：2018-11-27
申请号：US15861147
申请日：2018-01-03
Applicant: LUMINAR TECHNOLOGIES, INC.
Inventor： Stephen D. Gaalema , Austin K. Russell , Joseph G. LaChapelle , Scott R. Campbell , Jason M. Eichenholz , Tue Tran
Abstract: To decrease the likelihood of a false detection when detecting light from light pulses scattered by remote targets in a lidar system, a receiver in the lidar system includes a photodetector and a pulse-detection circuit having a gain circuit with a varying amount of gain over time. The gain circuit operates in a low-gain mode for a time period T1 beginning with time t0 when a light pulse is emitted to prevent the receiver from detecting return light pulses during the threshold time period T1. Upon expiration of the threshold time period T1, the gain circuit operates in a high-gain mode to begin detecting return light pulses until a subsequent light pulse is emitted.
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公开(公告)号：US20180284276A1
公开(公告)日：2018-10-04
申请号：US15940494
申请日：2018-03-29
Applicant: LUMINAR TECHNOLOGIES, INC.
Inventor： Scott R. Campbell
Abstract: A lidar system includes a light source configured to emit a beam of light including a sequence of pulses, a scanner configured to scan, using the sequence of pulses, a field of regard of the lidar system along a horizontal dimension and a vertical dimension in accordance with a first scan pattern; a receiver configured to detect light from at least some of the pulses scattered by one or more remote targets to generate an array of pixels, based on the sequence of pulses of the beam of light. The lidar system is further configured to modify the first scan pattern in view of a result of processing the generated array of pixels to generate a second scan pattern, and scan the field of regard using the sequence of pulses along the horizontal dimension and the vertical dimension in accordance with the second scan pattern.
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公开(公告)号：US10088559B1
公开(公告)日：2018-10-02
申请号：US15876669
申请日：2018-01-22
Applicant: LUMINAR TECHNOLOGIES, INC.
Inventor： Matthew D. Weed , Scott R. Campbell , Lane A. Martin , Jason M. Eichenholz , Austin K. Russell , Rodger W. Cleye , Melvin L. Stauffer
Abstract: To compensate for motor dynamics in a scanner in a lidar system, a light source transmits light pulses at a variable pulse rate in accordance with a scan speed of the scanner. More specifically, the pulse rate may be directly related to the scan speed so that the light source transmits light pulses uniformly across a field of regard. A controller may determine the scan speed and provide a control signal to the light source adjusting the pulse rate accordingly.
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公开(公告)号：US20180269646A1
公开(公告)日：2018-09-20
申请号：US15901838
申请日：2018-02-21
Applicant: LUMINAR TECHNOLOGIES, INC.
Inventor： David Welford , Martin A. Jaspan , Jason M. Eichenholz , Scott R. Campbell , Lane A. Martin , Matthew D. Weed
CPC classification number: H01S3/1115 , G01S7/4814 , G01S7/484 , G01S17/10 , G01S17/42 , G01S17/88 , H01S3/0092 , H01S3/061 , H01S3/0612 , H01S3/0621 , H01S3/0627 , H01S3/08 , H01S3/094076 , H01S3/094084 , H01S3/0941 , H01S3/09415 , H01S3/1022 , H01S3/113 , H01S3/1611 , H01S3/1643 , H01S3/1673 , H01S3/30
Abstract: A lidar system can include a solid-state laser to emit pulses of light. The solid-state laser can include a Q-switched laser having a gain medium and a Q-switch. The lidar system can also include a scanner configured to scan the emitted pulses of light across a field of regard and a receiver configured to detect at least a portion of the scanned pulses of light scattered by a target located a distance from the lidar system. The lidar system can also include 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 to travel from the lidar system to the target and back to the lidar system.
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公开(公告)号：US20180120433A1
公开(公告)日：2018-05-03
申请号：US15859170
申请日：2017-12-29
Applicant: Luminar Technologies, Inc.
Inventor： Jason M. Eichenholz , Austin K. Russell , Scott R. Campbell , Alain Villeneuve , Rodger W. Cleye , Joseph G. LaChapelle , Matthew D. Weed , Lane A. Martin
CPC classification number: G01S17/06 , G01S7/4804 , G01S7/4811 , G01S7/4814 , G01S7/4815 , G01S7/4816 , G01S7/4817 , G01S7/4818 , G01S7/483 , G01S7/484 , G01S7/4861 , G01S7/4863 , G01S7/4865 , G01S17/00 , G01S17/02 , G01S17/08 , G01S17/10 , G01S17/32 , G01S17/42 , G01S17/88 , G01S17/89 , G01S17/936 , H01S3/0007 , H01S3/0078 , H01S3/0085 , H01S3/06733 , H01S3/0675 , H01S3/06754 , H01S3/06758 , H01S3/08086 , H01S3/094003 , H01S3/094042 , H01S3/094076 , H01S3/0941 , H01S3/10023 , H01S3/1106 , H01S3/1608 , H01S3/2383 , H01S5/0057 , H01S5/0085 , H01S5/4012 , H01S5/4087 , H01S2301/02
Abstract: A lidar system with a pulsed laser diode to produce a plurality of optical seed pulses of light at one or more operating wavelengths between approximately 1400 nm and approximately 1600 nm. The lidar system may also include one or more optical amplifiers to amplify the optical seed pulses to produce a plurality of output optical pulses. Each optical amplifier may produce an amount of amplified spontaneous emission (ASE), and the output optical pulses may have characteristics comprising: a pulse repetition frequency of less than or equal to 100 MHz; a pulse duration of less than or equal to 20 nanoseconds; and a duty cycle of less than or equal to 1%. The lidar system may also include one or more optical filters to attenuate the ASE and a receiver to detect at least a portion of the output optical pulses scattered by a target located a distance.
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Patent Agency Ranking
公开(公告)号：US09869754B1
公开(公告)日：2018-01-16
申请号：US15466702
申请日：2017-03-22
Applicant: LUMINAR TECHNOLOGIES, INC.
Inventor： Scott R. Campbell , Rodger W. Cleye , Jason M. Eichenholz , Lane A. Martin , Matthew D. Weed
CPC classification number: G01S17/10 , G01S7/4817 , G01S17/42 , G01S17/87
Abstract: In one embodiment, a system includes a first lidar sensor, which includes a first scanner configured to scan first pulses of light along a first scan pattern and a first receiver configured to detect scattered light from the first pulses of light. The system also includes a second lidar sensor, which includes a second scanner configured to scan second pulses of light along a second scan pattern and a second receiver configured to detect scattered light from the second pulses of light. The first scan pattern and the second scan pattern are at least partially overlapped. The system further includes an enclosure, where the first lidar sensor and the second lidar sensor are contained within the enclosure. The enclosure includes a window configured to transmit the first pulses of light and the second pulses of light.
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公开(公告)号：US09823353B2
公开(公告)日：2017-11-21
申请号：US15470735
申请日：2017-03-27
Applicant: Luminar Technologies, Inc.
Inventor： Jason M. Eichenholz , Austin K. Russell , Scott R. Campbell , Alain Villeneuve , Rodger W. Cleye , Joseph G. LaChapelle , Matthew D. Weed , Lane A. Martin
CPC classification number: G01S17/06 , G01S7/4804 , G01S7/4811 , G01S7/4814 , G01S7/4815 , G01S7/4816 , G01S7/4817 , G01S7/4818 , G01S7/483 , G01S7/484 , G01S7/4861 , G01S7/4863 , G01S7/4865 , G01S17/00 , G01S17/02 , G01S17/08 , G01S17/10 , G01S17/32 , G01S17/42 , G01S17/88 , G01S17/89 , G01S17/936 , H01S3/0007 , H01S3/0078 , H01S3/0085 , H01S3/06733 , H01S3/0675 , H01S3/06754 , H01S3/06758 , H01S3/08086 , H01S3/094003 , H01S3/094042 , H01S3/094076 , H01S3/0941 , H01S3/10023 , H01S3/1106 , H01S3/1608 , H01S3/2383 , H01S5/0057 , H01S5/0085 , H01S5/4012 , H01S5/4087 , H01S2301/02
Abstract: A lidar system with a light source to emit a pulse of light into a field of view and a receiver to detect a return pulse of light which is reflected or scattered by a target in the field of view. The receiver may include an avalanche photodiode to generate an electrical-current pulse corresponding to the return pulse and a transimpedance amplifier to produce a voltage pulse that corresponds to the electrical-current pulse. A voltage amplifier may amplify the voltage pulse and a comparator may produce an edge signal when the amplified voltage pulse exceeds a threshold. A time-to-digital converter may determine a time interval based on an emission time of the pulse of light and based on the edge signal. A processor may determine a distance to the target using the time interval.
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公开(公告)号：US09810786B1
公开(公告)日：2017-11-07
申请号：US15461380
申请日：2017-03-16
Applicant: LUMINAR TECHNOLOGIES, INC.
Inventor： David Welford , Martin A. Jaspan , Jason M. Eichenholz , Scott R. Campbell , Lane A. Martin , Matthew D. Weed
CPC classification number: G01S17/10 , G01S7/4812 , G01S7/4814 , G01S7/4817 , G01S7/484 , G01S17/42 , G02F1/39 , H01S3/0092 , H01S3/0612 , H01S3/0621 , H01S3/0627 , H01S3/09415 , H01S3/1086 , H01S3/113 , H01S3/1611 , H01S3/1643 , H01S3/1673
Abstract: In one embodiment, a lidar system includes a pump laser configured to produce pulses of light at a pump wavelength. The lidar system further includes an optical parametric oscillator (OPO) with an OPO medium configured to: receive the pump pulses from the pump laser; convert at least part of the received pump pulses into pulses of light at a signal wavelength and pulses of light at an idler wavelength; and emit at least a portion of the signal pulses. The lidar system also includes a scanner configured to scan the emitted pulses of light across a field of regard and a receiver configured to detect at least a portion of the scanned pulses of light scattered by a target located a distance from the lidar system. The lidar system also includes a processor configured to determine the distance from the lidar system to the target.
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公开(公告)号：US20170131388A1
公开(公告)日：2017-05-11
申请号：US15342728
申请日：2016-11-03
Applicant: Luminar Technologies, Inc.
Inventor： Scott R. Campbell , Jason M. Eichenholz , Lane A. Martin , Matthew D. Weed
CPC classification number: G01S7/4817 , G01S7/4812 , G01S7/4816 , G01S17/10 , G01S17/42 , G01S17/89
Abstract: A lidar system can include a light source that emits a pulse of light and a splitter that splits the pulse of light into two or more pulses of angularly separated light. The lidar system can also include a scanner configured to scan pulses of light along a scanning direction across a plurality of pixels located downrange from the lidar system. The lidar system can also include a detector array with a first detector and a second detector. The first and second detectors can be separated by a detector-separation distance along a direction corresponding to the scanning direction of the light pulses. The first detector can be configured to detect scattered light from the first pulse of light and the second detector can be configured to detect scattered light from the second pulse of light.
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公开(公告)号：US20200284906A1
公开(公告)日：2020-09-10
申请号：US16879091
申请日：2020-05-20
Applicant: Luminar Technologies, Inc.
Inventor： Jason M. Eichenholz , Scott R. Campbell , John E. McWhirter , Matthew D. Weed , Lane A. Martin
IPC: G01S17/08 , G01S7/481 , G02B26/10 , G02B26/12 , H01L27/146 , G01S17/42 , G01S17/931 , G02B5/09 , G02B7/182 , G01S17/89 , G02B27/09 , G02B27/10 , G02B27/30 , H01L25/16
Abstract: 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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