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公开(公告)号：US20180284226A1
公开(公告)日：2018-10-04
申请号：US15909012
申请日：2018-03-01
Applicant: LUMINAR TECHNOLOGIES, INC.
Inventor： Joseph G. LaChapelle , Matthew D. Weed , Scott R. Campbell , Jason M. Eichenholz , Austin K. Russell , Lane A. Martin
CPC classification number: G01S7/484 , G01S7/003 , G01S7/4868 , G01S7/497 , G01S17/10 , G01S17/42 , G01S17/936 , G01S17/95 , G01S2007/4975 , G01W1/02 , G01W1/14 , Y02A90/19
Abstract: To detect an atmospheric condition at the current location of a lidar system, a receiver in the lidar system detects a return light pulse scattered by a target and analyzes the characteristics of the return light pulse. The characteristics of the return light pulse include a rise time, a fall time, a duration, a peak power, an amount of energy, etc. When the rise time, fall time, and/or duration exceed respective thresholds, the lidar system detects the atmospheric condition such as fog, sleet, snow, rain, dust, smog, exhaust, or insects. In response to detecting the atmospheric condition, the lidar system adjusts the characteristics of subsequent pulses to compensate for attenuation or distortion of return light pulses due to the atmospheric condition. For example, the lidar system adjusts the peak power, pulse energy, pulse duration, inter-pulse-train spacing, number of pulses, or any other suitable characteristic.
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Patent Agency Ranking
公开(公告)号：US20180284225A1
公开(公告)日：2018-10-04
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：US20180088236A1
公开(公告)日：2018-03-29
申请号：US15818501
申请日：2017-11-20
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 and a receiver to detect a return pulse of light. The receiver can include a first channel to receive a first portion of the return pulse and produce a first digital output signal, and a second channel to receive a second portion of the return pulse and produce a second digital output signal. The receiver can include a logic circuit to produce an output electrical-edge signal in response to receiving the digital output signals. The receiver can also include a time-to-digital converter to determine a time interval based on an emission time of the pulse of light and based on the electrical-edge signal. The lidar system can also include a processor to determine a distance to a target based at least in part on the time interval.
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公开(公告)号：US09905992B1
公开(公告)日：2018-02-27
申请号：US15461394
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
IPC: H01S3/11 , H01S3/0941 , G01S17/00 , G01S17/10
CPC classification number: H01S3/1115 , G01S7/4814 , G01S17/10 , 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: In one embodiment, a lidar system includes a self-Raman laser that includes a Raman-active gain medium and a Q-switch. The self-Raman laser is configured to: produce Q-switched pulses of light at a lasing wavelength of the self-Raman laser; Raman-shift, in the Raman-active gain medium, at least a portion of the Q-switched pulses to produce Raman-shifted pulses of light, where the Raman-shifted pulses have a Raman-shifted wavelength that is longer than the lasing wavelength; and emit at least a portion of the Raman-shifted pulses. The lidar system further 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：US09857468B1
公开(公告)日：2018-01-02
申请号：US15470708
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 pulsed laser diode configured to produce an optical seed pulse of light at an operating wavelength between approximately 1400 nm and approximately 1600 nm. The lidar system may also include an optical amplifier configured to amplify the optical seed pulse to produce an eye-safe output optical pulse that is emitted into a field of view. The optical amplifier may produce an amount of amplified spontaneous emission (ASE) associated with the output optical pulse. The lidar system may include an optical filter configured to filter the output optical pulse to reduce the associated ASE. The lidar system may also include a receiver configured to detect at least a portion of the output optical pulse reflected or scattered from the field of view.
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公开(公告)号：US09810775B1
公开(公告)日：2017-11-07
申请号：US15461378
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
IPC: G01C3/08 , G01S7/481 , G01S17/10 , H01S3/11 , H01S3/0941
CPC classification number: G01S7/4814 , G01S7/4817 , G01S17/10 , G01S17/42 , H01S3/0092 , H01S3/0612 , H01S3/0627 , H01S3/09415 , H01S3/113 , H01S3/1643
Abstract: In one embodiment, a lidar system includes a Q-switched laser configured to emit pulses of light, where the Q-switched laser includes a gain medium and a Q-switch. The lidar system further 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 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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