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    Lidar System with AlInAsSb Avalanche Photodiode
    34.
    发明申请
    Lidar System with AlInAsSb Avalanche Photodiode 审中-公开

    公开(公告)号：US20190310368A1

    公开(公告)日：2019-10-10

    申请号：US15947308

    申请日：2018-04-06

    Applicant: Luminar Technologies, Inc.

    Inventor： Joseph G. LaChapelle

    IPC: G01S17/08 ,  G02B27/09 ,  G01S17/93 ,  H01L27/146

    Abstract: In one embodiment, a lidar system includes a light source configured to emit pulses of light and a scanner configured to scan the emitted pulses of light across a field of regard of the lidar system. The lidar system also includes a receiver configured to detect a portion of the emitted pulses of light scattered by a target located a distance from the lidar system. The receiver includes an aluminum-indium-arsenide-antimonide (AlInAsSb) avalanche photodiode (APD) configured to: receive a pulse of light of the portion of the emitted pulses of light scattered by the target and produce an electrical-current pulse corresponding to the received pulse of light. 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 the received pulse of light.

    Reducing the number of false detections in a lidar system
    36.
    发明授权
    Reducing the number of false detections in a lidar system 有权

    公开(公告)号：US10295668B2

    公开(公告)日：2019-05-21

    申请号：US15843652

    申请日：2017-12-15

    Applicant: LUMINAR TECHNOLOGIES, INC.

    Inventor： Joseph G. LaChapelle ,  Jason M. Eichenholz ,  Laurance S. Lingvay

    IPC: G01S17/10 ,  G01S7/484

    Abstract: A light source includes a laser configured to emit a ranging pulse including a sequence of fast pulses. A lidar system uses one or more properties of the sequence of fast pulses to determine a signature of the ranging pulse. A receiver includes a detector element configured to detect a light signal and a signature detection circuitry configured to determine whether the detected light signal corresponds to the signature of the emitted ranging pulse. The lidar system is configured to generate a pixel value based on the detected light signal if the detected light signal corresponds to the signature of the emitted ranging pulse.

    DETECTION OF CROSSTALK AND JAMMING PULSES WITH LIDAR SYSTEM
    37.
    发明申请
    DETECTION OF CROSSTALK AND JAMMING PULSES WITH LIDAR SYSTEM 审中-公开

    公开(公告)号：US20190129009A1

    公开(公告)日：2019-05-02

    申请号：US16178049

    申请日：2018-11-01

    Applicant: Luminar Technologies, Inc.

    Inventor： Jason M. Eichenholz ,  Joseph G. LaChapelle

    IPC: G01S7/48 ,  G01S7/491 ,  G01S17/93

    Abstract: A lidar system identifies anomalous optical pulses received by the lidar system. The lidar system includes a light source configured to output a plurality of transmitted pulses of light, each transmitted pulse of light having one or more representative characteristics, a scanner configured to direct the plurality of transmitted pulses of light to a plurality of locations within a field of regard, and a receiver configured to detect a plurality of received pulses of light from the field of regard. The lidar system is configured to identify an anomalous pulse amongst the plurality of received pulses of light based on its having at least one characteristic that does not correspond to the one or more representative characteristics of the plurality of transmitted pulses of light.

    Optical detector having a bandpass filter in a lidar system
    38.
    发明授权
    Optical detector having a bandpass filter in a lidar system 有权

    公开(公告)号：US10121813B2

    公开(公告)日：2018-11-06

    申请号：US15909563

    申请日：2018-03-01

    Applicant: LUMINAR TECHNOLOGIES, INC.

    Inventor： Jason M. Eichenholz ,  Scott R. Campbell ,  Joseph G. LaChapelle

    IPC: G01S7/481 ,  H01L27/146 ,  H01L23/00 ,  G01S17/93

    Abstract: To detect light from light pulses at the operating wavelength of a light source in a lidar system, a thin-film notch filter is directly deposited on a photodetector or a lens via vacuum deposition or monolithic epoxy. The thin-film notch filter may include an anti-reflective coating such as a pattern-coated dichroic filter having an optical transmission of 90% or greater at in-band wavelengths and less than 5% at out-of-band wavelengths. To deposit the filter onto the photodetector without disrupting electronic connections between the photodetector and an application-specific integrated circuit, the area surrounding the electrodes on the photodetector is kept open using photolithography.

    LIDAR DETECTOR SYSTEM HAVING RANGE WALK COMPENSATION
    40.
    发明申请
    LIDAR DETECTOR SYSTEM HAVING RANGE WALK COMPENSATION 审中-公开

    公开(公告)号：US20180284275A1

    公开(公告)日：2018-10-04

    申请号：US15727131

    申请日：2017-10-06

    Applicant: LUMINAR TECHNOLOGIES, INC.

    Inventor： Joseph G. LaChapelle

    IPC: G01S17/10 ,  G01S7/486 ,  G01S7/497 ,  G01S7/48

    Abstract: A detector system within a lidar receiver is configured to compensate for range walk error by detecting both the rising edge and the falling edge of a received light pulse as the envelope of the received light pulse passes through a particular detection (magnitude) threshold. Detection circuitry within the detector system then determines the center of the received light pulse as the point equidistant in time between the detected rising and falling edges of the received light pulse, and uses the time associated with the center of the received light pulse to determine the range to the target from which the scattered light pulse was received.

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