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    Lidar detector system having range walk compensation
    11.
    发明授权
    Lidar detector system having range walk compensation 有权

    公开(公告)号：US10732281B2

    公开(公告)日：2020-08-04

    申请号：US15727131

    申请日：2017-10-06

    Applicant: LUMINAR TECHNOLOGIES, INC.

    Inventor： Joseph G. LaChapelle

    IPC: G01S17/10 ,  G01S7/4865 ,  G01S7/48 ,  G01S7/497 ,  G01S7/486

    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.

    Combining lidar and camera data
    12.
    发明授权
    Combining lidar and camera data 有权

    公开(公告)号：US10677897B2

    公开(公告)日：2020-06-09

    申请号：US15954427

    申请日：2018-04-16

    Applicant: LUMINAR TECHNOLOGIES, INC.

    Inventor： Joseph G. LaChapelle ,  Jason M. Eichenholz

    IPC: G01S17/89 ,  G01S17/93 ,  G01S7/481 ,  G06K9/00 ,  G06K9/62 ,  H04N5/232 ,  G01S17/42 ,  G01S17/86 ,  G01S17/931

    Abstract: A system includes a lidar, a camera, and a controller communicatively coupled to the camera and the lidar. The lidar includes a laser configured to emit pulses of light, a scanner configured to direct the emitted pulses in accordance with a scan pattern, and a receiver configured to detect the emitted pulse of light scattered by one or more remote targets to collect a set of lidar pixels of a scan frame, in a sequence defined by the scan pattern. The camera has a field of regard that at least partially overlaps the field of regard of the lidar. The controller is configured to cause the camera to capture images while the receiver of the lidar module collects the complete set of lidar pixels of the scan frame, and align lidar pixels with corresponding pixels in the captured images.

    Multispectral lidar system
    16.
    发明授权
    Multispectral lidar system 有权

    公开(公告)号：US10094925B1

    公开(公告)日：2018-10-09

    申请号：US15943498

    申请日：2018-04-02

    Applicant: LUMINAR TECHNOLOGIES, INC.

    Inventor： Joseph G. LaChapelle

    IPC: G01C3/08 ,  G01S17/08 ,  H01L27/146 ,  G01S17/89 ,  G01S7/483 ,  G01S7/481

    Abstract: A multispectral lidar system includes a laser configured to emit a pulse of light including a first wavelength, scanner configured to direct the emitted pulse of light in accordance with a scan pattern, a receiver including a first detector and a second detector, and a controller. The first detector is configured to detect the emitted pulse of light scattered by a remote target, and the second detector is configured to detect light scattered or emitted by the remote target and including a second wavelength. The scanner provides, at any point in time, a fixed spatial relationship between the fields of view over which the light with the first wavelength and the second wavelength is received. A controller can determine a distance to the remote target and use this distance to modify a measurement of the property of the remote target based on the light detected by the second detector.

    LIDAR Transmitter and Detector System Using Pulse Encoding to Reduce Range Ambiguity
    18.
    发明申请
    LIDAR Transmitter and Detector System Using Pulse Encoding to Reduce Range Ambiguity 审中-公开

    公开(公告)号：US20180284279A1

    公开(公告)日：2018-10-04

    申请号：US15917628

    申请日：2018-03-10

    Applicant: LUMINAR TECHNOLOGIES, INC.

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

    IPC: G01S17/10 ,  G01S7/481 ,  G01S7/486 ,  G01S7/484

    Abstract: A lidar system includes a transmitter that encodes successive transmit pulses with different pulse characteristics and a receiver that detects the pulse characteristics of each received (scattered or reflected) pulse and that distinguishes between the received pulses based on the detected pulse characteristics. The lidar system thus resolves range ambiguities by encoding pulses of scan positions in the same or different scan periods to have different pulse characteristics, such as different pulse widths or different pulse envelope shapes. The receiver includes a pulse decoder configured to detect the relevant pulse characteristics of the received pulse and a resolver that determines if the pulse characteristics of the received pulse matches the pulse characteristics of the current scan position or that of a previous scan position.

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