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    Concurrent scan of multiple pixels in a lidar system equipped with a polygon mirror
    41.
    发明授权
    Concurrent scan of multiple pixels in a lidar system equipped with a polygon mirror 有权

    公开(公告)号：US10310058B1

    公开(公告)日：2019-06-04

    申请号：US15965288

    申请日：2018-04-27

    Applicant: LUMINAR TECHNOLOGIES, INC.

    Inventor： Scott R. Campbell ,  Jason M. Eichenholz ,  Matthew D. Weed ,  Lane A. Martin

    IPC: G01C3/08 ,  G01S7/481 ,  G02B26/10 ,  G01S17/93

    Abstract: A lidar system includes one or more light sources configured to generate a first and second beams of light, a scanner configured to synchronously scan a field of regard of the lidar system using the two beams, and a receiver configured to detect light of the two beams scattered by one or more remote targets. 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; a polygon mirror axle extending into the block, about which the block rotates; optical elements configured to direct the first and second beams of light respectively to two adjacent reflective surfaces of the rotatable polygon mirror; and a second mirror pivotable along an axis orthogonal to the polygon mirror axle.

    REDUCING AUDIO NOISE IN A LIDAR SCANNER WITH A POLYGON MIRROR
    42.
    发明申请
    REDUCING AUDIO NOISE IN A LIDAR SCANNER WITH A POLYGON MIRROR 审中-公开

    公开(公告)号：US20190154829A1

    公开(公告)日：2019-05-23

    申请号：US15965471

    申请日：2018-04-27

    Applicant: LUMINAR TECHNOLOGIES, INC.

    Inventor： John E. McWhirter ,  Scott R. Campbell

    IPC: G01S17/08 ,  G02B26/12 ,  G02B27/10 ,  G02B27/30 ,  H01L25/16 ,  G02B26/10 ,  H01L27/146

    Abstract: An optical scanner includes a rotatable polygon mirror and a second mirror. The rotatable polygon mirrors includes 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; a polygon mirror axle extending into the block through at least one of the first and second walls, about which the block rotates; a motor driving rotation of the block; and chamfers in the block, each of the chamfers being bounded by a pair of adjacent reflective surfaces and the second wall. The second mirror is pivotable along an axis orthogonal to the polygon mirror axle and more proximate to the second wall of the block than the first wall of the block.

    Increasing Operational Safety of a Lidar System
    44.
    发明申请
    Increasing Operational Safety of a Lidar System 审中-公开

    公开(公告)号：US20180284247A1

    公开(公告)日：2018-10-04

    申请号：US15938650

    申请日：2018-03-28

    Applicant: LUMINAR TECHNOLOGIES, INC

    Inventor： Scott R. Campbell ,  Jason M. Eichenholz

    IPC: G01S7/497 ,  G01S17/93 ,  G01S17/10 ,  G01S7/48 ,  G01S7/481

    Abstract: A light-based detection system includes a light source configured to emit light as a series of one or more light pulses, a transmitter configured to direct the one or more light pulses toward a remote target located a distance from the system, a receiver configured to detect a light pulse scattered by the remote target, and a controller. The pulses are at a wavelength between approximately 1400 nanometers and approximately 1600 nanometers, with pulse duration between 10 picoseconds and 20 nanoseconds and a pulse energy less than 2 microjoules. The controller is configured to determine the distance from the system to the target based on a time of flight for the detected light pulse, detect a fault condition indicating that the distance to the target is less than a threshold distance, and shut down the light source in response to detecting the fault condition.

    Method for Controlling Peak and Average Power Through Laser Receiver
    45.
    发明申请
    Method for Controlling Peak and Average Power Through Laser Receiver 审中-公开

    公开(公告)号：US20180284239A1

    公开(公告)日：2018-10-04

    申请号：US15940249

    申请日：2018-03-29

    Applicant: LUMINAR TECHNOLOGIES, INC.

    Inventor： Joseph G. LaChapelle ,  Scott R. Campbell ,  Stephen D. Gaalema

    IPC: G01S7/486 ,  G01S17/10

    Abstract: A lidar system includes a light source configured to emit light pulses and a receiver configured to detect light from some of the light pulses scattered by remote targets. The receiver includes an avalanche photodiode operating in the linear mode for detecting the light pulses. To prevent damage to the linear mode avalanche photodiode a quench circuit is coupled to the avalanche photodiode, where the quench circuit reduces a bias voltage applied to the avalanche photodiode, when an avalanche event occurs at the avalanche photodiode.

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