公开(公告)号：US10451716B2

公开(公告)日：2019-10-22

申请号：US15958749

申请日：2018-04-20

Applicant: LUMINAR TECHNOLOGIES, INC.

Inventor： John Hughes ,  Nicholas Ventola ,  Sean P. Hughes

IPC: G01S7/497 ,  G01D5/34 ,  G01S7/481 ,  G05D1/00 ,  G05D1/02 ,  G01S17/93 ,  G01S17/42 ,  G01S17/89

Abstract: A lidar system comprises a light source to emit pulses of light, a scanner, a receiver, and a controller. The scanner includes a rotatable polygon mirror with reflective surfaces, the reflective surfaces being angularly offset from one another along a periphery of the block. The scanner further includes a polygon mirror axle extending into the block, about which the block rotates, a rotary encoder having a rotational component with an axis of rotation aligned with the polygon mirror axle, the rotational component having one or more characteristics configured to cause the rotary encoder to return a signal, and a second mirror pivotable along an axis orthogonal to the polygon mirror axle. The controller is configured to determine a rotational parameter of the polygon mirror in response to the signal returned from the rotary encoder.

公开(公告)号：US20190154816A1

公开(公告)日：2019-05-23

申请号：US15958749

申请日：2018-04-20

Applicant: LUMINAR TECHNOLOGIES, INC.

Inventor： John Hughes ,  Nicholas Ventola ,  Sean P. Hughes

IPC: G01S7/497 ,  G01D5/34 ,  G01S7/481 ,  G01S17/93 ,  G05D1/00 ,  G05D1/02

CPC classification number: G01S7/497 ,  G01D5/34 ,  G01S7/4817 ,  G01S17/42 ,  G01S17/89 ,  G01S17/936 ,  G05D1/0061 ,  G05D1/0231 ,  G05D2201/0213

Abstract: A lidar system comprises a light source to emit pulses of light, a scanner, a receiver, and a controller. The scanner includes a rotatable polygon mirror with reflective surfaces, the reflective surfaces being angularly offset from one another along a periphery of the block. The scanner further includes a polygon mirror axle extending into the block, about which the block rotates, a rotary encoder having a rotational component with an axis of rotation aligned with the polygon mirror axle, the rotational component having one or more characteristics configured to cause the rotary encoder to return a signal, and a second mirror pivotable along an axis orthogonal to the polygon mirror axle. The controller is configured to determine a rotational parameter of the polygon mirror in response to the signal returned from the rotary encoder.