US 12,130,383 B2
Rotatable mirror device
Blaise Gassend, East Palo Alto, CA (US); David Duff, Portola Valley, CA (US); Paul Karplus, Redwood City, CA (US); Hui Son, Hayward, CA (US); and Alex Rivas, Sunnyvale, CA (US)
Assigned to Waymo LLC, Mountain View, CA (US)
Filed by Waymo LLC, Mountain View, CA (US)
Filed on Dec. 26, 2020, as Appl. No. 17/134,272.
Claims priority of provisional application 62/954,108, filed on Dec. 27, 2019.
Prior Publication US 2021/0199779 A1, Jul. 1, 2021
Int. Cl. G01S 7/48 (2006.01); G01D 5/14 (2006.01); G01S 7/481 (2006.01); G01S 17/08 (2006.01)
CPC G01S 7/4817 (2013.01) [G01D 5/14 (2013.01); G01S 17/08 (2013.01)] 20 Claims
OG exemplary drawing
 
12. A light detection and ranging (lidar) device, comprising:
a housing;
a mirror assembly disposed within the housing, wherein the mirror assembly comprises:
a shaft, wherein the shaft defines a rotational axis of the mirror assembly;
a plurality of reflective surfaces arranged about the rotational axis, wherein each reflective surface is defined by a reflective material; and
a rotatable baffle that defines a transmit side of the reflective surfaces and a receive side of the reflective surfaces;
a motor comprising a stator configured to rotate the mirror assembly about the rotational axis;
a transmitter configured to emit emission light into an environment of the lidar device via the transmit side of the reflective surfaces of the mirror assembly;
a receiver configured to detect return light that is received from the environment via the receive side of the reflective surfaces of the mirror assembly; and
a static baffle coupled to the housing, wherein an arrangement of the static baffle and the rotatable baffle is configured to reduce light leakage between the transmitter and the receiver, and wherein the static baffle and the rotatable baffle overlap in a direction perpendicular to the rotational axis.