US 12,298,399 B2
Receive path for LiDAR system
Jim Li, Los Altos, CA (US); Yimin Li, Los Altos, CA (US); and Junwei Bao, Los Altos, CA (US)
Assigned to SEYOND, INC., Sunnyvale, CA (US)
Filed by Innovusion Ireland Limited, Los Altos, CA (US)
Filed on Feb. 22, 2019, as Appl. No. 16/283,563.
Claims priority of provisional application 62/634,084, filed on Feb. 22, 2018.
Prior Publication US 2019/0257924 A1, Aug. 22, 2019
Int. Cl. G01S 17/89 (2020.01); G01S 7/481 (2006.01); G01S 17/10 (2020.01)
CPC G01S 17/89 (2013.01) [G01S 7/4816 (2013.01); G01S 7/4818 (2013.01); G01S 17/10 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A light detection and ranging (LiDAR) system comprising:
a light source configured to generate a pulse signal from the LiDAR system;
one or more mirrors configured to steer a returned light pulse associated with the transmitted pulse signal along an optical receive path wherein the one or more mirrors include a polygon scanner configured to rotate about an axis;
a field lens positioned along the optical receive path, wherein the field lens is configured to redirect the returned light pulse to within a predetermined area;
a fiber having a fiber core and a receiving end having a cross-sectional area that is equal to or greater than the predetermined area, and configured to receive the redirected returned light pulse from the field lens into the fiber core along the optical receive path wherein the fiber is configured to receive the redirected returned light pulse along a unidirectional receive path; and
a light detector configured to receive the returned light pulse from an end of the fiber core opposite the receiving end, wherein the light detector receives the returned light pulse through a coupling optic wherein a detecting area of the light detector is approximately equal to or smaller than the cross-sectional area of the fiber core.