US 12,313,784 B2
Half and quarter lissajous scan patterns for LiDAR
Dongyi Liao, Mountain View, CA (US); Jun Pei, Saratoga, CA (US); and Mark A. McCord, Los Gatos, CA (US)
Assigned to Cepton Technologies, Inc., San Jose, CA (US)
Filed by Cepton Technologies, Inc., San Jose, CA (US)
Filed on Dec. 23, 2020, as Appl. No. 17/133,355.
Claims priority of provisional application 62/955,359, filed on Dec. 30, 2019.
Prior Publication US 2021/0199778 A1, Jul. 1, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. G01S 7/481 (2006.01); G01S 17/894 (2020.01)
CPC G01S 7/4817 (2013.01) [G01S 17/894 (2020.01)] 20 Claims
OG exemplary drawing
 
1. A scanning LiDAR system comprising:
a fixed frame;
a first platform;
an electro-optic assembly mounted on the first platform, the electro-optic assembly including one or more laser sources and one or more detectors, each respective detector corresponding a respective laser source;
a flexure assembly flexibly coupling the first platform to the fixed frame;
a drive mechanism configured to, via the flexure assembly, translate the first platform with respect to the fixed frame in two dimensions in a plane substantially perpendicular to an optical axis of the scanning LiDAR system; and
a controller coupled to the drive mechanism, the controller configured to:
cause the drive mechanism to translate the first platform in a first direction with a first frequency and in a second direction orthogonal to the first direction with a second frequency that is different from the first frequency; and
acquire a point cloud using the one or more laser sources and the one or more detectors while the first platform is being translated; and
output the point cloud at a frame rate that is an integer times a difference between the second frequency and the first frequency, the integer being greater than one.