US 10,890,442 B1
Structured light projector and method for structured light projection using the same
Ching-Wen Wang, Tainan (TW); Cheng-Che Tsai, Tainan (TW); Wu-Feng Chen, Tainan (TW); and Hsueh-Tsung Lu, Tainan (TW)
Assigned to HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed by HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed on Dec. 26, 2019, as Appl. No. 16/726,955.
Int. Cl. G01B 11/25 (2006.01); G02B 27/42 (2006.01); G03B 21/14 (2006.01); G06T 7/521 (2017.01)
CPC G01B 11/25 (2013.01) [G02B 27/4205 (2013.01); G03B 21/14 (2013.01); G06T 7/521 (2017.01)] 15 Claims
OG exemplary drawing
 
1. A structured light projector, comprising:
a projection module configured to project an optical pattern, the projection module comprising:
a light source configured to generate a light beam; and
a diffractive optical element (DOE) configured to convert the light beam into the optical pattern;
a liquid crystal (LC) lens disposed over the projection module, the LC lens configured to focus the optical pattern onto a region of space; and
a processor configured to generate a control signal depending on an environment temperature of the projection module for controlling the LC lens.