US 10,890,839 B1
Structured light imaging device
Ching-Wen Wang, Tainan (TW); Cheng-Che Tsai, Tainan (TW); Tsai-Hsing Chen, Tainan (TW); Seng-Yu Huang, Tainan (TW); Wei-Cheng Lu, Tainan (TW); and Hsueh-Tsung Lu, Tainan (TW)
Assigned to HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed by HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed on Nov. 6, 2019, as Appl. No. 16/676,407.
Int. Cl. G01B 11/25 (2006.01); G03B 21/20 (2006.01); G03B 21/14 (2006.01); G03B 21/00 (2006.01)
CPC G03B 21/208 (2013.01) [G01B 11/2513 (2013.01); G03B 21/142 (2013.01); G03B 21/2033 (2013.01); G03B 21/005 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A structured light imaging device, comprising:
a projector comprising a diffractive optical element;
an image sensor; and
a processing circuit electrically connected to the projector and the image sensor,
wherein the processing circuit is configured to control the projector to emit a beam having a special pattern, and alter an amplitude of the beam in a random way during a sensing period,
wherein the image sensor is configured to capture an image corresponding to the beam during the sensing period, and transmits the image to the processing circuit,
wherein the processing circuit calculates a depth according to the image and a predetermined image having the special pattern.