US 12,111,147 B2
Designing and constructing dot projectors for three-dimensional sensor modules
Olivier Ripoll, Bern (CH)
Assigned to AMS SENSORS SINGAPORE PTE. LTD., Singapore (SG)
Appl. No. 17/639,734
Filed by ams Sensors Singapore Pte. Ltd, Singapore (SG)
PCT Filed Sep. 3, 2020, PCT No. PCT/SG2020/050511
§ 371(c)(1), (2) Date Mar. 2, 2022,
PCT Pub. No. WO2021/045685, PCT Pub. Date Mar. 11, 2021.
Claims priority of provisional application 62/895,581, filed on Sep. 4, 2019.
Prior Publication US 2022/0290976 A1, Sep. 15, 2022
Int. Cl. G01B 11/25 (2006.01); G02B 27/42 (2006.01); G06V 10/98 (2022.01)
CPC G01B 11/2513 (2013.01) [G01B 11/254 (2013.01); G02B 27/425 (2013.01); G06V 10/993 (2022.01)] 10 Claims
OG exemplary drawing
 
1. A method comprising:
determining, for an optical dot projector having a plurality of light emitters, a relationship between locations of the plurality of light emitters with respect to a substrate of the optical dot projector and corresponding first locations of dots projected by the dot projector onto an imaging plane;
determining, based on the relationship, an optical grating approximating one or more optical characteristics of one or more optical elements of the optical dot projector;
determining second locations of dots corresponding to a replacement of the one or more optical elements of the optical dot projector by the optical grating;
determining, based on the second locations of dots, modified locations of the plurality of light emitters with respect to the substrate to reduce a distortion in a spatial pattern of the dots projected by the dot projector; and
constructing a plurality of optical dot projectors, each having a respective plurality of light emitters arranged according to the determined modified locations.