The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 19, 2023
Filed:
Mar. 12, 2020
Applicant:
Stmicroelectronics (Research & Development) Limited, Marlow, GB;
Inventor:
James Peter Drummond Downing, Doune, GB;
Assignee:
STMICROELECTRONICS (RESEARCH & DEVELOPMENT) LIMITED, Marlow, GB;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01S 7/481 (2006.01); G01S 17/894 (2020.01); G02B 5/02 (2006.01); G02B 27/48 (2006.01); H01S 5/42 (2006.01);
U.S. Cl.
CPC ...
G02B 27/48 (2013.01); G01S 7/4815 (2013.01); G01S 17/894 (2020.01); G02B 5/0221 (2013.01); G02B 5/0278 (2013.01); G02B 2207/101 (2013.01); H01S 5/423 (2013.01);
Abstract
A diffuse illumination system for reducing diffusion-related illumination inhomogeneities includes an array of vertical cavity surface emitting laser (VCSEL) emitters and a diffusing element including a transparent substrate and an array of nanostructures. A dimension and a shape of each nanostructure is configured to retard phases of two orthogonal polarization states of light incident on each nanostructure from the emitters for reducing illumination inhomogeneities in the output.