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:
Jun. 14, 2022
Filed:
Sep. 22, 2021
Applicant:
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Inventors:
Shumpei Nishio, Tokyo, JP;
Makio Kurashige, Tokyo, JP;
Assignee:
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F21S 41/00 (2018.01); F21S 41/16 (2018.01); F21S 41/20 (2018.01); G02B 5/18 (2006.01); G02B 5/32 (2006.01); G03H 1/00 (2006.01); G03H 1/16 (2006.01);
U.S. Cl.
CPC ...
F21S 41/16 (2018.01); F21S 41/285 (2018.01); G02B 5/18 (2013.01); G02B 5/32 (2013.01); G03H 1/0005 (2013.01); G03H 1/16 (2013.01); G03H 2226/02 (2013.01); G03H 2260/12 (2013.01);
Abstract
An illumination device includes: laser light sources having different radiant fluxes; and diffractive optical elements provided correspondingly to the respective laser light sources. A planar dimension of the diffractive optical element, which corresponds to the laser light source that emits a laser light having a minimum radiant flux, is smaller than a planar dimension of the diffractive optical element, which corresponds to the laser light source that emits a laser light having a maximum radiant flux.