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:
Aug. 28, 2018
Filed:
Mar. 23, 2016
Applicant:
Yazaki Corporation, Tokyo, JP;
Inventor:
Junichi Matsushita, Shizuoka, JP;
Assignee:
YAZAKI CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/14 (2006.01); G02B 27/10 (2006.01); G02B 27/01 (2006.01); G02B 3/08 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0101 (2013.01); G02B 3/08 (2013.01); G02B 2027/011 (2013.01); G02B 2027/013 (2013.01); G02B 2027/0129 (2013.01);
Abstract
An optical device includes a plate-shaped Fresnel lens portion made of a first optical material, the Fresnel lens portion having a Fresnel-shaped portion on one side of Fresnel lens portion in a thickness direction of the Fresnel lens portion, the Fresnel-shaped portion having a plurality of grooves, and a partially reflective mirror layer provided on a surface of the Fresnel-shaped portion. The plurality of grooves of the Fresnel-shaped portion is configured such that a surface configuration of the Fresnel-shaped portion has optically freeform surface characteristics and such that each of the grooves has a non-uniform depth.