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:
Jan. 17, 2017
Filed:
Mar. 23, 2015
Applicant:
Seiko Epson Corporation, Shinjuku-ku, JP;
Inventor:
Noriyuki Nakamura, Sakata, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/22 (2006.01); G01J 3/51 (2006.01); G01J 3/02 (2006.01); G02B 5/20 (2006.01); G02B 5/28 (2006.01); G02B 5/00 (2006.01);
U.S. Cl.
CPC ...
G01J 3/51 (2013.01); G01J 3/02 (2013.01); G01J 3/0289 (2013.01); G01J 3/513 (2013.01); G02B 5/003 (2013.01); G02B 5/201 (2013.01); G02B 5/285 (2013.01);
Abstract
An angle restriction filter that allows light incident thereon in a predetermined range of incident angles to pass, includes: an optical path wall section formed from a plurality of light shield members laminated in layers including a common material, thereby forming an optical path in a lamination direction of the light shield members; and a light transmission section formed in a region surrounded by the optical path wall section.