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:
Apr. 26, 2016
Filed:
Jan. 16, 2013
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Assignee:
Seiko Epson Corporation, , JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 5/28 (2006.01); G01J 1/04 (2006.01); G02B 5/08 (2006.01); G02B 26/00 (2006.01);
U.S. Cl.
CPC ...
G02B 5/284 (2013.01); G01J 1/0488 (2013.01); G02B 5/0808 (2013.01); G02B 26/001 (2013.01);
Abstract
An interference filter includes first and second reflecting films opposed to each other across a gap, the first and second reflecting films include an Ag—Sm—Cu alloy film or an Ag—Bi—Nd alloy film, the Ag—Sm—Cu alloy film includes 0.1 atomic %≦Sm≦0.5 atomic %, and 0.1 atomic %≦Cu and ≦0.5 atomic %, and Sm+Cu≦1.0 atomic %, the Ag—Bi—Nd alloy film includes 0.1 atomic %≦Bi≦3.0 atomic %, and 0.1 atomic %≦Nd≦5.0 atomic %, and the thickness of the Ag—Sm—Cu alloy film or the Ag—Bi—Nd alloy film is ≧10 nm and ≦40 nm.