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:
Nov. 17, 2020
Filed:
Jan. 30, 2018
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Akira Sano, Shiojiri, JP;
Assignee:
Seiko Epson Corporation, , JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 5/28 (2006.01); G01J 3/51 (2006.01); G01J 3/26 (2006.01); G02B 26/00 (2006.01); G02B 26/08 (2006.01); G02B 6/293 (2006.01);
U.S. Cl.
CPC ...
G02B 5/28 (2013.01); G01J 3/26 (2013.01); G01J 3/51 (2013.01); G02B 26/001 (2013.01); G02B 26/0841 (2013.01); G02B 6/29358 (2013.01);
Abstract
A wavelength tunable interference filter includes a fixed substrate, a fixed reflection film that is provided on the fixed substrate, reflects part of incident light, and transmits at least part of the incident light, a movable reflection film that faces the fixed reflection film, reflects part of incident light, and transmits at least part of the incident light, and a fixed electrode that surrounds the fixed reflection film and has a light absorbing layer and a metal layer, and the light absorbing layer is disposed closer to the fixed substrate than the metal layer.