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:
May. 19, 2020
Filed:
Sep. 20, 2018
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Takeshi Shimizu, Chino, JP;
Shuichi Wakabayashi, Okaya, JP;
Assignee:
SEIKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/01 (2006.01); H04N 13/344 (2018.01); G02B 26/12 (2006.01); G02B 27/09 (2006.01); G02B 5/20 (2006.01); G02B 26/10 (2006.01);
U.S. Cl.
CPC ...
G02B 27/0172 (2013.01); G02B 5/205 (2013.01); G02B 26/101 (2013.01); G02B 26/12 (2013.01); G02B 27/0977 (2013.01); H04N 13/344 (2018.05); G02B 2027/0121 (2013.01);
Abstract
An optical attenuator, when damaged, loses not only a light attenuation function but also part of an optical path shift function utilizing a refractive effect, and thus an optical path shift function in a normal state is lost. Thus, it is possible to diverts an optical path of modulate light, which is a laser beam, from a direction toward a mirror surface, that is, a direction toward the eye of an observer.