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. 21, 2017
Filed:
Jun. 06, 2016
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventor:
Takahiro Takizawa, Suzaka, JP;
Assignee:
Seiko Epson Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/16 (2006.01); G02B 7/18 (2006.01); G03B 21/20 (2006.01);
U.S. Cl.
CPC ...
G03B 21/16 (2013.01); G02B 7/1815 (2013.01); G03B 21/2013 (2013.01); G03B 21/2066 (2013.01);
Abstract
An optical path changing device includes: a reflective member that reflects a light beam incident thereto, in a predetermined reflection direction; and a housing holding the reflective member. The housing has a first surface and a second surface with the reflective member interposed therebetween in a direction orthogonal to the reflection direction. The first surface and the second surface have openings, respectively, and a cooling gas is circulated from the opening in the first surface to the opening in the second surface.