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. 21, 2020
Filed:
Feb. 25, 2019
Applicant:
Seiko Epson Corporation, Tokyo, JP;
Inventors:
Masayuki Takagi, Azumino, JP;
Takashi Takeda, Suwa, JP;
Akira Komatsu, Kamiina-gun, JP;
Toshiaki Miyao, Matsumoto, JP;
Tokito Yamaguchi, Azumino, JP;
Assignee:
SIEKO EPSON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 27/28 (2006.01); G03B 21/28 (2006.01); G02B 5/30 (2006.01); G02B 27/01 (2006.01); G02B 17/08 (2006.01);
U.S. Cl.
CPC ...
G02B 27/28 (2013.01); G02B 5/30 (2013.01); G02B 17/086 (2013.01); G02B 27/0172 (2013.01); G03B 21/28 (2013.01); G02B 2027/011 (2013.01);
Abstract
A first lens and a second lens are bonded to each other and configured to be short in an optical axis direction. Further, by providing a half mirror in a bonding portion between a convex surface and a concave surface, power is given when folding an optical path, and additionally, by setting a refractive index of the first lens larger than a refractive index of the second lens, an image with a wide angle of view can be formed.