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:
Oct. 15, 2019
Filed:
Feb. 27, 2018
Applicant:
Panasonic Intellectual Property Management Co., Ltd., Osaka, JP;
Inventors:
Tsuneo Uchida, Kanagawa, JP;
Katsu Yamada, Osaka, JP;
Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/28 (2006.01); G02B 13/16 (2006.01); G02B 17/08 (2006.01); G03B 21/00 (2006.01); G03B 21/14 (2006.01); H04N 5/74 (2006.01); G02B 13/18 (2006.01);
U.S. Cl.
CPC ...
G03B 21/28 (2013.01); G02B 13/16 (2013.01); G02B 17/08 (2013.01); G03B 21/00 (2013.01); G03B 21/14 (2013.01); H04N 5/74 (2013.01); G02B 13/18 (2013.01);
Abstract
A projection optical system is an optical system for projecting an image light flux formed in an image display element onto a projection surface, and includes a transmission optical system and a reflection optical system. The transmission optical system is located on an emission surface side of the image display element and includes a stop and a plurality of lenses. The reflection optical system includes a positive-power first mirror and a second mirror. Conditional Expression (1) is satisfied0<<10  (1)where