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:
Sep. 13, 2016
Filed:
Sep. 17, 2014
Applicant:
Fujifilm Corporation, Tokyo, JP;
Inventors:
Tomoyuki Baba, Saitama-ken, JP;
Masanao Kawana, Saitama-ken, JP;
Masaru Amano, Saitama-ken, JP;
Takeshi Kamiya, Saitama-ken, JP;
Assignee:
FUJIFILM Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03B 21/28 (2006.01); G02B 15/173 (2006.01); G02B 15/177 (2006.01); G02B 13/16 (2006.01); G02B 17/08 (2006.01);
U.S. Cl.
CPC ...
G03B 21/28 (2013.01); G02B 13/16 (2013.01); G02B 15/173 (2013.01); G02B 15/177 (2013.01); G02B 17/08 (2013.01);
Abstract
In a projection optical system that projects an image displayed on an image display device arranged on a reduction-side conjugate plane onto a magnification-side conjugate plane, as a magnified image, the projection optical system includes a refractive optical system and a reflective optical system having negative refractive power in this order from a reduction side. Further, the following conditional formula (1) is satisfied:−0.0015≦(1/tan(ωmax)−0.16)×(θL/θM−0.27)   (1).