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. 26, 2013
Filed:
Sep. 12, 2011
Applicant:
Takashi Suzuki, Saitama, JP;
Inventor:
Takashi Suzuki, Saitama, JP;
Assignee:
Fujifilm Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 9/12 (2006.01); G02B 13/04 (2006.01); G02B 9/14 (2006.01);
U.S. Cl.
CPC ...
Abstract
A retrofocus-type wide angle lens includes a first lens group having negative refractive power as a whole, a second lens group having positive refractive power as a whole, a stop, and a third lens group having positive refractive power as a whole, which are arranged in this order from the object side of the retrofocus-type wide angle lens. Further, the first lens group includes two negative meniscus lenses, each having a convex surface facing the object side. Further, each of the second lens group and the third lens group includes a three-element cemented lens.