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:
Aug. 07, 2012
Filed:
Aug. 01, 2008
Koichi Wakamiya, Tokyo, JP;
Koichi Wakamiya, Tokyo, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A wide-angle lens consists of, in order from an object, a front lens group GF consisting of a first front lens group GFthat consists of a negative meniscus lens Lhaving a concave surface facing an image, a second front lens group GFthat consists of a negative lens Lhaving a concave surface facing the image, and a third front lens group GFthat has a convex surface facing the object and has positive refractive power; and a rear lens group GB consisting of a first rear lens group GBthat consists of a cemented positive lens constructed by a negative lens Land a positive lens L, and a second rear lens group GBhaving positive refractive power; thereby providing a wide-angle lens having a wide angle of view, well corrected aberrations, less ghost images capable of coping with wide luminance difference, and an imaging apparatus equipped therewith.