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. 07, 2015
Filed:
Apr. 27, 2011
Applicant:
Toshinori Take, Yokohama, JP;
Inventor:
Toshinori Take, Yokohama, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 9/04 (2006.01); G02B 13/00 (2006.01);
U.S. Cl.
CPC ...
G02B 13/0045 (2013.01); G02B 13/006 (2013.01);
Abstract
An imaging lens including, in order from an object side: a first lens group Ghaving positive refractive power; and a second lens group Ghaving positive refractive power, a position of the first lens group Gbeing fixed with respect to an image plane, the second lens group Gconsisting of a plurality of lens components, and given conditional expression being satisfied, thereby providing a compact imaging lens imaging lens having a large aperture and a wide angle of view and excellent optical performance over entire image frame with excellently correcting various aberrations upon focusing on an infinity object to a close object.