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:
May. 09, 2017
Filed:
Nov. 02, 2012
Applicant:
Nikon Corporation, Chiyoda-ku, Tokyo, JP;
Inventor:
Takahiro Ishikawa, Kawasaki, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/16 (2006.01); G02B 9/34 (2006.01); G02B 15/173 (2006.01);
U.S. Cl.
CPC ...
G02B 15/16 (2013.01); G02B 9/34 (2013.01); G02B 15/173 (2013.01);
Abstract
Provided is a zoom lens having, in order from an object, a first lens group (G) having positive refractive power, a second lens group (G) having negative refractive power, a third lens group (G) having positive refractive power, and a fourth lens group (G) having positive refractive power, wherein the first lens group (G), the second lens group (G) and the third lens group (G) move along the optical axis for zooming, and the conditional expressions (1) and (2) are satisfied.8.000<β2/β2<12.000  (1)2.000<β3/β3<5.000  (2)