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. 03, 2016
Filed:
Apr. 26, 2011
Applicant:
Daisaku Arai, Kawasaki, JP;
Inventor:
Daisaku Arai, Kawasaki, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 15/173 (2006.01);
U.S. Cl.
CPC ...
G02B 15/173 (2013.01);
Abstract
A zoom lens having, in order from an object: a first lens group G1 having positive refractive power; a second lens G2 group having negative refractive power; a third lens group G3 having positive refractive power; and a fourth lens group G4 having positive refractive power, wherein the first lens group moves toward an image once then moves toward the object upon zooming from a wide-angle end state to a telephoto end state, and the following conditional expressions are satisfied:0.050</TL<0.1000.10</TL<0.800.10</LG2<0.64