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. 17, 2016
Filed:
Oct. 31, 2011
Applicant:
Haruo Sato, Kawaguchi, JP;
Inventor:
Haruo Sato, Kawaguchi, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 9/34 (2006.01); G02B 13/18 (2006.01); G02B 15/173 (2006.01);
U.S. Cl.
CPC ...
G02B 15/14 (2013.01); G02B 9/34 (2013.01); G02B 13/18 (2013.01); G02B 15/173 (2013.01); Y10T 29/49826 (2015.01);
Abstract
A zoom lens has, 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. Zooming is performed by changing an air gap between the lens groups. The fourth lens group (G) includes, in order from the object, a lens component (La) having positive or negative refractive power, a positive lens component (Lb), and a positive lens component (Lc) having a convex surface facing the object. Specified conditional expressions are satisfied.