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:
Oct. 18, 2011
Filed:
Nov. 17, 2010
Shigehiko Matsunaga, Kanagawa, JP;
Koji Toyoda, Kanagawa, JP;
Shigehiko Matsunaga, Kanagawa, JP;
Koji Toyoda, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
Disclosed herein is a zoom lens including a first lens group, a second lens group, a third lens group, a fourth lens group, and a fifth lens group. The zoom lens satisfies following conditional expressions (1) and (2),0.03<1'/1<0.3  (1)0.3<|2|/√()<0.65  (2) where H′ is an interval from a vertex of a surface nearest to the image side in the first lens group to a principal point on the image side of the first lens group (− denotes the object side, and + denotes the image side), fis focal length of the first lens group, fis focal length of the second lens group, fw is focal length of an entire lens system at a wide-angle end, and ft is the focal length of the entire lens system at a telephoto end.