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:
Aug. 27, 2013
Filed:
Apr. 11, 2011
Masaharu Hosoi, Kanagawa, JP;
Hiroyuki Matsumoto, Wakayama, JP;
Masafumi Sueyoshi, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A zoom lens including first, second, and third lens groups having positive, negative, and positive refractive powers, respectively, which are arranged in that order from the object side to the image side such that, when zooming from wide-angle to telephoto, the first lens group moves to the object side, and spacings between the lens groups change. The third lens group has at least two lenses including a first lens, which is a positive lens arranged closer to the object side than the other lenses of the third lens group. Blur correction is performed by moving the first lens perpendicularly to the optical axis. The third lens group is configured such that the following conditional expression is satisfied: 0.3<(1−βkFW)·βkRW<1.9, where βkFW and βkRW are the lateral magnifications at wide-angle of, respectively, the first lens and the remaining lenses of the third lens group.