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:
Jan. 26, 2010
Filed:
Apr. 25, 2007
Daisuke Kuroda, Kanagawa, JP;
Daisuke Kuroda, Kanagawa, JP;
Sony Corporation, Tokyo, JP;
Abstract
A zoom lens including a plurality of lens groups and varying magnification by changing a distance between lens groups, wherein a last lens group positioned on an image side closest thereto with a negative part group having negative refractive power and a positive part group arranged adjacent on the image side thereof and having positive refractive power, wherein the positive part group is shifted in a direction vertical to an optical axis to shift an image, and Equations (1) and (2) are satisfied,−0.30</()<−0.05  (1)ν>30  (2)where, fgn: focal length of the negative part group, Ngn: average refractive index of the negative part group, fT: focal length of the entire system at a telephoto end, νgn: composite Abbe number of the negative part group, and νgis: composite Abbe number of the positive part group.