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. 06, 2008
Filed:
May. 19, 2006
Motoyuki Otake, Saitama, JP;
Motoyuki Otake, Saitama, JP;
Sony Corporation, , JP;
Abstract
A zoom lens wherein the image plane movement upon lens shifting is minimized. A power variation section and a final lens group are disposed in order from an object side. The power variation section includes at least two lens groups movable in an optical axis direction to vary a lens position state. The final lens group is fixed in the optical axis direction and includes first to third sub groups having negative, positive and positive refracting powers and disposed in order from the object side. The second sub group is shiftable substantially perpendicularly to the optical axis to shift an image. A conditional expression 0.2<ft/fBt<0.8 is satisfied where ft and fBt are the focal distances of the lens system and entire lens groups disposed on the object side of the third sub group in the telephoto end state.