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:
Mar. 18, 2014
Filed:
Apr. 26, 2011
Yasunori Touchi, Osaka, JP;
Takakazu Bito, Osaka, JP;
Shinji Yamaguchi, Osaka, JP;
Panasonic Corporation, Kadoma-shi, JP;
Abstract
A zoom lens system comprising a first lens unit having positive optical power, a second lens unit having negative optical power, a third lens unit having positive optical power, a fourth lens unit having negative optical power, and a fifth lens unit having positive optical power, wherein the third lens unit includes at least one lens element having positive optical power and at least one lens element having negative optical power, at least the first to third lens units are moved along an optical axis in zooming so that air spaces between the respective lens units vary, thereby performing magnification change, a lens unit positioned on the image side relative to an aperture diaphragm is moved along the optical axis in focusing, and the conditions: 8.1<f/Ir<10.4 and Z=f/f≧9.0 (f: a composite focal length of the first lens unit, Ir=f×tan(ω), ω: a half view angle at a telephoto limit, fand f: focal lengths of the entire system at a telephoto limit and at a wide-angle limit) are satisfied; an imaging device; and a camera are provided.