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. 07, 2014
Filed:
Sep. 16, 2011
Shunichiro Yoshinaga, Hyogo, JP;
Isamu Izuhara, Osaka, JP;
Kyoichi Miyazaki, Osaka, JP;
Takuya Imaoka, Kanagawa, JP;
Shunichiro Yoshinaga, Hyogo, JP;
Isamu Izuhara, Osaka, JP;
Kyoichi Miyazaki, Osaka, JP;
Takuya Imaoka, Kanagawa, JP;
Panasonic Corporation, Osaka, JP;
Abstract
Compact and lightweight zoom lens systems having less aberration fluctuation in association with focusing, lens barrels, interchangeable lens apparatuses, and camera systems are provided. The zoom lens system comprises: a first lens unit having positive optical power; a first focusing lens unit which is located on an image side relative to the first lens unit, has negative optical power, and moves along an optical axis in zooming and focusing; and a second focusing lens unit which is located on the image side relative to the first focusing lens unit, has positive optical power, and moves along the optical axis in the zooming and the focusing, and satisfies the condition: |d/d|<1.0 (d: an amount of movement of the first focusing lens unit in focusing at a telephoto limit, d: an amount of movement of the second focusing lens unit in focusing at a telephoto limit).