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, 2014
Filed:
Feb. 01, 2013
Panasonic Corporation, Osaka, JP;
Shunichiro Yoshinaga, Osaka, JP;
Kyoichi Miyazaki, Osaka, JP;
Takao Yamanaka, Osaka, JP;
Keiichi Zaitsu, Osaka, JP;
Panasonic Corporation, Osaka, JP;
Abstract
A single focal length lens system comprising: at least a front lens unit having positive or negative power, and being fixed in focusing; a focusing lens unit having positive power, and moving along an optical axis in focusing; and a rear lens unit having negative power, and being fixed in focusing, wherein the focusing lens unit includes: a cemented lens of a negative lens and a positive lens; and a positive single lens located on the image side relative to the cemented lens and having an aspheric surface, the rear lens unit is composed of one single lens, and the condition: −0.5<f/f<−0.1 (f, f: focal lengths of the entire single focal length lens system, the rear lens unit) is satisfied.