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:
Jul. 14, 2015
Filed:
Dec. 06, 2013
Panasonic Corporation, Kadoma-shi, Osaka, JP;
Yusuke Yonetani, Osaka, JP;
Yoshio Matsumura, Osaka, JP;
Satoshi Kuzuhara, Hyogo, JP;
Tomoko Iiyama, Osaka, JP;
Masafumi Sueyoshi, Kanagawa, JP;
Abstract
An inner focus lens system comprising lens units each composed of at least one lens element, wherein a most object side lens unit is provided and is fixed with respect to an image surface in focusing, and the conditions: BF/Y<1.7 and (L×F)/f<2.2 (BF: a distance from an image side surface apex of a most image side lens element to the image surface, Y=f ×tan ω, L: an overall length of lens system, F: a F-number of lens system,f: a focal length of lens system, ω: a half view angle of lens system) are simultaneously satisfied, or only the condition: (L×F)/f<2.0 (L: the overall length of lens system, F: the F-number of lens system,f: the focal length of lens system) is satisfied.