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:
Aug. 06, 2013
Filed:
Apr. 06, 2012
Takuya Imaoka, Kanagawa, JP;
Koji Hoshi, Kanagawa, JP;
Hitoshi Hagimori, Nara, JP;
Panasonic Corporation, Kadoma-shi, JP;
Abstract
An inner focus lens, in order from an object side to an image side, comprising: a first lens unit having positive optical power; a second lens unit having negative optical power; and a third lens unit having positive optical power, wherein the second lens unit is moved along an optical axis so that focusing from an infinite-distance object side to a short-distance object side is achieved, the first lens unit includes a bi-convex air lens, and the following conditions: 0.65<|f/f|<5.00 and 0.5<f/f<9.0 (f: a focal length of the second lens unit, f and f: a focal length of the entire system and a composite focal length of the second and third lens units in an infinity in-focus condition, f: a focal length of the first lens unit) are satisfied; an interchangeable lens apparatus; and a camera system are provided.