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. 05, 2013
Filed:
Sep. 13, 2011
Ryosuke Uemura, Hachioji, JP;
Ryosuke Uemura, Hachioji, JP;
Olympus Corporation, Tokyo, JP;
Abstract
An imaging optical system has, in order from an object side to an image side, a first lens group, an aperture stop, a second lens group and a third lens group. A first lens, in said third lens group, is movable along an optical axis thereby implementing focusing from a focusing-on-infinity state to a focusing-on-a-near-distance state, with satisfaction of:||<1  (1)−6.0<()/()<3.5  (2)where fis the combined focal length of the second lens group and the third lens group upon focusing on infinity; fis the focal length of the first lens group; Ris the axial radius of curvature of the surface of the most image side of a negative lens component of the third lens group; and Ris the axial radius of curvature of the surface of the most object side of said lens component of the third lens group.