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. 21, 2012
Filed:
Oct. 21, 2010
Kazuteru Kawamura, Hachioji, JP;
Keitaro Yokoyama, Hachioji, JP;
Kazuteru Kawamura, Hachioji, JP;
Keitaro Yokoyama, Hachioji, JP;
Olympus Imaging Corp., Tokyo, JP;
Abstract
An imaging optical system has, in order from the object side to the image side thereof, a front lens group, an aperture stop, and a rear lens group. A lens located closest to object side in said front lens group always remains fixed in position, with satisfaction of the following conditions (1) and (2):1.15≦ω≦1.7   (1)−4.0≦≦−1.3   (2)where f is a focal length of the whole imaging optical system, fn is a focal length of a first negative lens in said front lens group, fb is a back focus of the imaging optical system upon focusing on an object point at infinity, and IHω is a distance from an optical axis of a position where a chief ray from a maximum incident half angle of view (ω) upon focusing on an object point at infinity is imaged at the imaging plane.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile