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:
Feb. 08, 2011
Filed:
Dec. 31, 2008
Tomoyuki Satori, Kawagoe, JP;
Tomoyuki Satori, Kawagoe, JP;
Olympus Imaging Corp., Tokyo, JP;
Abstract
A zoom lens includes, in order from the object side thereof, a first lens unit Ghaving a positive refracting power, a second lens unit Ghaving a negative refracting power, and a third lens unit Ghaving a positive refracting power, wherein zooming is performed by changing distances between the lens units, the second lens unit has two negative lens elements and one positive lens element, and the lens element located closest to the object side is a negative lens element. The zoom lens satisfies the following conditions:0.60<Σ<1.95  (1-1) and1.830<N<2.000  (1-2),where the term 'lens element' refers to an optical member that satisfies 0.1<L/I.