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. 05, 2013
Filed:
Aug. 05, 2009
Mami Muratani, Tokyo, JP;
Haruo Sato, Kawaguchi, JP;
Mami Muratani, Tokyo, JP;
Haruo Sato, Kawaguchi, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A zoom lens system ZL installed in an electronic still cameraand the like comprising, in order from an object side: a first lens group Ghaving negative refractive power; and a second lens group Ghaving positive refractive power; the second lens group including at least two cemented lenses each of which includes a positive lens disposed to the object side and a negative lens disposed to an image side, a distance between the first lens group and the second lens group varying upon zooming from a wide-angle end state to a telephoto end state, thereby providing a zoom lens system having excellent optical performance, an optical apparatus equipped with the zoom lens system, and a method for manufacturing the zoom lens system.