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:
Jul. 10, 2012
Filed:
Feb. 27, 2009
Shinichi Mitsuki, Kawasaki, JP;
Shinichi Mitsuki, Kawasaki, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A zoom lens of the present invention has a first lens group having negative refractive power, a second lens group having positive refractive power, and a third lens group having positive refractive power, which are disposed in order from an object, wherein the distances between each lens group are changed upon zooming, the second lens group has at least two positive lenses having an aspherical surface respectively, and when νd is an Abbe number at least one of the positive lenses having the aspherical surface satisfies a condition of the following expression: νd>70.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile