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. 06, 2013
Filed:
Jul. 13, 2009
Susumu Sato, Yotsukaido, JP;
Susumu Sato, Yotsukaido, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A zoom lens ZL, which is mounted on an electronic still cameraor the like, is composed of, in order from the object side, a first lens unit Ghaving a positive refractive power, a second lens unit Ghaving a negative refractive power, a third lens unit Ghaving a positive refractive power, a fourth lens unit Ghaving a negative refractive power, and a fifth lens unit Ghaving a positive refractive power. The first lens unit Ghas, in order from the object side, a negative meniscus lens with a convex surface on the object side, and a positive lens, and the second lens unit Ghas, in order from the object side, a negative meniscus lens with a convex surface on the object side, a biconcave lens, and a positive lens. The zoom lens satisfies a condition of the following expression:0.005<(−2)×3/(1)<0.023,