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:
Aug. 23, 2011
Takamichi Kurashige, Funabashi, JP;
Saburo Masugi, Kawasaki, JP;
Takamichi Kurashige, Funabashi, JP;
Saburo Masugi, Kawasaki, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A zoom lens ZL comprising a first lens group Ghaving negative refractive power, a second lens group Ghaving positive refractive power, and a third lens group Ghaving positive refractive power, wherein the first lens group Gincludes a first lens having negative refractive power and a second lens which is a plastic lens having positive refractive power, the second lens group Gincludes a third lens having positive refractive power, a fourth lens having positive refractive power and a fifth lens having negative refractive power, the third lens group Gincludes a sixth lens having positive refractive power, and the conditional expressions: 1.50<(−f1)/fw<2.52, 0.4<(−f1)/fL2 <0.8, n2×n2×ν2<77.0 are satisfied respectively.