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:
May. 26, 2010
Toshinori Take, Yokohama, JP;
Toshinori Take, Yokohama, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A lens system having, in order from an object, at least a first lens group Ghaving positive refractive power, and second to fourth lens groups Gto G, wherein the first lens group Gincludes a front portion lens group G, and a rear portion lens group Gwhich is disposed to an image side of the front portion lens group Gwith an air distance therebetween, and performs focusing by shifting the rear portion lens group Gin the optical axis direction, and the fourth lens group Gincludes, in order from the object, a negative lens and a positive lens (cemented negative lens L), a negative lens L, and an aperture stop S, and is fixed in the optical axis direction with respect to an image plane I upon zooming from a wide angle end state to a telephoto end state.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile