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:
Jan. 13, 2015
Filed:
Nov. 02, 2010
Akira Yamagami, Kawasaki, JP;
Toshinori Take, Yokohama, JP;
Akira Yamagami, Kawasaki, JP;
Toshinori Take, Yokohama, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An optical system includes, in order from an object side: a first lens group Ghaving negative refractive power; and a second lens group Ghaving positive refractive power; upon zooming from a wide-angle end state W to a telephoto end state T, a distance between the first lens group Gand the second lens group Gvarying, and the second lens group Gmoving, and the second lens group Gincluding a focusing lens group Gf that carries out focusing from an infinity object to a close object, and a decentering lens group Gs that is movable in a direction having a component perpendicular to an optical axis, thereby providing an optical system capable of establishing both of internal focusing and a decentering lens group with obtaining compactness and excellent optical performance, an optical apparatus equipped with the optical system, and a method for manufacturing the optical system.