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:
Mar. 26, 2013
Filed:
Sep. 17, 2008
Keiko Mizuguchi, Kawasaki, JP;
Tomoki Ito, Kawasaki, JP;
Keiko Mizuguchi, Kawasaki, JP;
Tomoki Ito, Kawasaki, JP;
Nikon Corporation, Tokyo, JP;
Abstract
Providing a zoom lens system having a vibration reduction function capable of performing quick focusing with excellent optical performance even upon vibration reduction. The system including, in order from an object, a first lens group Ghaving positive refractive power, a second lens group Ghaving negative refractive power, a third lens group Ghaving positive refractive power, and a fourth lens group Ghaving positive refractive power. Upon zooming from a wide-angle end state to a telephoto end state, a distance between the first lens group Gand the second lens group Gvaries, and a distance between the second lens group Gand the third lens group Gvaries. The third lens group Gcarries out focusing from an infinity object to a close object. At least a portion of the fourth lens group Gmoves in a direction perpendicular to the optical axis.