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:
Nov. 12, 2019
Filed:
Jan. 29, 2016
Nikon Corporation, Minato-ku, Tokyo, JP;
Hiroki Harada, Zushi, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A variable magnification optical system includes: a first lens group (G) having a negative refractive power; a second lens group (G) having a positive refractive power; an intermediate group (Gn) disposed closer to an image side than the second lens group (G); and a vibration-reduction lens group (VR) disposed closer to the image side than the intermediate group (Gn) and configured to be movable so as to have a component in a direction orthogonal to an optical axis. The system performs varying magnification by changing at least the distance between the first lens group (G) and the second lens group (G) and the distance between the second lens group (G) and the intermediate group (Gn), and the system satisfies Conditional Expression (1).1.500<β()<100.000  (1)