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:
May. 26, 2020
Filed:
Sep. 06, 2016
Nikon Corporation, Minato-ku, Tokyo, JP;
Taku Matsuo, Kawasaki, JP;
Haruo Sato, Kawasaki, JP;
Nikon Corporation, Tokyo, JP;
Abstract
The art has, disposed in order from an object, a first lens group (G) having positive refractive power, a second lens group (G) having negative refractive power, a third lens group (G) having negative refractive power, and a fourth lens group (G) having positive refractive power, in which zooming is made by varying an air distance between the first lens group (G) and the second lens group (G), and the following conditional expression (1) is satisfied:0.60<4/<1.15  (1)where f4 denotes a focal distance of the fourth lens group (G), and fw denotes a focal distance of a zoom lens in a wide-angle end state upon focusing on infinity.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile