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:
Jul. 12, 2022
Filed:
Sep. 06, 2019
Nikon Corporation, Tokyo, JP;
Akihiko Obama, Tokyo, JP;
Kensuke Uchida, Fujisawa, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A first lens group (G) having positive refractive power, a second lens group (G) having negative refractive power, a third lens group (G) having positive refractive power, a fourth lens group (G) having positive refractive power, a fifth lens group (G) are arranged in order from an object, and a distance between the first lens group (G) and the second lens group (G), a distance between the second lens group (G) and the third lens group (G), a distance between the third lens group (G) and the fourth lens group (G), and a distance between the fourth lens group (G) and the fifth lens group (G) change upon zooming, and a lens group arranged closest to an image is approximately fixed against an image surface (I) upon zooming, and the third lens group (G) moves along the optical axis upon focusing, and the following expression (1) is satisfied.  ()