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:
Dec. 10, 2024
Filed:
Aug. 24, 2020
Nikon Corporation, Tokyo, JP;
Hiroshi Yabumoto, Yokohama, JP;
Nikon Corporation, Tokyo, JP;
Abstract
This zoom optical system (ZL(1)) has a plurality of lens groups (G-G), wherein when during zooming, distances between adjacent lens groups vary. The plurality of lens groups include: a first focused lens group (G) that moves during focusing; and a second focused lens group (G) that is disposed closer to an image plane side than the first focused lens group and moves during focusing along a trajectory that is different from that of the first focused lens group. The first focused lens group (G) and the second focused lens group (G) both have a negative refractive power and satisfy the following conditional expression, 0.40<fF1/fF2<6.00, where fF1: focal length of first focused lens group and fF2: focal length of second focused lens group.