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:
Aug. 20, 2024
Filed:
Jul. 10, 2023
Nikon Corporation, Tokyo, JP;
Kosuke Machida, Tokyo, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A zoom optical system comprises, in order from an object: a front lens group (GFS) having a positive refractive power; an Mlens group (GM) having a negative refractive power; an Mlens group (GM) having a positive refractive power; and an RN lens group (GRN) having a negative refractive power, wherein upon zooming, distances between the front lens group and the Mlens group, between the Mlens group and the Mlens group, and between the Mlens group and the RN lens group change, upon focusing from an infinite distant object to a short distant object, the RN lens group moves, and the Mlens group comprises an A lens group that satisfies a following conditional expression, 1.10<fvr/fTM2<2.00, where, fvr: a focal length of the A lens group, and fTM2: a focal length of the Mlens group in a telephoto end state.