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:
Mar. 17, 2026
Filed:
Nov. 11, 2020
Nikon Corporation, Tokyo, JP;
Fumiaki Ohtake, Tokyo, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A variable-power optical system (ZL) is constituted by, in order from the object side and along the optical axis, the following: a first lens group (G) that has a positive refractive power; a second lens group (G); a third lens group (G) that has a negative refractive power; and a rear group (GR) that includes a plurality of lens groups. When power is varied from the wide-angle end to the telephoto end, the interval between the first lens group and the second lens group increases, the interval between the second lens group and the third lens group increases, and the interval between the third lens group and a lens group in the rear group positioned closest to the object decreases, thus satisfying the following conditional equation:0.10<1/2<1.80,