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:
Feb. 25, 2025
Filed:
Sep. 29, 2023
Nikon Corporation, Tokyo, JP;
Kosuke Machida, Tokyo, JP;
Nikon Corporation, Tokyo, JP;
Abstract
A variable magnification optical system that comprises a first lens group having negative refractive power, a first intermediate lens group having positive refractive power, a second intermediate lens group, and a rear lens group having at least one focusing lens group which is moved upon carrying out focusing from an infinitely distant object to a closely distant object. The variable magnification optical system is constructed such that, upon varying a magnification from a wide angle end state to a telephoto end state, the first lens group is moved along the optical axis, a distance between the first lens group and the first intermediate lens group is varied, a distance between the first intermediate lens group and the second intermediate lens group is varied, a distance between the second intermediate lens group and the rear lens group is varied, and predetermined conditional expressions are satisfied.