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:
Nov. 10, 2026
Filed:
Sep. 27, 2021
Nikon Corporation, Tokyo, JP;
Toshiyuki Shimada, Kawasaki, JP;
Nikon Corporation, Tokyo, JP;
Abstract
An optical system (OL) comprises a first lens group (G) having positive refractive power, an aperture stop (S), and a rear group (GR) that are arranged in order from the object side along an optical axis, the rear group (GR) comprising a first focusing lens group (GF) that moves along the optical axis during focusing, and a second focusing lens group (GF) that is disposed closer to the image side than the first focusing lens group (GF) and moves along the optical axis during focusing, and the optical system satisfies the following conditional expression. 0.03<D1/TL<0.25 where D1 is a distance on the optical axis from a lens surface closest to the object side to a lens surface closest to the image side in the first lens group (G), and TL is the entire length of the optical system (OL).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile