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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.:

US 12461350 B1

PDFFull Text
Date of Patent:
Nov. 04, 2025

Filed:

Aug. 26, 2020

Optical system, optical apparatus and method for manufacturing the optical system, and zoom optical system, optical apparatus and method for manufacturing the zoom optical system

Applicant:

Nikon Corporation, Tokyo, JP;

Inventors:

Masashi Yamashita, Tokyo, JP;

Tomoki Ito, Kawasaki, JP;

Tomonori Kuribayashi, Yokohama, JP;

Keigo Koida, Kawasaki, JP;

Satoshi Miwa, Yokohama, JP;

Yoko Komatsubara, Yokohama, JP;

Katsuya Watanabe, Yokohama, JP;

Azuna Nonaka, Yokohama, JP;

Ayumu Makida, Kawaguchi, JP;

Assignee:

Nikon Corporation, Tokyo, JP;

Attorney:

Potomac Law Group, PLLC

Primary Examiner:

Jack Dinh

Int. Cl.
CPC ...
G02B 15/14 (2006.01);
U.S. Cl.
CPC ...
G02B 15/145523 (2019.08);
Abstract

An optical system (LS) has an aperture stop (S), and a positive lens (L) disposed closer to the object side than the aperture stop (S). The positive lens (L) satisfies the following conditional expressions.−0.010<1−(2.015−0.0068×ν1)50.00<ν1<65.000.545<θ1−0.010<θ1−(0.6418−0.00168×ν1)where ndP1 is the refractive index to the d line of the positive lens, νdP1 is the Abbe number with respect to the d line of the positive lens, and θgFP1 is the partial dispersion ratio of the positive lens.

Find Patent Forward Citations

Yamashita, Masashi. (2025). Optical system, optical apparatus and method for manufacturing the optical system, and zoom optical system, optical apparatus and method for manufacturing the zoom optical system (U.S. Patent No. 12461350). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/12461350

Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile

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