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. 13, 2024
Filed:
Aug. 26, 2020
Nikon Corporation, Tokyo, JP;
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;
Nikon Corporation, Tokyo, JP;
Abstract
An optical system (LS) has an aperture stop (S), and a negative lens (L) disposed closer to the image side than the aperture stop (S) and satisfying the following conditional expressions.−0.010<2−(2.015−0.0068×ν2),50.00<ν2<65.00,0.545<θ2,−0.010<θ2−(0.6418−0.00168×ν2)where ndN2 is the refractive index to the d line of the negative lens, νdN2 is the Abbe number with respect to the d line of the negative lens, and θgFN2 is the partial dispersion ratio of the negative lens.