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:
Oct. 12, 2021
Filed:
Jul. 27, 2017
Applicant:
Nikon Corporation, Tokyo, JP;
Inventors:
Satoshi Miwa, Yokohama, JP;
Hiroshi Yabumoto, Yokohama, JP;
Assignee:
NIKON CORPORATION, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 15/14 (2006.01); G02B 27/42 (2006.01);
U.S. Cl.
CPC ...
G02B 15/143101 (2019.08); G02B 27/4205 (2013.01);
Abstract
An optical system (OL) used for an optical apparatus such as a camera () includes a focusing group (Gf) that moves upon focusing, a diffractive optical element (GD) disposed on an object side of the focusing group (Gf) and a negative lens element (L1) disposed on the object side of the diffractive optical element (GD). The optical system (OL) satisfies the following expressions0.030<<0.0501+0.006×ν1<1.91035<ν1where,