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. 19, 2019
Filed:
Feb. 13, 2014
Applicant:
Nikon Corporation, Tokyo, JP;
Inventors:
Keigo Koida, Kawasaki, JP;
Atsushi Suzuki, Tokyo, JP;
Assignee:
Nikon Corporation, Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G02B 9/62 (2006.01); G02B 13/04 (2006.01); G02B 13/18 (2006.01); G02B 7/02 (2006.01);
U.S. Cl.
CPC ...
G02B 13/04 (2013.01); G02B 7/021 (2013.01); G02B 13/18 (2013.01); Y10T 29/49826 (2015.01);
Abstract
An optical system has, in order from an object: a first lens having negative refractive power; a second lens having positive refractive power; a third lens having positive refractive power; a fourth lens having negative refractive power; a fifth lens having negative refractive power; and a sixth lens having positive refractive power, wherein the following conditional expression (1) is satisfied: 1.52<LR/f3 - - - (1), where LRdenotes a radius of curvature of an object side lens surface of the third lens L, and f3 denotes a focal length of the third lens L