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:
May. 25, 2021
Filed:
Feb. 18, 2019
Nidec Sankyo Corporation, Nagano, JP;
Yosuke Kanzaki, Nagano, JP;
NIDEC SANKYO CORPORATION, Nagano, JP;
Abstract
A wide-angle lensincludes a first lens, a second lens, a third lens, a diaphragm, a fourth lens, and a fifth lens. The first lensis a negative meniscus lens whose lens surface on an image side Lb is a concave curved surface. The second lensis a negative lens whose lens surface on the image side Lb is a concave curved surface and whose lens surface on the object side La is convex curved surface. The third lensis a positive lens whose lens surface on the image side Lb is a convex curved surface. The fourth lensis a negative lens whose lens surface on the image side Lb is a concave curved surface. The fifth lensis a biconvex lens. A refractive index n1 of the first lenssatisfies a conditional expression.