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. 29, 2013
Filed:
Mar. 01, 2012
Yoji Kubota, Nagano, JP;
Kenichi Kubota, Nagano, JP;
Hitoshi Hirano, Nagano, JP;
Ichiro Kurihara, Tochigi, JP;
Yoshio Ise, Tochigi, JP;
Sumio Fukuda, Tochigi, JP;
Yoji Kubota, Nagano, JP;
Kenichi Kubota, Nagano, JP;
Hitoshi Hirano, Nagano, JP;
Ichiro Kurihara, Tochigi, JP;
Yoshio Ise, Tochigi, JP;
Sumio Fukuda, Tochigi, JP;
Optical Logic Inc., Nagano, JP;
Kantatsu Co., Ltd., Tochigi, JP;
Abstract
An imaging lens includes a first lens having negative refractive power; a second lens having negative refractive power; a third lens; a fourth lens; and a fifth lens. The first lens has a positive curvature radius on an image plane side. The second lens has a sharp convex surface, and a positive curvature radius on the image plane side. The third lens has a positive curvature radius on the object side and a negative curvature radius on the image plane side. The fourth lens has a negative curvature radius on the object side and a positive curvature radius on the image plane side. The fifth lens has a positive curvature radius on the object side and a negative curvature radius on the image plane side, and an aspheric surface.