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:
Jul. 28, 2015
Filed:
Dec. 12, 2012
Optical Logic Inc., Ina-shi, Nagano, JP;
Kantatsu Co., Ltd., Yaita-shi, Tochigi, JP;
Yoji Kubota, Ina, JP;
Kenichi Kubota, Ina, JP;
Hitoshi Hirano, Ina, JP;
Ichiro Kurihara, Yaita, JP;
Tomohiro Yonezawa, Yaita, JP;
OPTICAL LOGIC INC., Nagano, JP;
KANTATSU CO., LTD., Tochigi, JP;
Abstract
An imaging lens includes a first lens having positive refractive power; a second lens having negative refractive power; and a third lens having positive refractive power, arranged in this order from an object side to an image plane side. Further, the first lens is formed in a shape so that a curvature radius of a surface thereof on the object side is positive. The second lens is formed in a shape so that a curvature radius of a surface thereof on the object side is negative and a curvature radius of a surface thereof on the image plane side is positive. The third lens is formed in a shape so that a curvature radius of a surface thereof on the object side and a curvature radius of a surface thereof on the image plane side are both positive.