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. 24, 2017
Filed:
Apr. 15, 2015
Kantatsu Co., Ltd., Yaita-shi, Tochigi, JP;
Masaya Hashimoto, Sukagawa, JP;
KANTATSU., LTD., Yaita, JP;
Abstract
A compact low-profile low-cost imaging lens with an F-value of 2.4 or less which offers a wide field of view and corrects aberrations properly. It includes elements arranged from an object side: a first positive lens having a convex surface on the object side as a first optical element; a second negative lens having a concave surface on an image side as a second optical element; a third positive lens as a third optical element; a fourth negative lens as a double-sided aspheric lens having a convex surface on the image side as a fourth optical element; and a fifth lens as a double-sided aspheric lens having a concave surface on the image side as a fifth optical element. As a sixth optical element, one aberration correction optical element as a double-sided aspheric element with virtually no refractive power is located between the first lens and the image plane.