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. 03, 2016
Filed:
Jan. 29, 2014
Koito Manufacturing Co., Ltd., Minato-ku, Tokyo, JP;
KOITO MANUFACTURING CO., LTD., Tokyo, JP;
Abstract
A projection lens includes a rear face through which light emitted from a light source enters, and a front face from which the light is emitted in front of a vehicle in a predetermined light distribution pattern. The projection lens is configured such that, upon entering the projection lens, an incoming wavefront emitted from the light source is internally reflected by a first reflection region of the front face, a first intermediate wavefront generated by the internal reflection by the first reflection region is internally reflected by a second reflection region of the rear face, a second intermediate wavefront generated by the internal reflection by the second reflection region is refracted by a refraction region of the front face, and the refracted wavefront is emitted as an outgoing wavefront. The second reflection region is an optical surface determined based on the first intermediate wavefront and the second intermediate wavefront.