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:
Feb. 26, 2019
Filed:
Dec. 30, 2015
Nalux Co., Ltd., Osaka-shi, Osaka, JP;
Katsumoto Ikeda, Osaka, JP;
NALUX CO., LTD., Osaka-Shi, Osaka, JP;
Abstract
An optical element includes a light receiving surfacecovering a light source on a plane and an exit surface. When the central axis is AX, the intersection of AX with the plane is P, and in a cross section containing AX, an angle between a line connecting Pand P onand AX is θr, an angle between a normal toat Q and AX is ϕ, a distance from AX to Q is r, the maximum value of r onis r, and θr and ϕ are positive when measured clockwise with respect to AX, ϕ has plural positive local maximum and minimum values as a function of r in0.5in an area ofthrough which a ray travelling from Pat a positive angle θr passes, and the shape ofis symmetric with respect to AX.