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:
Jan. 02, 2018
Filed:
Jun. 09, 2014
Nalux Co., Ltd., Osaka-shi, Osaka, JP;
Katsumoto Ikeda, Osaka, JP;
Daisuke Seki, Osaka, JP;
NALUX CO., LTD., Osaka-Shi, Osaka, JP;
Abstract
An optical element is provided. When in a xz cross section, an angle which a ray travelling from the origin at θr forms with the normal to the light receiving surface is designated as φx, an angle which a ray travelling from b in the z axis direction forms, after the surface, with the z axis direction is designated as θib, in a yz cross section, an angle which a ray travelling from the origin at θr forms with the normal to the light receiving surface is designated as φy, angles which a ray travelling from a in the z axis direction forms, after the light receiving and exiting surfaces, with the z axis direction are designated as θia and θea, and an angle which a ray travelling from the origin at arctan(a/ha) forms, after the light exiting surface, with the z axis direction is designated as θ,φ>φ(0<θ<60°)θ>45°θ>45°θ>θare satisfied.