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. 20, 2018
Filed:
Mar. 01, 2016
Asahi Glass Company, Limited, Chiyoda-ku, JP;
Koji Miyasaka, Tokyo, JP;
ASAHI GLASS COMPANY, LIMITED, Chiyoda-ku, JP;
Abstract
To make it possible to emit a light pattern with a uniform light quantity within a detection surface in spite of 0th-order diffracted light included therein or to emit a light pattern for overall irradiation with a uniform light quantity distribution, without limiting a degree of freedom for design of the emitted light pattern. In a diffraction optical element according to the invention, a divergence angle converting function that is a function of converting the divergence angle of incident light due to diffraction effect and a light beam splitting function that is a function of splitting an incident light beam into a plurality of light beams due to diffraction effect are combined so that incident light as divergent light is split into a plurality of diffracted lights with different divergence angles from the divergence angle of the incident light and the diffracted lights is emitted.