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:
Jul. 07, 2020
Filed:
Dec. 28, 2016
Applicant:
Dai Nippon Printing Co., Ltd., Tokyo-to, JP;
Inventors:
Assignee:
DAI NIPPON PRINTING CO., LTD., Tokyo, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F21V 5/02 (2006.01); G02B 27/42 (2006.01); G02B 5/18 (2006.01); F21Y 115/10 (2016.01);
U.S. Cl.
CPC ...
F21V 5/02 (2013.01); G02B 5/18 (2013.01); G02B 27/4222 (2013.01); F21Y 2115/10 (2016.08);
Abstract
A diffractive optical element is configured to provide desired diffracted light and is excellent in durability. The diffractive optical element shapes light from a light source, wherein the diffractive optical element is provided with a diffractive layer having a periodic structure having low refractive index portions and high refractive index portions, and the high refractive index portions of the periodic structure include one having an aspect ratio of 2 or more.