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. 24, 2022
Filed:
Mar. 20, 2018
Dai Nippon Printing Co., Ltd., Tokyo, JP;
Nobuhito Toyama, Tokyo, JP;
DAI NIPPON PRINTING CO., LTD., Tokyo, JP;
Abstract
A diffractive optical element, in which a diffraction grating having a large pitch and a multitude of diffraction gratings can be arranged, includes a plurality of cells arranged side by side, wherein, for each cell, the pitch at which projections are lined up and/or the orientation of an in-plane rotation direction are/is different, and, within a single cell, the projections' pitch and the in-plane rotation direction orientation are the same, the diffractive optical element shaping light by this configuration which is an assembly of these cells. The plurality of cells include: a plurality of basic cells having the same outer shape; and a composite cell having a different outer shape from the basic cells, formed such that the length thereof in a specific direction is longer than the length of the basic cell, the composite cell having a diffraction grating including at least a single pitch's worth of the projection(s).
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile