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:
Aug. 13, 2024
Filed:
Jan. 21, 2019
Dexerials Corporation, Tokyo, JP;
Kazuyuki Shibuya, Tokyo, JP;
Katsuhiro Shindo, Tokyo, JP;
Naoki Hanashima, Tokyo, JP;
Yusuke Matsuno, Tokyo, JP;
Dexerials Corporation, Tokyo, JP;
Abstract
In order to provide an optical device and a diffusion plate which has high transmittance and is capable of reducing speckle noise, the present it is a diffusion platein which a plurality of microlens cellsare arranged on both surfaces of a transparent substrate, the diffusion platehaving a first microlens arrayA which is formed on one surface of the transparent substrateand comprises a plurality of concave or convex microlens cells, and a second microlens arrayB which is formed on the other surface on the reverse side from the one surface and comprises a plurality of concave or convex microlens cells, and the diffusion platebeing configured so that light emitted from the microlens cellsconstituting the first microlens array 12A is incident on the microlens cells 11 constituting the second microlens array 12B.