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:
Jun. 03, 2025
Filed:
Jul. 07, 2020
Eth Zurich, Zurich, CH;
Universiteit Utrecht Holding B.v., Utrecht, NL;
David J. Norris, Zürich, CH;
Nolan Lassaline, Zürich, CH;
Raphael Brechbühler, Aarau, CH;
Freddy Rabouw, Utrecht, NL;
ETH Zurich, Zurich, CH;
Universiteit Utrecht Holding B.V., Utrecht, NL;
Abstract
A method of producing a diffractive optical element () comprises the steps of providing at least one substrate () having a surface () and generating a relief structure () in the surface () of the substrate () using a processing device (). The relief structure () is generated such that a distance (D) between a surface () of the relief structure () and the surface () of the substrate () along the third direction (z) varies essentially continuously. A diffractive optical element () comprises a relief structure (), wherein at least in a portion of the relief structure () a distance (D) between the surface () of the relief structure () and the surface () of the substrate () varies essentially continuously. A virtual image display device comprises at least a first and a second of such diffractive optical elements ().