Patents by Inventor Raphael BRECHBÜHLER

Raphael BRECHBÜHLER has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Diffractive optical element
    Patent number: 12320996
    Abstract: A method of producing a diffractive optical element (1) comprises the steps of providing at least one substrate (3) having a surface (4) and generating a relief structure (2) in the surface (4) of the substrate (3) using a processing device (5). The relief structure (2) is generated such that a distance (D) between a surface (8) of the relief structure (2) and the surface (4) of the substrate (3) along the third direction (z) varies essentially continuously. A diffractive optical element (1) comprises a relief structure (2), wherein at least in a portion of the relief structure (2) a distance (D) between the surface (8) of the relief structure (2) and the surface (4) of the substrate (3) varies essentially continuously. A virtual image display device comprises at least a first and a second of such diffractive optical elements (1).
    Type: Grant
    Filed: July 7, 2020
    Date of Patent: June 3, 2025
    Assignees: ETH Zurich, Universiteit Utrecht Holding B.V.
    Inventors: David J. Norris, Nolan Lassaline, Raphael Brechbühler, Freddy Rabouw
  • DIFFRACTIVE OPTICAL ELEMENT
    Publication number: 20220260763
    Abstract: A method of producing a diffractive optical element (1) comprises the steps of providing at least one substrate (3) having a surface (4) and generating a relief structure (2) in the surface (4) of the substrate (3) using a processing device (5). The relief structure (2) is generated such that a distance (D) between a surface (8) of the relief structure (2) and the surface (4) of the substrate (3) along the third direction (z) varies essentially continuously. A diffractive optical element (1) comprises a relief structure (2), wherein at least in a portion of the relief structure (2) a distance (D) between the surface (8) of the relief structure (2) and the surface (4) of the substrate (3) varies essentially continuously. A virtual image display device comprises at least a first and a second of such diffractive optical elements (1).
    Type: Application
    Filed: July 7, 2020
    Publication date: August 18, 2022
    Applicants: ETH Zurich, Universiteit Utrecht Holding B.V.
    Inventors: David J. NORRIS, Nolan LASSALINE, Raphael BRECHBÜHLER, Freddy RABOUW