Patents by Inventor Andrei Putilin

Andrei Putilin 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).

  • Waveguide hologram illuminators
    Patent number: 5854697
    Abstract: A waveguide hologram illumination system is based on thin substrate waveguides bearing a hologram on the surface through which light is diffracted out. A light source is optically coupled to the waveguide such that light emitted from the source is caused to propagate along the waveguide, being diffracted out at intersections with the surface of the waveguide on which the hologram is formed. The selective emission through the hologram can be advantageously used to illuminate display holograms or spatial light modulators. Provisions are made for rendering the amount of light emitted through the hologram uniform along the length of the hologram.
    Type: Grant
    Filed: June 7, 1995
    Date of Patent: December 29, 1998
    Assignee: The University of Alabama in Huntsville
    Inventors: H. John Caulfield, Qiang Huang, Andrei Putilin, Valentin Morozov, Joseph Shamir
  • Waveguide hologram illuminators
    Patent number: 5515184
    Abstract: A waveguide hologram illumination system is based on thin substrate waveguides bearing a hologram on the surface through which light is diffracted out. A light source is optically coupled to the waveguide such that light emitted from the source is caused to propagate along the waveguide, being diffracted out at intersections with the surface of the waveguide on which the hologram is formed. The selective emission through the hologram can be advantageously used to illuminate display holograms or spatial light modulators. Provisions are made for rendering the amount of light emitted through the hologram uniform along the length of the hologram.
    Type: Grant
    Filed: June 23, 1992
    Date of Patent: May 7, 1996
    Assignee: The University of Alabama in Huntsville
    Inventors: H. John Caulfield, Qiang Huang, Andrei Putilin, Valentin Morozov, Joseph Shamir
  • Side illuminated multimode waveguide
    Patent number: 5465311
    Abstract: A multimode waveguide having a small thickness has light coupled to the side of the waveguide in order to provide a multimode operation of the waveguide for providing a continuous pattern of totally internally reflected light which is utilized to reconstruct holographic images from a holographic emulsion placed on a surface of the waveguide. This waveguide structure for reconstructuring a hologram has the capability of providing highly efficient hologram reconstruction while using ordinary light sources and is able to use beam diameters greater than the thickness of the waveguide.
    Type: Grant
    Filed: January 10, 1994
    Date of Patent: November 7, 1995
    Assignee: The University of Alabama in Huntsville
    Inventors: H. John Caulfield, Qiang Huang, Andrei Putilin, Valentin Morozov
  • Multimode waveguide holograms capable of using non-coherent light
    Patent number: 5295208
    Abstract: A multimode waveguide having a small thickness has light coupled to the side of the waveguide in order to provide a multimode operation of the waveguide for providing a continuous pattern of totally internally reflected light which is utilized to reconstruct holographic images from a holographic emulsion placed on a surface of the waveguide. This waveguide structure for reconstructuring a hologram has the capability of providing highly efficient hologram reconstruction while using ordinary light sources and is able to use beam diameters greater than the thickness of the waveguide.
    Type: Grant
    Filed: February 26, 1992
    Date of Patent: March 15, 1994
    Assignee: The University of Alabama in Huntsville
    Inventors: H. John Caulfield, Qiang Huang, Andrei Putilin, Valentin Morozov