Patents by Inventor Kevin H. Yu

Kevin H. Yu 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).

  • Patent number: 5327266
    Abstract: A hologram exposure system for simultaneously exposing a plurality of holograms in a holographic recording layer, including first optical elements for providing a first reference beam and a first object beam that interfere in the holographic recording layer and are coherently matched relative to each other, and second optical elements for providing a second reference beam and a second object beam that interfere in the holographic recording layer and are coherently matched relative to each other but are coherently mismatched relative to the first reference and object beams, whereby the crosstalk holograms formed by interference of (1) the first reference beam with the second object beam, (2) the first object beam with the second reference beam, (3) the first object beam with the second object beam, and (4) the first reference beam with the second reference have reduced efficiencies.
    Type: Grant
    Filed: November 12, 1992
    Date of Patent: July 5, 1994
    Assignee: Hughes Aircraft Company
    Inventors: Jerry L. Mulder, Kevin H. Yu, John E. Wreede
  • Patent number: 5318816
    Abstract: A hologram decal including a hologram layer having first and second surfaces, a first polymer layer secured to the first hologram surface, a second polymer layer secured to the second hologram surface, a pressure sensitive adhesive layer disposed on the non-hologram side of one of the first and second polymer layers, and a release liner covering said pressure sensitive adhesive layer, and techniques for making the hologram decal.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: June 7, 1994
    Assignee: Hughes Aircraft Company
    Inventors: Khin S. Yin, John E. Wreede, Kevin H. Yu
  • Patent number: 4990415
    Abstract: A process for manufacturing a hologram on a stable substrate, such as flat glass, and for thereafter transferring that hologram to another substrate, including a curved surface. The process includes the use of an intermediate polyene-based urethane or epoxy acrylate adhesive layer, preferably comprised of Norland Optical Cement. An improved hologram is also disclosed having superior moisture barrier properties.
    Type: Grant
    Filed: August 1, 1988
    Date of Patent: February 5, 1991
    Assignee: Hughes Aircraft Company
    Inventor: Kevin H. Yu