Patents by Inventor George Rakuljic

George Rakuljic 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).

  • Fixing method for narrow bandwidth volume holograms in photorefractive materials
    Patent number: 5335098
    Abstract: An improved method for storing permanent holographic gratings in photorefractive materials for use in narrow band filters such as the H.sub.60 filter, as well as the filters themselves. The invention also provides an improved method of controlling the electric field and the nature of the photorefraction to minimize wavelength shifts and band broadening at a minimal reduction of diffraction efficiency.
    Type: Grant
    Filed: October 23, 1992
    Date of Patent: August 2, 1994
    Assignee: Accuwave Corporation
    Inventors: Victor Leyva, George A. Rakuljic
  • Real time optical computing and image processing using self-pumped conjugate mirror
    Patent number: 4762394
    Abstract: Real time "exclusive or" operation, image subtraction, intensity inversion, and first- and second-order differentiation is achieved by an interferometer with a phase conjugate mirror for retroreflection of two or more beams derived from a single beam by a beam splitter and recombined interferometrically by the beam splitter.
    Type: Grant
    Filed: June 16, 1986
    Date of Patent: August 9, 1988
    Assignee: California Institute of Technology
    Inventors: Sze-Keung Kwong, George A. Rakuljic, Victor Leyva, Amnon Yariv