Patents Represented by Attorney Booker T. Hogan

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  • Bleached holographic material and process for the fabrication thereof using halogens
    Patent number: 3967963
    Abstract: Silver halide holographic materials have been fabricated by a bleach process which yields substantially improved printout stability while retaining high diffraction efficiencies. Halogen vapors, liquids and nonaqueous solutions are employed to transform amplitude holograms into thick phase holograms in processes that are relatively inexpensive and simple to complete. Recorded patterns produced by these processes may be used for diffraction gratings, Fresnel zone plates, optical elements and the production of special waveforms.
    Type: Grant
    Filed: September 2, 1975
    Date of Patent: July 6, 1976
    Assignee: Hughes Aircraft Company
    Inventor: Andrejs Graube