Patents by Inventor Roger Bowman

Roger Bowman 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).

  • Acousto-optic transducer
    Patent number: 4527866
    Abstract: A spectrum analyzer incorporates a 36.degree. Y cut lithium niobate Bragg cell provided on one face with an interdigital transducer. The 36.degree. Y cut maximizes the ratio of quasi-longitudinal to quasi-shear wave piezoelectric coupling with the interdigital transducer and thereby minimizes the output of spurious signals from the analyzer. In a preferred embodiment the Bragg cell comprises two lithium niobate crystals bonded by a metal (preferably gold) film, the crystal attached to the transducer being 36.degree. Y cut and the other crystal being cut so as to maximize acousto-optic coupling.
    Type: Grant
    Filed: March 30, 1983
    Date of Patent: July 9, 1985
    Assignee: The Marconi Company, Limited
    Inventors: Roger Bowman, Robert C. Peach, David R. J. Milverton