Patents by Inventor Adrian Forrest Fray

Adrian Forrest Fray 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).

  • Liquid crystal light deflector
    Patent number: 4066334
    Abstract: An optical modulation device such as an electrical switchable prism, which may be used as a light deflector, or an electrically switchable lens, comprises a volume of liquid crystal material, means for applying electric or magnetic bias fields across the material and means for switching the bias fields to provide a controlled refractive index gradient in the liquid crystal material. The liquid crystal material may be contained between substrates having a set of four or eight electrodes (collectively) on their inner surfaces.
    Type: Grant
    Filed: January 5, 1976
    Date of Patent: January 3, 1978
    Assignee: National Research Development Corporation
    Inventors: Adrian Forrest Fray, David Jones