Patents by Inventor Gordon Henry Cook

Gordon Henry Cook 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).

  • Beam splitting prism assembly
    Patent number: 3932027
    Abstract: A four-element composite prism assembly for splitting an incident beam into three colour components, the first and second pairs of elements being separated by respective air gaps, and colour separation occurring at respective spectrally selective dichroic coatings between the second and third and the third and fourth prism elements respectively, the separated colour components being directed in different directions by total internal reflection at the air gaps. To achieve the optimum separation upper and lower limits are defined in the claims for the apex angles of the three prism elements.
    Type: Grant
    Filed: December 11, 1974
    Date of Patent: January 13, 1976
    Assignee: The Rank Organisation Limited
    Inventors: Gordon Henry Cook, John Anthony Fawcett