Patents by Inventor Christophe Robillard

Christophe Robillard 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).

  • Illumination device having beam splitting polarization means
    Patent number: 5382790
    Abstract: A device for illuminating an area includes a circular reflector for focussing a light ray from a light source into a beam. A polarizer splits the beam into an effective beam having a first polarization direction and a complimentary beam having a second polarization direction. The polarizer reflects the effective radiation toward the area to be illuminated and transmits the complementary radiation to a rough surface having a roughness at least an order of magnitude greater than the wavelength of the light to diffuse the light and reflect at least a portion of the complementary beam back to the reflector and another portion to the area to be illuminated.
    Type: Grant
    Filed: March 23, 1993
    Date of Patent: January 17, 1995
    Assignee: Deutsche Thomson-Brandt GmbH
    Inventors: Christophe Robillard, Susan Ayari, Eric Marcellin-Dibon