Patents by Inventor Steven James Chapman

Steven James Chapman 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 system
    Patent number: 6341876
    Abstract: An illumination system for illuminating a spatial light modulator. An integrator rod is positioned in the light path between an arc lamp and the spatial light modulator. At the input surface of the integrated rod, there is positioned a field lens for defocusing areas of turbulence within the arc lamp. In the output surface of the integrated rod there is positioned a plate effective to prevent dust from being attracted to the output surface of the integrator rod. The integrator rod is effective to combine light from two separate light sources.
    Type: Grant
    Filed: October 21, 1999
    Date of Patent: January 29, 2002
    Assignee: Digital Projection Limited
    Inventors: Graham Harry Moss, Steven James Chapman