Patents Represented by Attorney, Agent or Law Firm Iain A. McIntyre
  • Projection system having low astigmatism
    Patent number: 6786604
    Abstract: LCD projection systems that use reflective LCD imager units commonly use one or more polarization beamsplitters to separate the light incident on the imager from the light reflected by one or more respective imagers. The polarizing beamsplitters introduce astigmatism to the image light from the imagers. According to the present invention, the polarization beamsplitters are adapted to reduce the astigmatism.
    Type: Grant
    Filed: May 29, 2002
    Date of Patent: September 7, 2004
    Assignee: 3M Innovative Properties Company
    Inventors: David J. W. Aastuen, Charles L. Bruzzone, Jiaying Ma