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Astigmatic correction in LCoS video projection color management architectures using shared plate beam splitters

  • US 20040263991A1
  • Filed: 05/12/2004
  • Published: 12/30/2004
  • Est. Priority Date: 05/13/2003
  • Status: Abandoned Application
First Claim
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1. A system for projecting an optical image, the system comprising:

  • a lens configured to receive and focus light rays to project the image;

    a first beam splitting/combining plate that refracts light rays passing through it, the refracting creating pluralities of light rays having corresponding optical paths causing each of the pluralities to be focused on corresponding focal planes by the lens; and

    a second beam splitting/combining plate configured to receive the pluralities of rays from the first beam splitting/combining plate, the second beam splitting/combining plate oriented with respect to the first beam splitting/combining plate so as to compensate the corresponding optical paths of the pluralities of rays such that each of the pluralities are focused on substantially the same focal plane by the lens.

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