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Method of color correction in a color video display system

  • US 6,008,939 A
  • Filed: 02/01/1999
  • Issued: 12/28/1999
  • Est. Priority Date: 04/06/1998
  • Status: Expired due to Term
First Claim
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1. A method of color correction in a color video display viewing system, comprising:

  • collecting and collimating colored light from a substantial point source into a substantially collimated beam using a collimating lens;

    illuminating an image display surface with said substantially collimated beam;

    converging said collimated beam to form an intermediate image of said display surface at an intermediate image plane using an imaging element, wherein said converged beam passes through a plane of minimum convergence between said imaging element and said intermediate image plane and wherein an image of said substantial point source is formed at said plane of minimum convergence;

    forming a virtual image of said intermediate image plane using an eyepiece lens;

    wherein said collimating lens is color undercorrected and said imaging element is color overcorrected to offset said color undercorrected collimating lens, such that said image at said plane of minimum convergence is color corrected.

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