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Lateral and longitudinal chromatic dispersion correction in display systems employing non-conformal reflection holograms

  • US 5,396,349 A
  • Filed: 07/23/1992
  • Issued: 03/07/1995
  • Est. Priority Date: 07/25/1991
  • Status: Expired due to Term
First Claim
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1. A display system comprising:

  • A) an illuminated image source providing non-monochromatic. light;

    B) a transparent non-conformal reflective holographic combiner element;

    C) means for directing light from said illuminated image source to form a virtual image of said illuminated light source, and to be reflected and affected at said holographic combiner element such that said image has both lateral and longitudinal chromatic dispersion; and

    D) holographic means between said image source and said combiner element for correcting both said lateral and longitudinal chromatic dispersions wherein said holographic means takes the form of both linear and circular gratings.

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