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Hologram screen and a method of producing the same

  • US 20020154348A1
  • Filed: 03/26/2002
  • Published: 10/24/2002
  • Est. Priority Date: 07/07/1998
  • Status: Active Grant
First Claim
Patent Images

1. A hologram screen for reproducing an image based on an output light obtained by scattering and diffusing an image light from an image projector, characterized in that;

  • when a white light is used as the image light and projected on the hologram screen; and

    when a distance between two points at optional two points A and B on a surface of the hologram screen is given by 20 cm or less, and a value of the CIE 1976 chromaticity coordinate (u′

    , v′

    ) at the point A is given by (u′

    A, v′

    A) and the value of the CIE 1976 chromaticity coordinate (u′

    , v′

    ) at the point B is given by (u′

    B, v′

    B);

    the output light, which is output perpendicularly from the surface of the hologram screen, has a color distribution in which a color difference Δ

    u′

    v ′

    between two points A and B is derived from the following formula (1) and given by 0.06 or less, where, the formula (1) is expressed by, Δ

    u′

    v′

    =[(u′

    A-u′

    B)2+(v′

    A-v′

    B)2]½





    (1)

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