Patent ID: 6885483

Claim:
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 Δu′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 ] 1/2 (1).