Patent ID: 6836348
Filing Date: 2004-12-28
Classification: G02B,G03H

Abstract:
A holographic screen for projecting an image beam from an image projection device to display an image, wherein:the holographic screen is a plurality of laminated holograms; each hologram is produced by exposing a photosensitive material to an object beam serving as a diffused beam transmitted through or reflected from a light diffuser, and a reference beam which is not a diffused beam; and an angle of incidence, with respect to the normal to the holographic screen, of the reference beam on a center of the photosensitive material during exposure differs for each said hologram, wherein a projection angle &thgr;c, with respect to the normal to the holographic screen, of the image beam while using the holographic screen and an angle of incidence &thgr; of the reference beam on the photosensitive material during production of the holograms satisfy the following equation: &thgr;câˆ’10Â°&lE;&thgr;&lE;&thgr;c+10Â°.