Patent ID: 7215451
Filing Date: 2007-05-08
Classification: G02B,G02F,G03H

Abstract:
1. A method of fabricating a hologram-recorded medium from a photopolymer capable of recording a volume hologram, the method comprising: stacking the photopolymer material on a dichroic filter comprising a multilayer interference film, said dichroic filter being stacked on a first reflection type relief hologram, and striking reconstructing illumination light of given wavelength on said first reflection type relief hologram through said photopolymer and said dichroic filter, so that first interference fringes produced by interference of light diffracted from said first reflection type relief hologram and the incident light are recorded in said photopolymer, replacing said first reflection type relief hologram with a second reflection type relief hologram and striking reconstructing illumination light of the given wavelength on said second reflection type relief hologram through said photopolymer and said dichroic filter, so that second interference fringes produced by interference of light diffracted from said second reflection type relief hologram and the incident light are recorded in said photopolymer, wherein each of said first and second reflection type relief holograms comprises a computer generated hologram (CGH); the resulting hologram comprises a set of pixels and interference gratings differing in grating surface spacing and inclination for each pixel which are recorded therein; and the first reflection type relief hologram differs from the second reflection type relief hologram.