Patent ID: 6813048
Filing Date: 2004-11-02
Classification: G03H

Abstract:
A process of fabricating a computer-generated hologram with interference fringes recorded on a given recording surface by computer-aided computations, which comprises steps of:defining 2 to K original images, a recording surface for recording the original images and reference light with which the recording surface is irradiated and which corresponds to the 2 to K original images, defining a multiplicity of sample light sources on each original image, defining a given angle of spreading for object light emitted from individual sample light sources, determining an area on the recording surface, at which object light emitted from all sample light sources defined on one original image arrive with a limited angle of spreading, as a recording area corresponding to said one original image, thereby defining recording areas corresponding to each of the K original images, assigning priorities to a plurality of recording areas when the plurality of recording areas overlap one another on the recording surface, so that a recording area having higher priority is preceded over the rest with respect to an overlapping portion, thereby eliminating the overlapping portion, defining a multiplicity of computation points on the recording surface so that on each computation point, the intensity of interference fringes formed by reference light and object light emitted from sample light sources on the original image corresponding to the recording area to which said computation point is allocated and from which the overlapping has been eliminated is found by computation, and forming interference fringes comprising a distribution of intensities of interference fringes found on each computation point as a hologram on the recording surface.