Patent ID: 7333252

Claim:
A method of writing a composite 1-step hologram, comprising: generating a laser beam; acquiring digital data from an object, said digital data being described by a luminous intensity tensor kg I ij wherein i and j are the horizontal and vertical pixel coordinates of a given perspective view that is generated by a real or virtual camera whose location is described by k in the horizontal dimension and g in the vertical dimension; performing a single mathematical transformation to convert said luminous intensity tensor kg I ij into a tensor μν T αβ wherein α and β are the horizontal and vertical coordinates of a holographic pixel on the composite hologram and μ and ν are the horizontal and vertical coordinates of a given pixel on a spatial light modulator on to which the data for each holographic pixel is written, wherein said single mathematical transformation transforms said digital data whilst integrally correcting said digital data for a finite distortion of an optical objective; writing corrected data to a spatial light modulator, wherein said corrected data is described by said tensor μν T αβ ; directing said laser beam on to said spatial light modulator so that at least a portion of said laser beam is spatially modulated by said spatial light modulator to form a spatially modulated laser beam; passing said spatially modulated laser beam through an optical objective having a finite distortion, said optical objective focusing said spatially modulated laser beam on to a photosensitive substrate; directing a reference recording beam on to said photosensitive substrate; and forming a double-parallax composite hologram on said photosensitive substrate.