Patent ID: 8564866

Claim:
A computer-generated hologram, which has a complex amplitude of object light recorded therein, and is capable of selectively reconstructing a plurality of images depending on a viewing direction, characterized in that a virtual collective point group is spatially provided on a side of the hologram facing a viewing side of the hologram and a multiplicity of parallel slice planes traversing a plane of the virtual collective point group and a plane of the hologram are provided; light having a plurality of different wavelengths varying periodically in a direction orthogonal to the slice planes is assigned to the slice planes; in each slice plane, light collecting on virtual collective points is allowed to have the assigned wavelengths; an angle profile of luminance of convergent light that is incident on the respective virtual collective points in the virtual collective point group in the slice planes from a side of the hologram facing away from the viewing side of the hologram in the slice planes is divided into angles; in each angle, there is convergent light that converges in the slice plane on a point having a density of a wavelength corresponding to pixels of separate images positioned at the plane of the virtual collective point group at a virtual collective point position or an amplitude equal to a value having a constant relation to said density, so that convergent light set equal to said convergent light is recorded as object light at any position of a side of the virtual collective point group on which the convergent light is incident.