Computer-generated hologram fabrication process, and hologram-recorded medium

A process of fabricating a computer-generated hologram having an optical pattern formed on a given recording surface by computer-aided computation, which comprises steps of:

• defining 2 to K original images, and a recording surface for recording the original images, and
• defining a multiplicity of sample light sources on each original image and defining a multiplicity of computation points on the recording surface, so that for each computation point, the complex amplitude at a position of said computation point of object light coming from all or some of the sample light sources is computed thereby defining a specific amplitude and a specific phase at each computation point, and locating a physical cell having optical properties consistent with said specific amplitude and said phase in the vicinity of each computation point, so that a hologram recording surface is formed by a set of physical cells, wherein:
• process settings are such that the spatial densities of sample light sources defined on at least two different original images differ from each other.

The hologram-recorded medium having a plurality of original images recorded thereon, wherein:

• for each original image, information is recorded in separately different recording areas, information carried by object light emitted from a multiplicity of sample light sources defined on the original images to be recorded is recorded in each recording area, and spatial densities of sample light sources on at least two different original images differ from each other.

A hologram-recorded medium having a plurality of original images recorded therein, wherein:

• a multiplicity of strip areas of identical rectangular shape are arranged to construct a recording surface,
• a given optical pattern is recorded within each strip area, and strip areas having the same optical pattern recorded therein are continuously and repetitively located by a given number, and
• for each original image, information is recorded in separately different recording areas, and the number of continuously located strip areas having an identical optical pattern recorded therein differs with respect to at least two recording areas.