Patent ID: 7229720

Claim:
A method for producing on a hologram recording tape a plurality of volume-type main-holograms, each of the plurality of main-holograms being substantially the same, and a plurality of volume-type sub-holograms formed in the hologram recording tape, each one of the plurality of volume-type sub-holograms being disposed adjacent a respective one of the plurality of volume-type main-holograms, each one of the plurality of volume-type sub-holograms being different from all others of the plurality of volume-type sub-holograms, comprising the steps of: coupling the hologram recording tape with a master hologram plate comprising a reflective area adjacent to the main-hologram to be duplicated; and irradiating the master hologram plate with a laser beam to form multiple duplicates of the master hologram in the hologram recording tape; wherein each of the volume-type sub-holograms being formed in the hologram recording tape by a laser beam at the same time or sequentially and in a different area than the respective one of the main-holograms and each of the plurality of sub-holograms indicating information substantially specific to each of the plurality of volume-type main-holograms corresponding to an image in the reflective element.