| 摘要 |
PURPOSE:To provide a monochromatic light regenerative hologram capable of preventing easy forgery with a dead copy, together with a regenerative method and device therefor. CONSTITUTION:This monochromatic light regenerative hologram 100 is to regenerate a hologram image by radiating monochromatic light at a specific angle to a hologram recording zone 101 where an interference fringe for forming a hologram image is provided. A plurality of hologram image groups different from each other in the directivity of the interference fringe are multi-recorded in the zone 101 and at the same time, each type of monochromatic light is concurrently radiated at angles corresponding to respective fringes. As a result, each hologram image group is concurrently regenerated, thereby providing the feature of the constitution of a single information pattern consisting of a character 'OK'. Also, even when a laser beam is radiated to the zone 101 unidirectionally, only a part of the hologram image groups can be dead copied and, therefore, the forgery thereof can be prevented. |
