| 摘要 |
<p>PURPOSE:To enable protection of the intrinsic or individual information of a card from becoming forged or altered by recording information using two different types of hologram such as white light regeneration-type hologram and laser beam regeneration-type hologram. CONSTITUTION:A hologram part contains a pattern which can be regenerated under a white light source as the first information and card forgery interpretation information which can be regenerated under laser beam source as the second information. If a regeneration light 11 originating from a white light source spot light 10 is emitted to the hologram part at a specified angle, a viewer 12 recognizes a regenerated image 13. In addition, if a laser beam 14 is prjected to the hologram part at a specified angle, the viewer 15 can recognize a regenerated image 16 as an imaginary image. If an image is regenerated using a conjugate light with a reference light during hologram recording, a real image can be regenerated. If it is designed so that a laser beam-regenerated image 16 can be formed at a position away from the hologram part, the laser beam-regenerated image 16 can hardly be recognized when the image is regenerated using a white color light, and only a white light-regenerated image 13 is recognized.</p> |
