| 摘要 |
PURPOSE:To superpose individual reproduced image and to make reading of information impossible even if the whole face of a hologram is illuminated by reproduction light by recording plural different information to the specified parts of a hologram. CONSTITUTION:Holograms 10, 20, 30 are provided at the positions of arrangement according to the inherent information of a card recorded on a card substrate 1. Plural reproduced images are recorded in these holograms divided to different parts, and when each part is illuminated by reproduction light, individual reproduced images are formed. However, when the whole face of holograms are illuminated, plural reproduced images are formed, and recognition of individual reproduced image is impossible. Inherent information of the card is recorded in individual reproduced image as pattern information of combination of the shape, number and position of arrangement of images constituting the reproduced image. |
