| 摘要 |
A security object has a substrate ( 1 ) carrying a first motif ( 6 ) and mutually aligned thereto a second motif ( 7 ). The first motif ( 6 ) is formed by a volume hologram ( 8 ) and visible under a given viewing condition only. The second motif ( 7 ) can e.g. be a dye, a surface hologram, a perforation or any other non-variable or optically variable device. The first and the second motif ( 6, 7 ) combine to form a third motif, e.g. a legible text. The combination of the first motif ( 6 ) formed by a volume hologram ( 8 ) with the second motif provides an increased level of security
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