| 摘要 |
A secured document contains at least two sets of information on an information layer, the sets of information providing different informational contents when the data carrier is viewed from different angles. The document contains an optically active microstructure having at least two different regions which are transparent, wherein one region has a diffraction structure and the other region is free of diffraction structures. The sets of information which are to be read are disposed in regions beneath the microstructure. The microstructure may comprise a hologram-like sheet in which a grid-like diffraction structure is embossed by means of an embossing punch. |
