| 摘要 |
A security element for authenticating a substrate (1) has a pattern consisting of optical diffraction elements (4) embossed in a support material of plastic and of unembossed neutral areas (5). On the embossing side of the support material, a reflecting layer covers only areas with relief structures of the diffraction elements (4), whereas the neutral areas (5) lying between them are free of the reflecting layer and hence are non-reflecting. If the security element is bonded to the substrate (1) as a stamp (3) and if the support material is transparent, partial images (6) of a feature (2) on the substrate (1), masked by the stamp (3), are identifiable through the neutral areas (5). <IMAGE> |
