| 摘要 |
Described is a security document with a transparent security element ( 12 ) which is arranged in a window or in a transparent region of the security document and has a structure layer, in which a first region ( 12 f) of the structure layer has an asymmetrical diffractive relief structure, wherein the first region ( 12 f) has an optical effect which is unexpectedly different in a front view and in a rear view of the security document.
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