| 摘要 |
FIELD: security facilities. ^ SUBSTANCE: invention relates to protection component, provided for protection against falsification of important documents, to method of its manufacturing, and also to protection system and to important document. Protection element contains the first light-polarising layer, which is at least at some sections and contains cholesteric liquid-crystalline material, which selectively reflects light with predefined circular polarisation and which is selectively reflects light of the first wave range in the first direction of reflection and light of the second wave range, in the second, different from the first direction of reflection. Protection element contains the second light-polarising layer, which is at least on several sections and selectively reflects light with circular polarisation, opposite to predefined circular polarisation, and selectively reflects light of the first and the second wave range, correspondingly, in the first and the second direction of reflection. Protection element also contains semitransparent filtering layer on which one above the other are the first and the second light-polarising layers. Percolation bed at least partially absorbed light of visible spectrum range and admit light of the first and/or the second wave range. ^ EFFECT: proposed protection element allows high degree of protection against falsification. ^ 42 cl, 17 dwg |
