| 摘要 |
So that a visually identifiable optical element, in particular a securi ty element for value-bearing documents, for example banknotes, credit cards, passes or cheque documents, or other articles to be safeguarded, comprising a carrier with a diffusely reflecting visible surface and a metallisation which is applied in a region-wise manner to the visible surface of the carrier and which has a surface that appears metallically shiny at a glancing angle is improved in such a way that an article provided with the element is even more effectively protected from forgery than is possible with known optical elements, it is proposed that the optical element is so designed that the visible surface of the carrier has two carrier regions with different levels of and in particular diffuse reflectivity for light, wherein a respective sub-region or a plurality of sub-regions of each of the two carrier regions is or are metallised, and that the reflectivity of the metallisation in viewing directions outside a glancing angle range is less than the reflectivity of the carrier region with the higher level of reflectivity or substantially corresponds to same and is greater than the reflectivity of the carrier region with the lower level of reflectivity or substantially corresponds to same. |
