| 摘要 |
The invention relates to an optically variable element which comprises, at least in partial areas and embedded between two layers (1, 2), a boundary surface (3) which is optically active, said boundary surface (3) having a preshaped area that appears three-dimensional to the viewer's eye. In order to emphasize this preshaped area, the preshaped area is formed by a lens-shaped partial area of the boundary surface (3) and generates a magnifying, reducing or distorting effect. The application further relates to the use of such optically variable elements as forgery-proof security elements of valuable documents or for objects to be protected, especially as a part of the decorative layer arrangement of a transfer film or laminated film. |
