| 摘要 |
A security document having a first side (11) and a second side (12), the security document comprising a first pattern (31) and a second pattern (32) located closer to the second side (12) than the first pattern (31), the first pattern (31) and the second pattern (32) overlapping such that the overlapping area defines a shape of a security pattern (40). The first pattern (31) comprises first single fluorescent substance adapted to emit first visible light (61), and the second pattern (32) comprises second single fluorescent substance adapted to emit second visible light (62). When the security pattern (40) is irradiated from the direction of the first side (11) the first visible light (61) dominates the second visible light (62) at the first excitation radiation (51) and the second visible light (62) dominates the first visible light (61) at the second excitation radiation (52). |
