| 摘要 |
A security device, which is suitable in particular for improving the anti-forgery security of payment means, wherein the security device comprises a flat light reflection element. Several three-dimensional diffractive surface elements are arranged on a surface of the light reflection element. The surface elements comprise a diffraction grating on a light outlet surface. The diffraction gratings of a group of light surface elements are designed and/or arranged in such a way that an asterism is produced for an observer and/or an examination device. |
