| 摘要 |
The invention relates to a security element (10) for producing documents of value, such as bank notes, checks, or similar, which has an upper side that provides a plurality of micro-images (9), in particular for a lens magnification assembly, wherein each micro-image (9) is formed by a microcavity structure (1) which comprises a plurality of microcavities (3) arranged side-by-side, each microcavity (3) having a dimension of 0.5 to 3 mum in a spatial direction that is parallel to the upper side, and the surface of the microcavity structure (1) is optically reflective or highly refractive so that reflection occurs on at least part of the surface. Each micro-image (9) includes microcavities (3) of at least a first and a second type, said types differing in terms of the aspect ratio of the microcavities (3), and therefore, each micro-image (9) is structured by the at least two different types of microcavities (3). |
