| abstract |
A security element including a plurality of focusing elements, a plurality of image regions where each image region is associated with a focusing element, each image region is printed with at least two layers, the first layer is offset by a first 5 predetermined amount from a reference axis in the image region, the second layer is offset by a second predetermined amount from a reference axis in the image region, each layer being in different colours, and each image region includes at least a first and second sub-region, wherein a first image is formed in a first range of viewing angles from the first sub-region and a second image is 10 formed in a second range of viewing angles from the second sub-region. Viewing Viewing angle B angle A b +delta b g + delta g r +-delta r I-fr+deltar] . 1-[g+deltu g) 1__1-fb+delta b) Figure 7 |