Patent ID: 7762591
Filing Date: 2010-07-27
Classification: B42D

Abstract:
1. A security document having a first transparent region in which a first transparent optical element is arranged and a second region in which a second opaque optical element is arranged, which has a first optical effect, wherein the first region and the second region are arranged on a carrier of the security document in mutually spaced relationship in such a way that the first and second regions can be brought into overlap with each other, wherein the first optical element and the second optical element are of such a configuration and are so matched to each other that upon overlap of the second optical element with the first optical element at a first spacing between the first and the second optical element, a second optical effect is produced and upon overlap of the second optical element with the first optical element at a second spacing between the first and second optical elements, which is greater than the first spacing, a third optical effect which is different from the second optical effect is produced, wherein the second optical element has a microstructured moiré pattern with a moiré image concealed within the first optical effect, and the first optical element has an at least partially transparent layer in which there are superposed a moiré analyzer, which is matched to the microstructured moiré pattern, and a convex lens which is of a focal length which corresponds to the second spacing, said moiré image being revealed by the moiré analyzer in the second optical effect when the first and second optical elements are at the first spacing, and a magnification of the microstructuring of the moiré pattern being made visible by the convex lens in the third optical effect when the first and second optical elements are at the second spacing, said moiré image being no longer visible in the third optical effect, and wherein the first optical element is divided into a plurality of adjacent first and second regions, wherein the width and/or the length of the first and second regions is <200 μm, the first regions having structure forming the moiré analyzer and shaped in the second regions are structures forming the convex lens.