Optically variable security element

Abstract

The invention relates to an optically variable security element (12) for the protection of valuable items, which, depending on the viewing angle, shows a motif having at least one curve representation(14A, 14B), which from a first viewing direction is visible as output curve having two or more contiguous, non-collinear segments (18), and which, upon tilting the security element (12), breaks up about a pre-defined axis into the individual segments (18) in that the segments (18) of the output curve alternately move away from the output curve in different directions. The security element comprises a planar motif region (20) having a plurality of optically active elements (30, 32, 34, 36), which in each case steer incident light in a preferred direction. One motion segment (22) in form of a partial region of the planar motor region (20) is assigned to the segments (18) of the output curve of the planar motif region (20), in which the optically effective elements (30, 32, 34, 36) are arranged and oriented such that from the first viewing direction the optically effective elements show the output curve together with the contiguous segments (18), and from viewing directions tilted aroundthe pre-defined axis, the optically effective elements show curve representations, in which the segments (18) are alternately situated in different directions, and at an increasing tilting angle, areincreasingly situated further away from the output curve.

Description

technical field [0001] The invention relates to an optically variable security element for securing objects of value, a method for producing such a security element and a correspondingly equipped data carrier. Background technique [0002] For protection, data carriers, such as value or identity documents, or other items of value, such as branded goods, are usually provided with a security element which allows verifying the authenticity of the data carrier and at the same time serves as protection against unauthorized reproduction. Security elements with view-dependent utility play a special role in protecting authenticity, since even the most modern copiers cannot reproduce it. Here, the security element is equipped with an optically variable element, which conveys a different image impression to the viewer at different viewing angles and, depending on the viewing angle, displays eg another color or brightness impression and / or another graphic pattern. [0003] In this res...

AI Technical Summary

Problems solved by technology

However, such counter-text is less conspicuous, increasing the risk for counterfeiters to use, for example, authentic security elements from banknotes of lower value to counterfeit banknotes of higher value without attracting the attention of untrained or cursory viewers

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