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Optically variable security element

An anti-counterfeiting element and optical technology, applied in the field of manufacturing such anti-counterfeiting elements, data carriers, and optically variable patterns, can solve the problems of inability to use valuables economically, high technological requirements, and inability to combine anti-counterfeiting features.

Active Publication Date: 2019-12-06
GIESECKE & DEVRIENT CURRENCY TECHNOLOGY GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since in the security element not only a grid of miniature images has to be produced, but also perfectly aligned grids of microlenses, concave mirrors or aperture masks, this micro-optical patterning is critical to the manufacturing process. The workmanship is very demanding and cannot be used economically for all types of valuables, or cannot be combined with other security features

Method used

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  • Optically variable security element
  • Optically variable security element
  • Optically variable security element

Examples

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Embodiment Construction

[0138] The invention will now be described using the example of a security element for banknotes. to this end, figure 1 A schematic view of a banknote 10 with an optically variable security element 12 according to the invention is shown. The security element 12 has a metallic appearance with an additional colored windmill-like blade pattern 14 . Even a slight upward or downward tilt 16 of the bank note produces a very noticeable rotational movement 18 of the coloring blade 14 here.

[0139] The structure of the security element of the present invention and the production of the conspicuous color rotation effect will be described in more detail below with reference to FIGS. 2 and 3. FIG. The sectional view obtained by cutting the anti-counterfeiting element along the line B-B in Fig. 2(a). To illustrate the principles of the invention, a single raised embossing element 34 is further shown in Fig. 3(a), and Figs. Location.

[0140]The security element 12 comprises an optica...

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PUM

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Abstract

The invention relates to an optically variable security element (12) for securing valuable objects, said element comprising a substrate (28) having opposing first and second main surfaces, and an An optically variable structure (20) on a major surface and including an embossed structure (22) and a coating (24). According to the invention, said coating (24) comprises at least one linear pattern (30) and a background layer (26) in contrast to said linear pattern (30); said embossed structure (22) comprises a raised and / or a two-dimensional pattern of recessed embossed elements (34); said coating (24) and said embossed structure (22) are combined such that substantially each embossed element (34) has a line at least one line segment (36) of a line (32) in a pattern (30); and the parameters 'position of said line segment on said embossed element', 'orientation of said line segment on said embossed element' and at least one parameter of 'form of said line segment' varies locally within the scope of said optically variable structure (20), such that when the security element (12) is tilted, the line pattern (30) produces a movement effect, Especially pulsating or swirling effects.

Description

technical field [0001] The present invention relates to an optically variable security element for securing a valuable object, comprising a substrate having opposing first and second major surfaces, and arranged on the first major surface, comprising an embossed pattern and Optically variable patterns of coatings. The invention also relates to a method for producing such a security element, and to a data carrier having such a security element. Background technique [0002] For protection purposes, data carriers such as documents of value or certificates, or other valuables, such as well-known goods, often have security elements which allow verification of the authenticity of the data carrier and at the same time serve as a means of protection against illegal copying . [0003] Security elements with viewing angle-dependent effects play a special role in security since they cannot be reproduced even with the most modern reproduction devices. In this case, the security elem...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B42D25/324B42D25/342
CPCB42D25/324B42D25/342B42D25/23B42D25/24B42D25/26B42D25/29B42D25/351B42D25/425B42D25/435G02B17/002
Inventor C.富瑟A.海涅M.英霍夫A.凯克-安格雷尔W.德夫勒P.弗朗兹
Owner GIESECKE & DEVRIENT CURRENCY TECHNOLOGY GMBH