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Method for manufacturing a security element

An anti-counterfeiting component, sophisticated technology, applied in mirrors, instruments, printing, etc., can solve problems such as roughness, abstract blur, unrealistic visual impression, etc.

Active Publication Date: 2021-03-23
GIESECKE & DEVRIENT CURRENCY TECHNOLOGY GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However complex objects are often rough, abstract and blurred in this display structure and leave an unrealistic visual impression

Method used

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  • Method for manufacturing a security element
  • Method for manufacturing a security element
  • Method for manufacturing a security element

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0039] The invention is explained below on the example of a security element for banknotes and other value documents. figure 1 (a) shows a schematic view of a banknote 10 with a security element 12 according to the invention for this purpose, said security element 12 being placed on figure 1 It is shown in detail in (b). The security element 12 shows a reflected raised view of the sculpture 14 when viewed with light, which shows a very realistic and detailed image through its coarse and fine image parts described more precisely below. image.

[0040] In order to realize this revealing image, the security element 12 contains a reflective surface area 16 which has a plurality of small, inclined micromirrors 18 which are positioned at figure 1 Schematically labeled in (b) for description. In fact, the size of the micromirror 18 is below the resolution limit of the naked eye, so the micromirror 18 itself cannot be identified. Micromirrors 18 have, for example, only an edge len...

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PUM

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Abstract

The invention relates to a method for producing a security element (12) which has a reflective surface area (16) which can be seen as three-dimensional for a viewer and has a relative to its real A relief pattern in the form of a preset three-dimensional pattern of a convex and / or concave surface of a spatial shape, wherein, in the method, a two-dimensional is generated in the x-y plane from the preset three-dimensional pattern A first partial image (20) of a planar projection (22) of the pattern and a two-dimensional second partial image (24) with fine outlines is generated within the projection of the pattern; for the first partial image (20 ) presets a rough uplift G(x,y) for the planar projection (22) of the pattern; a fine uplift f for each fine contour line (26) is preset for the second partial image (24) i (x, y), wherein, i=1...N, and N is the number of preset fine contour lines (26); by rough uplift G(x, y) and fine uplift f i (x,y) through the main function M to calculate the relief uplift R(x,y)=M[G(x,y),f i (x,y)], the main function M describes a rough uplift G(x,y) and N fine uplifts f i (x, y) (i=1...N); y) Determined local mirror slope.

Description

technical field [0001] The invention relates to a method for producing a security element (or called a security element or security element) having a reflective surface region which can be perceived by a viewer as a three-dimensional relief pattern, the relief The pattern has a surface that is convex and / or concave relative to its real spatial shape in the form of a predetermined three-dimensional pattern. Background technique [0002] Information carriers, such as securities or certificates, or other valuables, such as brand-name goods or coins, are protected by a security element for checking the authenticity of the information carrier and at the same time for preventing unauthorized copy. Security elements with viewing-angle-dependent or three-dimensional appearing images play an important role in security protection since they cannot be reproduced by state-of-the-art reproduction equipment. [0003] As described in patent document WO 2011 / 066990, patterns that appear t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B42D25/425B42D25/45B42D25/324B42D25/328B42D25/373B42D25/23B42D25/24B42D25/29G02B5/09G02B30/40G02B30/60
CPCB42D25/23B42D25/24B42D25/29B42D25/324B42D25/328B42D25/373B42D25/425B42D25/45G02B5/09
Inventor K.H.谢勒
Owner GIESECKE & DEVRIENT CURRENCY TECHNOLOGY GMBH