Unlock instant, AI-driven research and patent intelligence for your innovation.

Optically variable security element with reflective surface area

A security element and optical technology, applied in the field of security elements, can solve the problems of reduced gloss and low area ratio

Active Publication Date: 2022-08-09
GIESECKE & DEVRIENT CURRENCY TECHNOLOGY GMBH
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In an aperiodic arrangement, diffraction effects are avoided as much as possible, for which a higher number of micromirrors is usually required in order to fill a given face area, which results in an area of ​​smooth mirror surface versus (virtually) rounded edge area ratio is lower and this leads to a reduction in gloss

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Optically variable security element with reflective surface area
  • Optically variable security element with reflective surface area
  • Optically variable security element with reflective surface area

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0046] The invention will now be explained on the basis of the example of a security element for banknotes. to this end, figure 1 A schematic illustration of a banknote 10 with an optically variable security element 12 in the form of a stick-on transfer element according to the invention is shown. Of course, however, the invention is not limited to transfer elements and banknotes, but can be used in all types of security elements, such as labels on merchandise and packaging or for the protection of documents, identity cards, passports, credit cards, health cards, and the like. In the case of bank notes and similar documents, in addition to the transfer element, for example, security elements which are designed as security threads or security strips come into consideration.

[0047] figure 1 The security element 12 shown in is itself constructed very flat and has a maximum height difference of about 10 μm, but still gives the observer a clear three-dimensional impression of t...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
Sizeaaaaaaaaaa
Login to View More

Abstract

The invention relates to an optically variable security element (12) for the protection of items of value, which has a carrier (22) with a reflective surface area (20), the extent of which defines the x-y plane and a z-axis perpendicular to the x-y plane, wherein the reflective surface area (20) comprises a plurality of reflective sub-regions (30) and each sub-region (30) has a plurality of reflective facets (32) of the same orientation ), and the orientation of each facet (32) relative to the x-y plane is determined by the data of its normalized normal vector (n) whose projection into the x-y plane defines the facet's inclination direction (r), the length of the facet (L) is the dimension of the facet along the inclined direction, the width of the facet (B) is the dimension of the facet perpendicular to the inclined direction in the x-y plane, and the height of the facet ( H) is the dimension of the facet in the z direction. According to the invention, in the reflective subregion ( 30 ), the facets ( 32 ) of the same orientation have a reduced length (L) and a reduced height (H) along their common direction of inclination (r). layout.

Description

technical field [0001] The invention relates to an optically variable security element for the protection of a value item, which has a carrier with a reflective surface area that contains a plurality of reflective sub-regions, wherein each sub-region has Multiple reflective facets of the same orientation. Background technique [0002] Data carriers, such as documents of value or license documents, or other items of value, such as branded goods, are often provided with a security element in order to achieve protection, which enables verification of the authenticity of the data carrier and simultaneously serves as a Protection of permitted imitations. [0003] Security elements with a viewing angle-dependent or three-dimensional appearance play a special role in authenticity protection, since they cannot be reproduced even with the most modern copiers. For this purpose, the security element is equipped with optically variable elements which give the observer different image ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
IPC IPC(8): B42D25/328B42D25/373B42D25/364
CPCB42D25/328B42D25/373B42D25/364
Inventor R.德梅尔C.富泽K.H.谢雷尔M.R.J.谢雷尔
Owner GIESECKE & DEVRIENT CURRENCY TECHNOLOGY GMBH