Visually variable security element
AssigneeTesa Scribos GmbH
InventorsStefan Borgsmüller, Kay Schulte-Wieking
Life of this patent
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Abstract
Methods manufacture an optically variable security element by breaking down a first motif into first motif elements, assigning the first motif elements first directional degrees of reflection that encode the first motif, wherein a relief layer having a multiplicity of single visual elements having a respective single element surface is produced and divided into reflection areas, wherein first reflection areas of different single element surfaces are assigned to the first motif, and the first reflection areas associated with the first motif are provided with the first directional degrees of reflection.
Claims26
A method for producing an optically variable security element comprising:
- decomposing a first pattern into first subpatterns;
- assigning first directional reflectivities, that encode the first pattern, to the first subpatterns,
- decomposing a second pattern into second subpatterns;
- assigning second directional reflectivities, that encode the second pattern, to the second subpatterns;
- producing a relief layer having a multiplicity of individual optical elements, each optical element having an individual elementary surface;
- subdividing the individual elementary surface into reflectance regions;
- assigning first reflectance regions of different individual elementary surfaces to the first pattern;
- providing the first reflectance regions assigned to the first pattern with the first directional reflectivities;
- assigning second reflectance regions of different individual elementary surfaces to the second pattern;
- and
- providing the second reflectance regions assigned to the second pattern with the second directional reflectivities.
An optically variable security element comprising:
- a relief layer comprising a multiplicity of individual optical elements, each optical element having an individual elementary surface, wherein the individual elementary surfaces are subdivided into reflectance regions;
- a first pattern decomposed into first subpatterns;
- first directional reflectivities, that encode the first pattern, assigned to the first subpatterns;
- first reflectance regions of different individual elementary surfaces assigned to the first pattern, wherein first reflectance regions assigned to the first pattern are provided with the first directional reflectivities;
- a second pattern decomposed into second subpatterns;
- second directional reflectivities, that encode the second pattern, assigned to the second subpatterns;
- second reflectance regions of different individual elementary surfaces assigned to the second pattern, wherein the second relfectance regions assigned to the second pattern are provided with the second directional reflectivities.
A method for producing an optically variable security element comprising:
- decomposing a pattern into subpatterns;
- assigning directional reflectivities, that encode the pattern, to the subpatterns;
- producing a relief layer having a multiplicity of individual optical elements, each optical element having an individual elementary surface;
- subdividing the individual elementary surface into reflectance regions;
- assigning the reflectance regions of different individual elementary surfaces to the pattern;
- and
- providing the reflectance regions assigned to the pattern with the directional reflectivities,
- wherein positions of the reflectance regions on the individual elementary surfaces are determined by determining a position of a reflection of a directional reflectance of a nondiffuse light source on each of the individual elementary surfaces from a predetermined observer position and arranging the reflectance regions assigned to the pattern around the positions of the reflections of the directional reflectances.
An optically variable security element comprising:
- a relief layer comprising a multiplicity of individual optical elements, each optical element having an individual elementary surface, wherein the individual elementary surfaces are subdivided into reflectance regions;
- a pattern decomposed into subpatterns;
- directional reflectivities, that encode the pattern, assigned to the subpatterns;
- and
- reflectance regions of different individual elementary surfaces assigned to the pattern, wherein the reflectance regions assigned to the pattern are provided with the directional reflectivities,
- wherein at least some individual optical elements are shaped in the form of spherical sections or cylindrical sections.
Dependencies are inferred from the claim text.