Optically Variable Element, in Particular Security Element
2 Assignments
0 Petitions
Accused Products
Abstract
An optically variable element, in particular a security element, has a transparent carrier layer, an at least partly transparent reflective layer formed on the carrier layer, and a transparent embedding layer formed on the reflective layer. The reflective layer is structured in a motif region such that the layer forms a multiplicity of partly transparent micromirrors which present a perceptible motif upon plan viewing of the motif region due to specular reflection of incident light. The refractive indices of the carrier and embedding layers differ in the visible spectrum by no more than 0.2 in order that the motif perceptible in plan view is not recognizable upon transmission viewing of the motif region.
20 Citations
38 Claims
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1-19. -19. (canceled)
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20. An optically variable element having
a transparent carrier layer; -
an at least partly transparent reflective layer which is formed on the carrier layer; and a transparent embedding layer which is formed on the reflective layer; wherein the reflective layer is structured in a motif region such that said layer forms a multiplicity of partly transparent micromirrors which present a perceptible motif upon plan viewing of the motif region due to specular reflection of incident light; and wherein the refractive indices of the carrier layer and of the embedding layer differ in the visible spectrum by no more than 0.2 in order that the motif perceptible in plain view is not recognizable upon transmission viewing of the motif region. - View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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Specification