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US 5,808,758 AGranted
Data carrier with an optically variable element
AssigneeGeisecke & Devrient GmbH
InventorBernhard Solmsdorf
Life of this patent
Estimating the term…
Abstract
A data carrier with an optically variable element has a layer regularly reflecting incident light and including interruptions. A diffusely scattering layer is disposed on the regularly reflecting layer so as to be visible through at least one interruption to provide at least one optically recognizable marking based on the differences in the reflectivities of the two layers at different viewing angles.
Claims20
A data carrier with an optically variable element disposed thereon, the optically variable element comprising:
- a regularly reflecting layer which regularly reflects light incident thereon, the regularly reflecting layer having at least one interruption;
- and
- a diffusely scattering layer which diffusely scatters light incident thereon, the diffusely scattering layer being disposed on the regularly reflecting layer so as to be visible through the at least one interruption in the regularly reflecting layer such that the diffusely scattering layer and the at least one interruption form at least one optically recognizable marking;
- the diffusely scattering layer having a first reflectivity which is substantially constant at all viewing angles and being produced by changing the regularly reflecting surface;
- and
- the regularly reflecting layer having a second reflectivity which is lower than the first reflectivity for at least one viewing angle and higher than the first reflectivity for at least one other viewing angle.
3 more elements
A data carrier with an optically variable element disposed thereon, the optically variable element comprising:
- a regularly reflecting layer which regularly reflects light incident thereon, the regularly reflecting layer having at least one interruption;
- and
- a diffusely scattering layer which diffusely scatters light incident thereon, the diffusely scattering layer being disposed on the regularly reflecting layer so as to be visible through the at least one interruption in the regularly reflecting layer such that the diffusely scattering layer and the at least one interruption form at least one optically recognizable marking;
- the diffusely scattering layer having a first reflectivity which is substantially constant at all viewing angles;
- and
- the regularly reflecting layer being a metal layer, a metallically lustrous layer or a metal-coated layer and having a second reflectivity which is lower than the first reflectivity for at least one viewing angle and higher than the first reflectivity for at least one other viewing angle.
3 more elements
Dependencies are inferred from the claim text.