Loading patent…
AssigneeRolic AG
InventorsMartin Schadt, Hubert Seiberle
Estimating the term…
A component has a substrate (1) made of a transparent material, for example glass. On this layer (1), there is a linear polarizer (2) on which there is a layer (3) of a photo-oriented polymer network (PPN)(=LPP) which is oriented in locally varying fashion via its surface which covers the substrate. The layer (3) is adjoined by an anisotropic layer (4) of cross-linked liquid-crystal monomers. This layer (4) then has a molecular arrangement whose orientation is defined by the underlying orientation layer (3). The layer (4) will have been photocross-linked by exposure to a suitable wavelength of light, with the result that the molecular orientation defined by the PPN layer (3) is fixed. The element, denoted as a whole by 7, can then be used as an optical component which is protected against forgery, it being possible for the orientation pattern of the liquid-crystal layer or the optical information stored therein to be made visible by means of an external polarizer (5), for example.
1-31. (canceled)
An element for protection against forgery or copying, including:
An optical component comprising an optically anisotropic layer which is formed by liquid-crystal molecules, wherein the optically anisotropic layer contains fluorescent molecules.
An element for protection against forgery or copying comprising an optical component comprising an optically anisotropic layer which is formed by liquid-crystal molecules, wherein the optically anisotropic layer contains fluorescent molecules.
An optical component, containing a birefringent liquid-crystal layer which has at least two regions with different optical axes, wherein an optical delay of the liquid-crystal layer in the individual regions depends differently on an angle of observation.
An element for protection against forgery or copying comprising an optical component comprising a birefringent liquid-crystal layer which has at least two regions with different optical axes, wherein an optical delay of the liquid-crystal layer in the individual regions depends differently on an angle of observation.
An element for protection against forgery or copying, being arranged on a substrate and comprising an optical anisotropic layer which has at least two regions with different optical axes, wherein the substrate is a reflective polarizer.
A device for protection against forgery or copying comprising an element and an analyzer, wherein the analyzer and the element are arranged on a single substrate.
Dependencies are inferred from the claim text.