Optical security device
AssigneeRolic AG
InventorFranco Moia
Life of this patent
Estimating the term…
Abstract
In order to provide comprehensive and multi-purpose security, an optical security device is provided that comprises a substrate and at least a first optically structured layer. The optical security device may provide first, second and third optical inspection levels, including a first inspection level where an optical effect can be discerned with the naked eye, a second level in which an object can be discerned with the aid of an optical inspection tool, and a third level in which an encrypted object can be discerned with a decrypting optical inspection tool. The first layer may be constructed as a retarder plate of LCP material, having an array of elemental areas with different predetermined orientations.
Claims22
An optical authentication device in combination with an inspection tool,
- wherein the authentication device comprises at least a first layer of optically anisotropic material which is selectively oriented in different orientations over its area such as to encrypt an object therein;
- and
- wherein the inspection tool includes a further layer of optically anisotropic material which is selectively oriented in different orientations over its area for decrypting the object such that the object can be viewed when the authentication device is viewed through the inspection tool.
An optical authentication device in combination with an inspection tool,
- wherein the authentication device comprises at least a first layer of optically anisotropic material which is selectively oriented in different orientations over its area such as to encrypt an object therein;
- and
- wherein the inspection tool is adapted to provide a light path or light beam having an optical parameter that is non-uniform over its width such as to cooperate with said optical ansiotropic material to enable viewing of the encrypted object.
Dependencies are inferred from the claim text.