Element for security document comprising an optical structure
AssigneeArjowiggins Security
InventorMichel Camus
Life of this patent
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Abstract
A security element adapted for integration into a security document. The security element having a substrate with a first face and a second face. An optical structure is disposed on the first face, and at least two patterns are inscribed on the second face. The two patterns are at least partially identical. The first pattern is observable at a first position on the second face through the optical structure along a first viewing angle. The second pattern is observable at a second position on the second face through the optical structure along a second viewing angle. Authenticity of the document may be verified by comparing the observed patterns.
Claims21
A security element comprising:
- a substrate having a first face and a second face, the first face equipped with an optical structure, the second face having at least a first pattern and a second pattern inscribed thereon, the first and the second patterns being at least partially identical;
- wherein the first pattern is observable at a first position on the second face through the optical structure along a first viewing angle;
- and
- wherein the second pattern is observable at a second position on the second face through the optical structure along a second viewing angle.
A method of authenticating a security document having a security element, the security element comprising a substrate having a first face and a second face, the first face equipped with an optical structure, the second face having at least a first pattern and a second pattern inscribed thereon, the first and the second patterns being at least partially identical, the method comprising:
- observing the first pattern at a first position on the second face through the optical structure along a first viewing angle;
- observing the second pattern through the optical structure at a second position on the second face along a second viewing angle;
- and
- evaluating the authenticity of the security document by comparing the first and the second observed patterns.
Dependencies are inferred from the claim text.