Holographic device
AssigneeUniversity Court of the University of St Andrews
InventorsAndrea Di Falco, James Burch
Life of this patent
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Abstract
A holographic security or identification device (10) comprises an object, or a flexible substrate (12) configured to be conformable to a desired, curved shape; and a plurality of structures (14) formed on or in the object to have a desired curved configuration, or formed in or associated with the substrate and arranged to adopt a desired curved configuration when the substrate is conformed to a desired shape, wherein the plurality of structures (14) are configured to receive light (20) of a selected at least one wavelength or range of wavelengths and to produce, using the received light, a desired holographic image (22) for security or identification purposes when in the desired configuration.
Claims22
A holographic security or identification device comprising:
- a flexible substrate configured to be conformable to a desired, curved shape characterized by a gradient;
- a plurality of structures formed in or associated with the flexible substrate and arranged to adopt a desired curved configuration when the flexible substrate is conformed to a desired curved shape,
- wherein the plurality of structures are configured to receive light of a selected at least one wavelength or range of wavelengths and to produce, using the received light, a desired holographic image for security or identification purposes when in the desired curved configuration;
- and
- wherein the plurality of structures are arranged such that the number of structures per unit area and/or the amount of information represented by the structures varies in dependence on the gradient of the desired, curved shape.
A method of producing a holographic or identification device comprising:
- providing a flexible substrate layer configured to be conformed to a desired curved shape characterized by a gradient;
- providing a plurality of structures in or associated with the flexible substrate layer and arranged to adopt a desired curved configuration when the flexible substrate layer is conformed to a desired shape,
- wherein the plurality of structures are configured to receive light of a selected at least one wavelength or range of wavelengths and to produce, using the received light, a desired holographic image for security or identification purposes when in the desired curved configuration, wherein the plurality of structures are arranged such that the number of structures per unit area and/or the amount of information represented by the structures varies in dependence on the gradient of the desired, curved shape.
Dependencies are inferred from the claim text.