Optical devices for authentication and methods of making same
AssigneeDublin Institute of Technology
InventorsIzabela NAYDENOVA, Monika ZAWADZKA, Suzanne MARTIN, Dervil CODY, Vincent TOAL, Tatsiana MIKULCHYK
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Abstract
The invention optical device comprising a self-processing photopolymer material configured to produce a variable two- or three- dimensional diffraction pattern when said material is illuminated by a light source. The invention provides a new material science and process technology which produces a serialisable anti-counterfeit optical device, based on a self-processing photopolymer.
Claims27
A fully transparent optical device comprising a self-processing photopolymer material patterned to diffract light from the volume of the material to generate a 2D or a 3D image when illuminated by a light source, wherein the optical device is patterned by using a single laser beam.
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14-16. (canceled)
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A method of producing a diffractive optical element, DOE, from an optical device comprising a photopolymer material, the method comprising:
- optically recording a pattern in the photopolymer material by projecting a single beam of laser light through the pattern onto the photopolymer material so as to cause a refractive index variation in the volume of the photopolymer material, wherein the material is fully or partially polymerized at the end of the optical recording.
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Dependencies are inferred from the claim text.