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US 11,453,234 B2Granted
Security document including an optical security feature
AssigneeCCL Secure Pty Ltd
InventorsKarlo Ivan Jolic, Gary Fairless Power
Life of this patent
Estimating the term…
Abstract
A security document, including: a polymer substrate; at least one print layer disposed on one or both sides of the polymer substrate; and a security feature including an image area embodied within the polymer substrate and at least partially covered by the at least one print layer, wherein the security feature is an optical security feature formed in the image area.
Claims11
A security document, including:
- an opaque polymer substrate having particles disposed therein configured to react to a designated wavelength of light from a light source, wherein the polymer substrate is opaque before reacting to the designated wavelength of light;
- at least one print layer, the print layer being substantially opaque when viewed in reflection, disposed on one or both sides of the opaque polymer substrate;
- and
- a security feature including an image area embodied within the opaque polymer substrate and at least partially covered by the at least one print layer,
- wherein the security feature is an optical security feature which includes markings formed from exposure of the particles to the designated wavelength of light in the image area,
- wherein the particles absorb energy and vaporize the polymer substrate adjacent the particles,
- wherein the markings absorb light to create a dark color and are discernible when illuminated by light and viewed in transmission of said light through the security feature.
4 more elements
A method of manufacturing a security feature for a security document, the method including:
- irradiating an image area embodied within an opaque polymer substrate of a security document with a designated wavelength of light produced from a light source;
- the opaque polymer substrate having particles disposed therein reacting to the designated wavelength of light to form an optical security feature in the image area, wherein the optical security feature includes markings formed from exposure of the particles to the designated wavelength of light in the image area, wherein the particles absorb energy and vaporize the polymer substrate adjacent the particles;
- and
- at least partially covering the image area with at least one print layer, the print layer being substantially opaque when viewed in reflection and being disposed on one or both sides of the polymer substrate, wherein the markings absorb light to create a dark color, which is discernible when illuminated by light and viewed in transmission of said light.
1 more element
Dependencies are inferred from the claim text.