Use of raman markers for authenticating security documents
AssigneeFabrica Nacional De Moneda Y Timbre- Real Case De La Moneda
InventorsJuan José Romero Fanego, Vicente García Juez, José Francisco Fernández Lozano, Javier Gamo Aranda, Miguel Ángel Rodríguez Barbero, Andrés Ruiz Quevedo, Israel Lorite Villalba
Life of this patent
Estimating the term…
Abstract
The present invention relates to the use of non deactivable security markers comprising the combination of at least two types of nanoparticles of materials presenting Raman effect, wherein said nanoparticles are in a dispersed state or is forming ag glomerates of between 2 and 500 nanoparticles. The invention also relates to security documents, articles or elements incorporating these markers, as well as to a method and system for the detection thereof.
Claims16
-30. (canceled)
A method comprising preparing or labeling a security document, article, or element with a combination comprising at least two types of nanoparticles of material presenting Raman effect, wherein:
- each of the at least two types of nanoparticles is in a dispersed state or is in an agglomeration state forming agglomerates between 2 and 500 nanoparticles where said agglomerates have a size less than 2 microns;
- the at least two types of nanoparticles differ from each other in their chemical composition, in their crystal structure, in their shape, in their size and/or in their dispersed or agglomeration state;
- and
- when the at least two types of nanoparticles differ in their dispersed or agglomerated state, one type of nanoparticles is in a dispersed state and at least one other type of nanoparticles is in an agglomeration state forming agglomerates of between 2 and 500 nanoparticles, or the at least two types of particles form are in an agglomeration state forming agglomerates containing different numbers of nanoparticles between 2 and 500 nanoparticles.
A security element, article, or document comprising a combination of at least two types of nanoparticles of materials presenting Raman effect, wherein:
- each of the at least two types of nanoparticles is in a dispersed state or is in an agglomeration state forming agglomerates between 2 and 500 nanoparticles where said agglomerates have a size less than 2 microns;
- the at least two types of nanoparticles differs from each other in their chemical composition, in their crystal structure, in their shape, in their size and/or in their dispersed or agglomeration state, and
- when the at least two types of nanoparticles differ in their dispersed or agglomerate state, one type of nanoparticles is in a dispersed state and at least one other type of nanoparticles is in an agglomeration state forming agglomerates of between 2 and 500 nanoparticles, or the at least two types of particles form are in an agglomeration state forming agglomerates containing different numbers of nanoparticles between 2 and 500 nanoparticles.
A method for incorporating a combination of at least two types of nanoparticles of materials presenting Raman effect in a security document or article, wherein each of the at least two types of nanoparticles is in a dispersed state or is in an agglomeration state forming agglomerates between 2 and 500 nanoparticles where said agglomerates have a size less than 2 microns, wherein the at least two types of nanoparticles differ from each other in their chemical composition, in their crystal structure, in their shape, in their size and/or in their dispersed or agglomeration state;
- and when the at least two types of nanoparticles differ in their dispersed or agglomerated state, one of the type of nanoparticles is in a dispersed state and the at least one other type of nanoparticles is in an agglomeration state forming agglomerates of between 2 and 500 nanoparticles, or the at least two types of particles form are in an agglomeration state forming agglomerates containing different number of nanoparticles between 2 and 500 nanoparticles,
- wherein said incorporation comprises one of the following steps (i) to (iii):
- (i) incorporating said combination of at least two types of nanoparticles during the manufacturing of the material used to make said security document or article;
- or
- (ii) incorporating said combination of at least two types of nanoparticles as part of an additive which is added to said security document or article;
- or
- (iii) incorporating said combination of at least two types of nanoparticles on a surface of said security document or article.
Dependencies are inferred from the claim text.