Improved raman-active taggants and their recognition

Details Improved raman-active taggants and their recognition Improved raman-active taggants and their recognition

G - Physics

01

N

G01N 21/65 (2006.01) B41M 3/14 (2006.01) G07D 7/12 (2006.01) B42D 15/00 (2006.01) G01J 3/44 (2006.01)

Patent

CA 2443756

An organic or organoelement, linear or branched, monomeric or polmeric composition of matter having a Raman-active component in the form of particles. The particles having a maximum dimension of 50 µmum. The Raman- active compound is applied to a substrate. When the Raman-active compound is exposed to a laser light wavelength which is batochromically well beyond a spectral region of maximum absorbance of said Raman-active compound. Raman scattering can be detected.

L'invention concerne une composition polymère ou monomère, linéaire ou ramifié, à organoéléments ou éléments organiques, renfermant un composé Raman actif sous forme de particules d'une dimension maximale de 50 µm. Ce composant Raman actif est appliqué sur un substrat. Lorsque ce composant est exposé à une longueur d'onde de lumière laser, dont le déplacement bathochromique est bien au-delà d'une région spectrale d'absorbance maximale dudit composé Raman actif, la diffusion Raman peut être détectée.

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