Method of determining a characteristic of a security...

Details Method of determining a characteristic of a security... Method of determining a characteristic of a security...

G - Physics

07

D

G07D 7/12 (2006.01) G07D 7/10 (2006.01)

Patent

CA 2395989

A method of determining at least one characteristic of one or more security documents such as banknotes, each security document including a sheet-like substrate of plastics material and opacifying layers applied to opposing faces of the substrate, the method comprising the steps of:(a) projecting radiation from a radiation source into the substrate of each security document for propagation therein, the opacifying layers acting to guide the projecting radiation within the substrate; (b) detecting a radiation emission of the substrate of each security document, the radiation emission resulting from the propagated radiation; and (c) analysing one or more characteristics of the radiation emission.

L'invention concerne un procédé permettant de déterminer au moins une caractéristique d'un ou de plusieurs documents de sécurité, tels que des billets de banque, chaque document de sécurité comprenant un substrat du type feuille fabriqué dans une matière plastique et des couches opacifiantes appliquées sur des surfaces opposées du substrat. Le procédé comprend les étapes consistant: (a) à projeter un rayonnement à partir d'une source de rayonnement dans le substrat de chaque document de sécurité afin que ce rayonnement se propage à l'intérieur du substrat, les couches opacifiantes guidant le rayonnement projeté à l'intérieur du substrat; (b) à détecter une émission de rayonnement du substrat de chaque document de sécurité, l'émission de rayonnement résultant du rayonnement propagé; et (c) à analyser une ou plusieurs caractéristiques de l'émission de rayonnement.

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