Document authenticating apparatus and method

G - Physics – 07 – D

Patent

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G07D 7/12 (2006.01)

Patent

CA 2399134

A document (e.g. banknote) authenticating apparatus comprises a transport system (32-34, 50, 51) for transporting banknotes. An inspection device (35) is provided past which banknotes are transported by the transport system, the inspection device including a UV source (1) such as a LED and a UV detector (4, 5) arranged to irradiate a banknote and to detect reflected UV respectively. A processor (11) is responsible to the reflected UV to determine the authenticity of the banknote. The inspection device (35) includes a reference surface (3) over which the banknotes are transported in use, the reference surface being exposed to UV radiation from the source (1) in the absence of a banknote so as to generate a reference level signal, and being oriented such that the banknotes are delivered at an acute angle to the surface whereby passage of a banknote across the surface effects a cleaning action on the surface.

Un appareil d'authentification de documents (par ex. un billet de banque) comprend un système d'acheminement (32-34, 50, 51) servant à transporter les billets de banque. Un dispositif d'inspection (35) auprès duquel lesdits billets sont amenés par l'intermédiaire du système d'acheminement, comprend une source d'ultraviolets (1) telle qu'une diode électroluminescente, et un détecteur d'ultraviolets (4, 5) conçu pour irradier un billet de banque et détecter des ultraviolets réfléchis en conséquent. Un processeur (11) est sensible aux ultraviolets réfléchis afin de déterminer l'authenticité dudit billet. Le dispositif d'inspection (35) comprend une surface de référence (3) sur laquelle les billets sont transportés lors de l'utilisation, ladite surface étant exposée à des rayonnements ultraviolets en provenance de la source (1) en l'absence de billet de banque, de manière à engendrer un signal de niveau de référence, et étant orientée de telle façon que les billets sont amenés à un angle précis par rapport à la surface, le passage d'un billet à travers la surface ayant une action nettoyante sur cette surface.

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