Improved luminescence characteristics detector

Details Improved luminescence characteristics detector Improved luminescence characteristics detector

G - Physics

07

D

G07D 7/12 (2006.01) G01N 21/64 (2006.01)

Patent

CA 2404624

The invention discloses an improved method and a device implementing said method for the authentication of security documents or articles carrying luminescent marker compounds which show a time-deferred emission characteristic. The method allows a rapid extraction of characteristic luminescence parameters, such as emission intensity and time constants. The method is not sensitive to perturbations by ambient light and reduces the optical filtering requirements.

La présente invention concerne des perfectionnements apportés à un procédé, ainsi que le dispositif le mettant en oeuvre, lequel procédé vise à authentifier des documents ou des articles de sécurité marqués de composés luminescents présentant une caractéristique d'émission différée dans le temps. Le procédé permet une extraction rapide des paramètres de luminescence caractéristique tels que l'intensité de l'émission et les constantes de temps. Ce procédé n'est pas sensible aux perturbations par la lumière ambiante, tout en impliquant une batterie de filtrages optiques moins importante.

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