Valuable document

G - Physics – 07 – D

Patent

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G07D 7/12 (2006.01) B41M 3/14 (2006.01) B42D 15/10 (2006.01) C09D 11/02 (2006.01) C09K 11/02 (2006.01) D21H 21/48 (2006.01) G06K 19/14 (2006.01)

Patent

CA 2374814

The invention relates to a document of value, such as a paper of value, ID card or the like, having at least one authenticity feature in the form of a luminescent sub-stance. The luminescent substance has particles consisting of a dye-laden molecular sieve whose structure forms an optical resonator. In said resonator at least one dye can be excited to show stimulated emission, the dye being incorporated in the cavi-ties of the molecular sieve or located in or on the internal and external surfaces of the molecular sieve, and the transition to stimulated emission being accompanied by a detectable change in the luminescent properties of the dye.

L'invention concerne un document de valeur, tel qu'un titre, une carte d'identité ou un document similaire, présentant au moins une caractéristique d'authenticité sous forme d'une substance luminescente. La substance luminescente contient des particules constituées d'un tamis moléculaire chargé en colorants et dont la structure forme un résonateur optique dans lequel il est possible d'amener au moins un colorant à une émission stimulée. Le document de valeur selon l'invention est caractérisé en ce que le colorant est intégré aux cavités du tamis moléculaire ou se trouve dans ou sur les surfaces internes et externes du tamis moléculaire et en ce que le passage à l'émission stimulée s'accompagne d'une modification décelable des propriétés de luminescence du colorant.

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