Optically variable device mastering system, method of...

G - Physics – 02 – F

Patent

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G02F 3/00 (2006.01)

Patent

CA 2637944

A method is provided for mastering optically variable devices (OVDs) used to authenticate optical discs. The method generally includes the steps of providing a laser beam recorder (LBR), introducing a substrate to the LBR, and exposing a portion of the substrate to the LBR. The mastering system thus includes the LBR, which has a laser that emits a beam, a processor or computer for programming or otherwise controlling the beam in order to expose the substrate and create the desired optical effect. Depending on the material used for the substrate, the exposure is then developed, if necessary, and processed to generate a master for the OVD. The OVD can then be replicated in order to provide authentic resultant products or articles, such as optical discs.

L'invention concerne un procédé permettant de graver par pressage des dispositifs optiquement variables (OVD) utilisés pour authentifier des disques optiques. Le procédé de l'invention comprend généralement les étapes consistant à: fournir un enregistreur d'images à rayon laser (LBR), introduire un substrat dans le LBR, et exposer une partie du substrat au LBR. Le système de gravure par pressage de l'invention comprend le LBR qui comporte un laser émettant un faisceau, un processeur ou un ordinateur pour programmer ou pour commander le faisceau de sorte à exposer le substrat et à créer l'effet optique voulu. En fonction de la matière utilisée pour le substrat, l'exposition est ensuite développée, si nécessaire, et traitée pour générer un disque matrice pour l'OVD concerné. L'OVD peut être ensuite copié de sorte à obtenir des produits ou des articles authentiques, notamment des disques optiques.

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