COATING CONTAINING ALKOXYSILOXANES FOR OPTICAL IDENTIFICATION AND TRACEABILITY

摘要

The invention relates to a method for checking if a solid substrate, called substrate to be authenticated, is coated with an alkoxysyloxane-based varnish including at least one given photoluminescent compound in the form of nanoparticles, the method comprising the following successive steps: a) exposing said substrate to be authenticated to an exciting radiation; b) acquiring the luminescence spectrum thereof; c) revealing an optical signature by comparing the luminescence spectrum of the substrate to be authenticated with that obtained from a substrate coated with the alokoxysyloxane-based varnish containing the at least one given photoluminescent compound in the form of nanoparticles, or reference substrate. The invention also relates to the use of this method for authenticating and/or detecting counterfeit objects such as optical lenses.