METHOD AND DEVICE FOR MARKING OBJECTS AND MATERIALS

摘要

The method for marking materials comprises: a step (210) for generation of a code, a step (215) for random selection of at least one zone of said material and a step (220) for marking the surface or the core of each zone of the material with a laser beam to represent the code thereon in a manner imperceptible to the naked eye. The random selection step of at least one zone of the material is preferably carried out for each piece of material to be marked. During the step of generation of a code, a two-dimensional barcode is preferably generated and during the marking step, the barcode is represented in two dimensions. According to some embodiments, the method further comprises a step of marking the material in a manner visible to the naked eye, a random selection is made of at least one part of a mark visible to the naked eye and/or said visible mark comprises information relating to the position of at least one zone in which the code imperceptible to the naked eye is represented.