Databaerer med et optisk identifikasjonstrekk, samt fremgansmaate for fremstilling og testing av nevnte databaerer

摘要

The present invention relates to a data carrier (identification card, bank card, credit card, etc.) in which information is provided in an inner volume area by means of a laser beam, the information being visible in the form of changes in the optical properties of the carrier material due to an irreversible change in the material caused by the laser beam and to a method for producing the data carrier and for testing it.