Diffractive security system with individualised code

摘要

The safety element (1) has a region (15) with a diffractive surface relief provided with reflection layer in the safety element layers displaying visible information for naked eyes. The region has optically and machine readable codes that are not visible from naked eye. The other region (18) of the safety element has a metallic reflection layer in the form of Radio frequency identification antenna and forms the reflection layer of the optical variable element. An INDEPEDENT CLAIM is also included for a method for amplification of forgery-proof characteristic of a safety document.