Abstract:
The invention relates to security technologies, in particular, holographic protection systems and can be applied to the high level protection of products from counterfeits. The proposed polarization-holographic protection system includes polarization-holographic protective elements, in which a polarization code is recorded and a device for identification of this code. The recording of a code on the polarization-holographic protective element is done by a polarization-holographic method in the form of one concrete combination of polarization state of two recording beams that is preselected from a great number of combinations of polarization states. The reading laser beam (3), when incident on the polarization-holographic protective element (4), diffracts on it and the polarization state of the diffracted beams is the code for identification of the authenticity of the element. Authenticity of a protective element is carried out by means of a special identifying device comprising a polarization-holographic element (5).