8 October 2007 A protection system of a new type
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The polarization-holographic system of protection has been developed. The suggested approach is based on new physical principles, namely on the using of polarization state of light that allows the level of protection of important documents, securities, industrial goods, etc. against counterfeiting to be increased. The system includes polarization-holographic protection elements and a device for the definition of authenticity of these elements. The elements are made on specially synthesized polarization-sensitive materials with certain properties which additionally raise the level of protection. The definition of authenticity is made by means of the analysis of the polarization state of light diffracted on the protective element. The essential advantage of this system is that the copying of the polarization-holographic protective element by optical methods is impossible in principle which complicates their counterfeiting.
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Barbara N. Kilosanidze, Barbara N. Kilosanidze, George A. Kakauridze, George A. Kakauridze, } "A protection system of a new type", Proc. SPIE 6741, Optics and Photonics for Counterterrorism and Crime Fighting III, 67410O (8 October 2007); doi: 10.1117/12.737585; https://doi.org/10.1117/12.737585

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