4 May 2007 Polarization-holographic protection system
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Abstract
With the purpose to increase a level of protection of the important documents, securities, industrial goods, etc. from counterfeiting the polarization-holographic system of protection is developed. The suggested approach is based on new physical principles and allows a level of protection against counterfeiting to be increased. The technology of obtaining protective elements and also a device for the definition of authenticity of these elements has been developed. The suggested system of protection uses specially synthesized polarization-sensitive materials and polarization-holographic elements with special properties. 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 polarization-holographic protective element by optical methods is impossible in principle which complicates their counterfeiting.
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George A. Kakauridze, Barbara N. Kilosanidze, "Polarization-holographic protection system", Proc. SPIE 6540, Optics and Photonics in Global Homeland Security III, 65400I (4 May 2007); doi: 10.1117/12.719013; https://doi.org/10.1117/12.719013
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