Security devices based on liquid crystals doped with a colour dye |
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Authors: | C. Carrasco-Vela X. Quintana E. Otón M. A. Geday J. M. Otón |
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Affiliation: | 1.ETSI Telecomunicación,Universidad Politécnica de Madrid,Madrid,Spain |
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Abstract: | Liquid crystal properties make them useful for the development of security devices in applications of authentication and detection of fakes. Induced orientation of liquid crystal molecules and birefringence are the two main properties used in security devices. |
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