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12 June 2001 Creation of hybrid optoelectronic systems for document identification
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Proceedings Volume 4425, Selected Papers from the International Conference on Optoelectronic Information Technologies; (2001) https://doi.org/10.1117/12.429696
Event: International Conference on Optoelectronic Information Technologies, 2000, Vinnytsia, Ukraine
Abstract
Use of security devices based on a joint transform correlator (JTC) architecture for identification of credit cards and other products is very promising. The experimental demonstration of the random phase encoding technique for security verification shows that hybrid JTCs can be successfully utilized. The random phase encoding technique provides a very high protection level of products and things to be identified. However, the realization of this technique is connected with overcoming of the certain practical problems. To solve some of these problems and simultaneously to improve the security of documents and other products, we propose to use a transformed phase mask (TPM) as an input object in an optical correlator. This mask is synthesized from a random binary pattern (RBP), which is directly used to fabricate a reference phase mask (RPM). To obtain the TPM, we previously separate the RBP on a several parts (for example, K parts) of an arbitrary shape and further fabricate the TPM from this transformed RBP. The fabricated TPM can be bonded as the optical mark to any product or thing to be identified. If the RPM and the TPM are placed on the optical correlator input, the first diffracted order of the output correlation signal is containing the K narrow autocorrelation peaks. The distances between the peaks and the peak's intensities can be treated as the terms of the identification feature vector (FV) for the TPM identification.
© (2001) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Leonid I. Muravsky, Taras I. Voronyak, Yaroslav P. Kulynych, Olexander P. Maksymenko, and Ignat Y. Pogan "Creation of hybrid optoelectronic systems for document identification", Proc. SPIE 4425, Selected Papers from the International Conference on Optoelectronic Information Technologies, (12 June 2001); https://doi.org/10.1117/12.429696
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