Optical encryption by means of the Talbot array illuminator

John Fredy Barrera; Rodrigo Henao; Zbigniew Jaroszewicz; Andrzej Kolodziejczyk

doi:10.1117/12.622095

23 September 2005 Optical encryption by means of the Talbot array illuminator

John Fredy Barrera, Rodrigo Henao, Zbigniew Jaroszewicz, Andrzej Kolodziejczyk

Proceedings Volume 5954, Optical Security Systems; 59540I (2005) https://doi.org/10.1117/12.622095
Event: Congress on Optics and Optoelectronics, 2005, Warsaw, Poland

Abstract

The work presents the encryption process in the optical arrangement with the Talbot array illuminator (TAIL). The object to be encrypted is multiplicated, forming a periodical structure. Then the obtained periodical structure is placed in an optical set-up with a TAIL. The encryption is based on the Fresnel diffraction behind the TAIL. The encrypted image has a form resembling an elementary cell of the amplitude sampling filter. The decryption is based on the Talbot effect.

Citation Download Citation

John Fredy Barrera, Rodrigo Henao, Zbigniew Jaroszewicz, and Andrzej Kolodziejczyk "Optical encryption by means of the Talbot array illuminator", Proc. SPIE 5954, Optical Security Systems, 59540I (23 September 2005); https://doi.org/10.1117/12.622095

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