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Please use this identifier to cite or link to this item: http://eprint.iitd.ac.in/handle/2074/1147

Title: Optical phase encryption by phase contrast using electrically addressed spatial light modulator
Authors: Nishchal, Naveen Kumar
Joseph, Joby
Singh, Kehar
Keywords: Phase imaging
Phase contrast
Data security
Encryption
Decryption
Phase conjugation
Spatial light modulator
Issue Date: 2003
Citation: Optics Communications, 217(1-6), 117-122
Abstract: We report the use of an electrically addressed liquid crystal spatial light modulator (EALCSLM) operating in the phase mode as a phase-contrast filter (PCF). As an application, an optical phase encryption system has been implemented. We encrypt and decrypt a two-dimensional phase image obtained from an amplitude image. Encrypted image is holographically recorded in a Barium titanate crystal and is then decrypted by generating through phase conjugation, a conjugate of the encrypted image. The decrypted phase image is converted into an amplitude image using an EASLM as a PCF. The idea has been supported by the experimental results.
URI: http://eprint.iitd.ac.in/dspace/handle/2074/1147
Appears in Collections:Physics

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