1 October 2004 Decrypting binary phase patterns by amplitude
Author Affiliations +
Optical Engineering, 43(10), (2004). doi:10.1117/1.1783277
A method for decrypting a binary phase-only mask using an amplitude-only spatial light modulator key is proposed. The system is based on a double passage through a generalized phase contrast setup. A binary amplitude key is converted to phase for decrypting a binary phase-only encrypted pattern on the first passage. The decrypted phase pattern is subsequently converted to an intensity pattern on the second passage. A compact dual-path system, applicable in reflection geometry, is suggested for this decryption operation.
Jesper Glückstad, Vincent Ricardo Daria, Peter John L. Rodrigo, "Decrypting binary phase patterns by amplitude," Optical Engineering 43(10), (1 October 2004). http://dx.doi.org/10.1117/1.1783277

Binary data

Phase shift keying

Spatial filters

Spatial light modulators

Amplitude modulation

Optical filters

Phase modulation

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