Duplication of phase key for random-phase-encrypted volume holograms.
Holographic memory encrypted by an optical random-phase key and decrypted by either the original phase key or a duplicate key is proposed and demonstrated. The duplicate key is made by recording the encryption wave front with angle multiplexing during writing of the hologram. The amount of three-dimensional shifting that is tolerable in the duplicate key is analyzed.
Su
Wei-Chia
WC
Graduate Program in Electro-Optical Engineering, Tatung University, Taipei 104, Taiwan.
Sun
Ching-Cherng
CC
Chen
Yu-Cheng
YC
Ouyang
Yueh
Y