Journal
OPTICS EXPRESS
Volume 25, Issue 7, Pages 8212-8222Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.25.008212
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Funding
- National Natural Science Foundation of China (NSFC) [61275133]
- International Science and Technology Cooperation [2014DFE00200]
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Optical image encryption, especially double-random-phase-based, is of great interest in information security. In this work, we experimentally demonstrate the security and feasibility of optical image encryption with asymmetric double random phase and computer-generated hologram (CGH) by using spatial light modulator. First of all, the encrypted image modulated by asymmetric double random phase is numerically encoded into real-value CGH. Then, the encoded real-value CGH is loaded on the spatial light modulator and optically decrypted in self-designed experimental system. Experimental decryption results are in agreement with numerical calculations under the prober/mistaken phase keys condition. This optical decryption technology opens a window of optical encryption practical application and shows great potential for digital multimedia product copyright protection and holographic false trademark. (C) 2017 Optical Society of America
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