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Published on: September 25, 2020
Optical Encryption Based on Computer Generated Holograms in Photopolymer
Taihui Wu1,2, Jianshe Ma2, Chengchen Wang1,2
1Department of Precision Instrument, Tsinghua University, Beijing 100084, China.
Abstract:
An optical encryption method based on computer generated holograms printing of photopolymer is presented. Fraunhofer diffraction is performed based on the Gerchberg-Saxton algorithm, and a hologram of the Advanced Encryption Standard encrypted Quick Response code is generated to record the ciphertext. The holograms of the key and the three-dimensional image are generated by the angular spectrum diffraction algorithm. The experimental results show that large-size encrypted Quick Response (QR) code and miniature keys can be printed in photopolymers, which has good application prospects in optical encryption. This method has the advantages of high-density storage, high speed, large fault tolerance, and anti-peeping.

