The system used an iterative Fourier transform algorithm to optimize the encrypted hologram as well as the decryption key as phase-only elements.

• 该系统采用迭代傅立叶算法对全息图加密进行优化,使用纯相位元件作为解密密解,通过在简单的光学装置中叠加加密全息图和解密密钥实现光学解密。