Beijing Key Laboratory for Terahertz Spectroscopy and Imaging, Ministry of Education, and Department of Physics, Capital Normal University, Beijing 100048, China.
Opt Lett. 2013 Apr 15;38(8):1289-91. doi: 10.1364/OL.38.001289.
A simple optical image encryption system with spatially incoherent illumination is proposed. Only one Fourier lens and one random phase plate are contained in this system. The original image is perturbed by a random phase-only mask located on the aperture plane. The encrypted information is the only intensity distribution that can be directly recorded by a CCD or CMOS. The decryption procedure can be performed digitally and the random phase distribution works as the decryption key. Numerical simulations and experimental results demonstrate the validity of the proposed method.
提出了一种基于空间非相干照明的简单光学图像加密系统。该系统仅包含一个傅里叶透镜和一个随机相位板。原始图像通过位于孔径平面上的随机纯相位掩模进行干扰。加密信息是唯一可以直接由 CCD 或 CMOS 记录的强度分布。解密过程可以数字方式执行，随机相位分布用作解密密钥。数值模拟和实验结果验证了所提出方法的有效性。
