Optoelectronic information encryption with phase-shifting interferometry.
Optoelectronic information encryption with phase-shifting interferometry.
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DOI：
10.1364/ao.39.002313
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发表时间：
2000-05
期刊：
影响因子：
1.9
通讯作者：
E. Tajahuerce;O. Matoba;S. Verrall;B. Javidi
中科院分区：
文献类型：
--
作者：
E. Tajahuerce;O. Matoba;S. Verrall;B. Javidi
介绍了一种将光学加密的高速度和高安全性与电子传输、存储和解密的优点相结合的技术。数字相移干涉术用于利用强度记录装置有效地记录相位和幅度信息。通过使用两个随机相位码来执行加密，一个在物面中，另一个在菲涅耳域中，在加密的图像中提供高安全性和具有多个自由度的密钥。我们描述了我们的技术如何适用于加密输入的夫琅和费或菲涅耳衍射图。电子解密可以通过一步快速傅里叶变换重建过程来执行。给出了包括无透镜设置在内的两个系统的实验结果。
A technique that combines the high speed and the high security of optical encryption with the advantages of electronic transmission, storage, and decryption is introduced. Digital phase-shifting interferometry is used for efficient recording of phase and amplitude information with an intensity recording device. The encryption is performed by use of two random phase codes, one in the object plane and another in the Fresnel domain, providing high security in the encrypted image and a key with many degrees of freedom. We describe how our technique can be adapted to encrypt either the Fraunhofer or the Fresnel diffraction pattern of the input. Electronic decryption can be performed with a one-step fast Fourier transform reconstruction procedure. Experimental results for both systems including a lensless setup are shown.