基于全光调控矢量光场的光学图像加密技术基础研究

Based on the theoretical and experimental results of traditional optical image encryption and vector optical fields, the mathematical characterization and generation of full Poincaré vector optical fields with independent controlled complex amplitude as the point of departure, beginning with the application of Poincaré polarization in image encryption as optical key, the effective combination of full vector optical fields and image encryption as the basic goal,this project will develop the basic research on image encryption in a full Poincaré vector optical fields with controlled amplitude and phase. The research contents include those: (1) Research on the mathematical characterization of arbitrary polarization vector fields when the polarization parameters such as axial ratio, orientation and rotation are completely controlled at every point in the optical field, and then develop the theoretical model of Poincaré polarization. (2) Study the generation methods of full Poincaré vector optical fields with amplitude and phase controlled based on interferometry, obtain the full vector optical fields with high purity and high conversion efficiency. (3)Optical implement for image encryption/decryption in full Poincaré vector optical fields with amplitude and phase controlled, probe into the image encryption way in full Poincaré vector optical fields and the mechanisms of Poincaré polarization as optical key. (4) The security of full vector optical field image encryption technology is studied, and the internal relations of amplitude, phase and polarization key in full vector optical field image encryption are analyzed. This project is of great value not only for the further development of optical regulation and image encryption, but also for the application of data, information and network security.

本项目以传统光学图像加密技术和矢量光场的理论及实验研究结果为基础，以全光调控矢量光场的数学表征和产生为出发点，以全邦加球偏振态作为光学密钥应用于图像加密为切入点，以全光调控矢量光场和图像加密技术的有效融合为基本目标，开展基于全光调控矢量光场的图像加密技术基础研究。研究内容包括：（1）研究光场中任意点的椭偏率、取向、旋向等偏振参量完全可控时任意偏振矢量光场的数学表征模型；（2）探究基于干涉法和单路集成法的振幅和相位可控的全邦加球矢量光生成方法，实验上获得高纯度、高转化效率的全矢量光场；（3）理论及光学实现全光调控矢量光场图像加密和解密，探究全邦加球偏振态作为光学密钥的作用机理；（4）研究全矢量光场图像加密技术的安全性，分析全矢量光场图像加密中振幅、相位和偏振密钥的内在联系。本项目不仅对光场调控和光学图像加密的新发展具有重要价值，而且在数据安全、信息安全和网络安全等应用领域有重要的意义。

本项目将全光调控系统与光学图像加密技术结合，研究了基于任意矢量光场的光学图像加密技术。改进了任意矢量偏振光场的全Poincare球理论模型，研究了多束矢量光的干涉场分布及其在制备表面微纳周期结构中的应用；设计并搭建了全光调控矢量光场的实验系统，获得了相位和偏振独立调控的高纯度、高质量矢量光场；将全光调控矢量光场用于光学图像加密，提出了一种基于全矢量光场调控和傅里叶变换频移的多图像非对称偏振光学加密方法，分析了基于全矢量光调控系统的多图像加密系统的鲁棒性和抵抗暴力攻击的能力。此外，通过改进光场调控系统设计了一种基于数字全息和计算全息的图像加密和解密的光学实现方法，搭建了数字全息加密和计算全息解密的光学实验系统；设计了基于空间角度复用和计算全息的多图像光学加密系统，光学实现了多幅不同类型和尺寸图像的加密和解密；最后将深度学习算法引入光学图像加密技术中，解决了光学图像加密系统中解密图像存在噪声的问题。综合上述结果，本研究为探讨矢量光场在光学信息安全领域的应用奠定了坚实的工作基础，同时推动了光场调控技术和光学图像加密技术的应用和发展。