基于混合相位的多平面全息显示  

Multi-plane holographic display algorithm based on hybrid phase

作　　者：丁宇鑫 沈川 王安临 潘俊俏 章权兵[1] 张成[1] 韦穗[1] DING Yuxin;SHEN Chuan;WANG Anlin;PAN Junqiao;ZHANG Quanbing;ZHANG Cheng;WEI Sui(Key Laboratory of Intelligent Computing&Signal Processing,Ministry of Education,Anhui University,Hefei 230601,China)

机构地区：[1]安徽大学计算智能与信号处理教育部重点实验室,安徽合肥230061

出　　处：《液晶与显示》2024年第7期909-918,共10页Chinese Journal of Liquid Crystals and Displays

基　　金：国家自然科学基金(No.62271005);安徽省高校自然科学基金(No.2022AH050089,No.KJ2020ZD02)。

摘　　要：在计算全息术中,基于层析法实现多平面全息显示是最常用的方法之一。针对层析法中多个平面之间存在串扰的问题,本文结合随机相位和二次相位的优点,提出了一种基于混合相位的多平面全息显示方法。首先,选择合适的权重因子生成混合相位代替随机相位作为初始相位。利用迭代傅里叶变换算法进行迭代后,将获得的每个子全息图与具有不同重建距离的菲涅尔波带片叠加,接着将每个全息图以复振幅叠加,获取相位后得到纯相位全息图,从而将分层图像重构于指定的平面上。利用硅基液晶空间光调制器搭建多平面全息显示系统开展了相关的光学实验。实验结果表明,与基于随机相位的方法相比,本文方法提高了结构相似性参数(最高可达4.6%),减弱了多个全息重构平面之间的串扰,提高了多平面全息显示的再现质量。In computational holography,the realization of multi-plane holographic display based on layer-based method is one of the most commonly used methods.Aiming at the problem of crosstalk between multiple planes in layer-based method,this paper combines the advantages of random phase and quadratic phase,and proposes a multiplanar holographic display method based on hybrid phase.First,a suitable weighting factor is selected to generate the hybrid phase instead of the random phase as the initial phase.After iteration using the iterative Fourier transform algorithm,each obtained sub-hologram is superimposed with Fresnel zone plate with different reconstruction distances.Then,each hologram is superimposed with complex amplitude,and a phase-only hologram is obtained after the phase is obtained,thus the layered image is reconstructed on the specified plane.A multi-plane holographic display system is constructed using a liquid crystal on silicon to carry out relevant optical experiments.The experimental results show that the structural similarity parameter of this method is improved(up to 4.6%)compared with the random phase-based method,which attenuates the crosstalk between multiple holographic reconstruction planes and improves the reproduction quality of the multiplane holographic display.

关 键 词：多平面显示 层析法 混合相位 纯相位全息图 菲涅尔波带片 

分 类 号：TN26[电子电信—物理电子学]