用空间光调制器实现全息再现像的实时重构  

Real-time Reconstruction of Holograms Using Spatial Light Modulator

作　　者：陈海云[1] 王辉[1] 

机构地区：[1]浙江师范大学信息光学研究所,浙江金华321004

出　　处：《光电工程》2008年第3期122-125,共4页Opto-Electronic Engineering

基　　金：国家自然科学基金资助项目(60477039)

摘　　要：针对目前实现大视角数字全息图实时动态再现的难点,提出了一种基于液晶空间光调制器用分时再现原理实现大视角数字全息图实时动态显示的新方法。分析了大视角全息图的计算原理和利用空间光调制器进行分时再现的技术原理,并提出了空间多屏拼接的方法。利用经改造的液晶背投影光学引擎系统设计了实验系统,对计算得到的全息图阵列进行了相应的处理以符合原投影系统RGB信号的传输,处理后的全息图阵列由计算机控制以60Hz的频率输出到光学引擎。实验结果表明,可以观察到大视角全息图的动态再现像。Aiming at current difficulty of the real-time and dynamic reconstruction of digital holograms with large viewing angle, a novel method was proposed according to the principle of time-sharing reconstruction based on the Liquid Crystal Spatial Light Modulator. The computing principle of large-viewing-angle holograms and technologic principle of time-sharing reconstruction utilizing spatial light modulator were analyzed, and a method of multi-screen jointing in space was proposed. Furthermore, we developed the experimental system by reshaping the optic engine of rear-projector. The computed holograms were processed to be with RGB format so as to accord with the transmission of RGB signals in the driving circuit. The processed holograms were output to the optic engine sequentially with a frequency of 60Hz. The dynamicly reconstructed image with large viewing angle could be obtained.

关 键 词：计算全息 视角 空间光调制器 光电再现 光学引擎 

分 类 号：TN911.73[电子电信—通信与信息系统] O438[电子电信—信息与通信工程]