可编程菲涅耳相位透镜应用于多平面全息投影  

Multi-plane Holographic Projection Using Programmable Fresnel Phase Lenses

作　　者：沈川[1] 刘凯峰[1] 张成[1] 程鸿[1] 韦穗[1] 

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,合肥230039

出　　处：《光子学报》2014年第5期88-95,共8页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.61377006;61301296;61201396);NSFC-广东联合基金(No.U1201255);博士学科点专项科研基金(No.20113401130001)资助

摘　　要：研究了基于菲涅耳相位透镜实现多平面全息投影的方法,采用硅基液晶相位调制器建立了多平面全息投影系统.首先,利用可编程菲涅耳相位透镜代替傅里叶透镜,将计算机生成的相位全息图与菲涅耳透镜的相位结合;其次,基于时分复用和空分复用原理提出了加载菲涅耳相位透镜与相位全息图到相位空间光调制器上的两种方法;最后,讨论了在多平面全息投影中每个单一平面实现旋转物体动态360°视角显示的方法.实验结果表明:在距离硅基液晶分别为500、800、1 100和1 400mm处的四个重构平面可以获得全息投影图像;通过动态地改变菲涅耳相位透镜的焦距,可以实现多平面全息投影.A method to achieve multi-plane holographic projection using programmable Fresnel phase lenses was investigated. A multi-plane holographic projection system was developed with liquid crystal on silicon phase modulator. First, the programmable Fresnel phase lenses were substituted for the Fourier lens, in addition, the phase of Fresnel phase lenses were added to the computer generated phase holograms. Then based on the principles of time division multiplexing and space division multiplexing, two different methods combined programmable Fresnel phase lenses and phase holograms displayed on a phase modulating spatial light modulator were presented. Finally, the method to acquire dynamic 360~ viewing-angle images corresponding to the object rotation in each image plane of multi plane holographic projection was discussed. Experimental results show that holographic projection images could be recorded at different distances such as 500, 800, 1 100 and 1 400 mm from the LCOS. Dynamically change the focal length offered by the programmable Fresnel phase lenses, multi-plane holographic projection could be performed.

关 键 词：信息光学 全息显示 傅里叶变换 菲涅耳相位透镜 空间光调制器 相位全息图 硅基液晶 

分 类 号：O438.1[机械工程—光学工程]