基于空间光调制器的合成全息显示技术研究

Study on Display Technology of Synthetic Hologram Based on Spatial Light Modulator

提出了一种基于液晶空间光调制器和计算全息技术的合成全息显示新方法。由计算机设计三维物体模型并获取带有视差信息的系列二维体视数字图像,通过计算全息方法对每一幅二维图像计算得到相应的全息图,再现时将左右眼视图对应的全息图同时输出到两个空间光调制器进行实时光电再现,并使再现像的位置符合人眼双目观察需要,计算机控制不同视角全息图顺序输出,从而实现合成全息立体显示,同时可观察合成全息动感,而观察者位置不必移动,与传统的合成全息显示相比操作灵活,易于控制。在实验中用液晶背投影光学引擎系统设计了硬件实验系统,设计了相关的控制软件,并给出了实验结果。

Based on liquid crystal spatial light modulator and technology of computer-generated hologram,a new method of synthetic hologram display is proposed.3D object model is generated by computer and a serial of 2D digital stereo images with parallactic information are obtained and then the correlated holograms of every 2D image are computed.The two holograms correlated with the left and right stereo image are output simultaneously to two SLMs respectively for reconstruction and the position of reconstructed images are arranged to meet the requirement of two-eye perceiving.The computer controls the holograms with different viewing angle to be transferred sequentially to implement stereoscopic display of synthetic hologram,and at the same time,the perceived stereoscopic image is sensorimotor without moving the position of viewer.In this approach,the operation is more flexible and easer to control than that in conventional synthetic holography.The experimental system is designed using liquid crystal optic engine system of rear-projector.The controlling program is also designed and the experimental result is presented.