计算全息显示技术的研究

Research on computer generated holograms

基于电寻址液晶光阀实验系统,利用计算像面全息法制作全息图并实现像的再现.综合比较物点散射法、层析法和主菲涅耳波带法3种计算全息方法的优劣,选择物点散射法以四级迂回相位编码的方式,得到三维物体的计算全息图.通过烟雾散射的丁达尔效应观察圆柱体的全息像,采用空心立方体优化成像的清晰度和对比度.

Based on electrically addressed liquid crystal light valve,computer generated holograms were made,two dimensional and three dimensional images were reconstructed respectively.Comparing different methods of computer generated holograms,such as point scattering method,chromatographic method and master Fresnel wave band method,the point scattering method combined with four detour phases encoding scheme was chosen to make holograms of three dimensional objects.The holographic image of the cylinder was observed through the Tyndall effect of smog scattering,and the sharpness and contrast of the hollow cube were used to optimize the imaging.