计算机辅助合成全息图

Synthetic Holograms by Computer Assistance

研究合成全息图的原理和记录方法.针对2D/3D合成全息图,分别讨论了对体视、动态、颜色和深度信息的编码以及全息观察窗的空间面积分割,计算了相关的记录参数.实验中采用计算机直接控制的液晶空间光调制器实现2D视差图像的自动显示与切换,方法简便易行,且消除了传统方法中底片复位所产生的误差,易实现自动化生产.实际制作了一个带有动感的合成彩虹全息图,验证了设计的正确性和方法的可行性.

The principle and recording process of synthetic holograms are studied. Novel encoding methods on stereo, motional sense, color and depth, as well as 2D area division to holographic viewing windows are discussed individually for the 2D/3D synthetic holograms. The recording parameters involved are calculated. It is found convenient and compact in displaying the 2D parallax pictures in LCSLMs (liquid crystal spatial light modulators) through computer control. It can eliminate the errors during the replacement and restoration of object plates in the traditional method. A rainbow hologram with motional sense has been recorded using LCSLM. The feasibility of this method is proved.