计算机与光学相结合的体视全息三维显示

摘要

Based on computer-generated holography and optical holography, a new three-dimensional stereoscopic display technique combining computer-generated hologram （CGH） and optical hologram is proposed. Firstly, a pair of stereogram with parallax is obtained using camera, and two computer-generated holograms（H1） is created from the stereogram. Then, re-illuminating H1, a pair of images with parallax is acquired, and the rainbow hologram（H2） is recorded when interfering with reference beam. FinaUy, a three- dimensional reconstruction is synthesized through H2 under natural light. This method utilizes the advantages of CGH and optical hologram, and Fast-Fourier-transform is introduced to speed up the calculation of CGH.%在计算机制全息技术和光学全息技术的基础上，研究用计算机一光学方法联合制作体视全息三维立体显示技术．根据人眼立体视觉原理获取三维物体带有视差信息的体视图，通过计算机计算得到计算全息图H1；将H1严格对位，用激光再现获得带有视差信息的再现像，并以此再现像为对象，用光学全息的方法拍摄彩虹全息图H2；用白光再现H2，通过双眼综合出三维立体图像．在全息图的计算过程中，采用快速傅里叶变换算法提高了计算速度，将计算全息与光学全息相结合，发挥了各自的优势．