The longitudinal distortion , lateral displacement and luminance difference of the reconstructed images at different depth of field in multiple - exposure rainbow holography for 3 - d synthesis of multiple ct slides were analyzed , for which the effective compensation methods were presented , and the experimental results were given 分析了应用彩虹全息术实现ct图片的立体合成过程中再现像在轴向及垂轴方向上的畸变以及再现像亮度的失真,分别提出了相应的补偿方法，并给出了相应的实验结果
By combining the advanced computer technology and optical holography technology together , computer - generated hologram can generate holograms , which , with no demand for objects , can be reconstructed through optical ways after the computer has processed the mathematical description of object waves 计算全息是将先进的计算机技术和光全息术结合起来，利用计算机产生全息图。它不需要物体实际存在，而是把物波的数学描述输入计算机处理后，绘制出全息图，然后用光学方法重现。
The work of this thesis has four parts : in the first part , we will describe completely the developing history of optical holography and analyze its formation geometrically , moreover we also introduce the physical process of the recording and reconstruction of the hologram , and use the simple mathematical formulas to describe it 本论文所作的工作主要有四部分：第一部分详尽地叙述了光全息术的发展历史，介绍了全息图的记录与再现的物理过程并进行了几何分析，用简单的数学公式表示全息图的形成过程。
This is the first generation holograph . aided by an abundance ot the new coherent laser light and extended by a number of technological advances , leith and upatnieks produced the off - axis hologram recorded and reconstructed by laser in 1962 . the twin images can be separated in this hologram 随着高相干度激光的出现， 1962年leith和upatnieks将通讯理论中的载频概念推广到空域中提出激光记录、激光再现的离轴全息图，分离了孪生像，使全息术进入了第二代全息图的发展时期。
