Demetrakopoulos T H, Mittra R
Appl Opt. 1974 Mar 1;13(3):665-70. doi: 10.1364/AO.13.000665.
Digital and optical reconstruction techniques are applied to synthetic holograms that are recorded at suboptical frequencies. The first section of the paper considers digital reconstruction that entails the application of the inverse diffraction transform to the diffraction pattern of an object illuminated with a suboptical source. Different cross sections of the object are displayed on a CRT in a sequential fashion. Image enhancement techniques are also employed in the process of digital reconstruction. The second section outlines a method for partially alleviating the longitudinal distortion that is inherent in optical reconstruction from synthetic holograms because of the difference between the recording and reconstructing wavelengths. The paper considers both the diffuse and nondiffuse illumination schemes and discusses the relative advantages and disadvantages of digital and optical reconstruction schemes.
数字和光学重建技术被应用于在亚光学频率下记录的合成全息图。本文的第一部分考虑数字重建，这需要将逆衍射变换应用于由亚光光源照明的物体的衍射图样。物体的不同横截面以顺序方式显示在阴极射线管上。图像增强技术也用于数字重建过程。第二部分概述了一种方法，用于部分缓解由于记录波长和重建波长之间的差异而在从合成全息图进行光学重建时固有的纵向失真。本文考虑了漫射和非漫射照明方案，并讨论了数字和光学重建方案的相对优缺点。
