Baldwin K C, Ehrlich M J, Wagner J W
Appl Opt. 1996 Jan 10;35(2):227-31. doi: 10.1364/AO.35.000227.
High-pass filtering effects have long been noted during recording of Fourier-type holograms on a saturable medium [Collier et al., Optical Holography (Academic, New York, 1971), p. 405]. The origin of the filtering effect lies in recording an absorption hologram such that the diffraction efficiency of strong spatial frequencies is significantly reduced by the saturable nature of the film. A simple optical configuration is used to take advantage of this effect in order to reduce the depth-of-focus noise associated with particle holography. The origin of the noise is clutter produced by a field of out-of-focus particles in which the particle under scrutiny exists [Reynolds et al., The New Physical Optics Notebook: Tutorials in Fourier Optics(Society of Photo-Optical Instrumentation Engineers, Belling-ham, Washington, 1989), p. 2054. A theoretical basis for the filtering is presented. Experimental results are shown.
在可饱和介质上记录傅里叶型全息图时，高通滤波效应早已为人所知[科利尔等人，《光学全息术》（学术出版社，纽约，1971年），第405页]。滤波效应的起源在于记录吸收全息图，使得强空间频率的衍射效率因胶片的可饱和特性而显著降低。使用一种简单的光学配置来利用这种效应，以减少与粒子全息术相关的焦深噪声。噪声的起源是由包含被研究粒子的散焦粒子场产生的杂波[雷诺兹等人，《新物理光学笔记本：傅里叶光学教程》（美国光学会，华盛顿州贝灵汉，1989年），第2054页]。给出了滤波的理论基础，并展示了实验结果。
