van der Gracht J
Appl Opt. 1995 Jul 10;34(20):4065-72. doi: 10.1364/AO.34.004065.
A partially coherent image-enhancement system is introduced for notching unwanted spatial frequency components. The technique offers two advantages over a more conventional coherent spatial-filtering approach. First, the method utilizes a fixed pupil mask and a dynamic source and eliminates the need for a high-optical-quality spatial light modulator. Second, the redundancy that is introduced by the source provides greatly improved immunity to the effects of optical setup noise (dust, scratches, and other imperfections on optical surfaces). Numerical simulations and a laboratory experiment support the analysis.
本文介绍了一种用于抑制不需要的空间频率成分的部分相干图像增强系统。与更传统的相干空间滤波方法相比，该技术具有两个优点。首先，该方法使用固定的光瞳掩模和动态光源，无需使用光学质量高的空间光调制器。其次，光源引入的冗余大大提高了对光学装置噪声（灰尘、划痕和光学表面上的其他缺陷）影响的免疫力。数值模拟和实验室实验支持了这一分析。
