Simulation method for non-Gaussian speckle in a partially coherent system
Simulation method for non-Gaussian speckle in a partially coherent system
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DOI：
10.1364/josaa.26.001954
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发表时间：
2009-09-01
影响因子：
1.9
通讯作者：
Milster, Tom D.
中科院分区：
文献类型：
--
作者：
Kang, Dongyel;Milster, Tom D.
模拟了部分空间相干系统中相位扰动随机物场的非高斯散斑衬度。准单色扩展非相干源被建模为分布在规则网格上的独立点源的集合。光源照亮科勒配置中的相位屏物体。散斑是由点光源产生的像平面内的辐照度的非相干总和计算的。模拟散斑对比度进行了验证的实验与分形粗糙表面分布，使用灰度无掩模光刻工具制造。讨论了模拟方法的特点和影响散斑对比度的物理量。(C)2009年美国光学学会
Non-Gaussian speckle contrast from a phase-perturbed random object field in a spatially partially coherent system is simulated. A quasi-monochromatic extended incoherent source is modeled as a collection of independent point sources distributed on a regular grid. The source illuminates a phase screen object in a Kohler configuration. Speckle is calculated from the incoherent sum of irradiances in the image plane generated from the point sources. Simulated speckle contrasts are verified by an experiment with a fractallike rough surface distribution that is fabricated using a grayscale maskless lithography tool. Characteristics of the simulation method and physical quantities affecting speckle contrast are discussed. (C) 2009 Optical Society of America