强激光与粒子束2011，Vol.23Issue(3)：702-706,5.DOI:10.3788/HPLPB20112303.0702
带旋转毛玻璃干涉成像系统的统计分析
Statistical analysis of interferometric imaging system with rotating diffuser
摘要
Abstract
The theoretical model of signal-to-noise ratio(SNR) in the interferometric imaging system with rotating diffuser is proposed by means of statistical optics.According to the theoretical model, the relations between parameters of rotating diffuser,coherent time and SNR of the imaging system are analyzed numerically and demonstrated experimentally.It is shown that the rotating diffuser reduces coherent time, increases the number of unrelated speckle noises in gathering time, and thus reduces the speckle noise.An increasing in roughness or rotating frequency of diffuser or a decreasing in coherent length leads to a decreasing in coherent time.To obtain high SNR, the rotating diffuser should be well controlled so that the rotating period is approximately equal to the exposure time of CCD, and the coherent length of optical field is about 2～5 times as long as the optical path difference (OPD) between reference and test beams.关键词
信噪比/旋转毛玻璃/相干时间/散斑噪声/干涉成像系统Key words
signal to noise ratio/ rotating diffuser/ coherent time/ speckle noise/ interferometric imaging system分类
数理科学引用本文复制引用
徐建程,刘志超,杜雅薇,柴立群,许乔,王辉..带旋转毛玻璃干涉成像系统的统计分析[J].强激光与粒子束,2011,23(3):702-706,5.基金项目
浙江师范大学博士科研启动基金项目(ZC304010012) （ZC304010012）
