动态主观散斑的时间相关性研究 -- 论文摘要-- 中国光学期刊网

动态主观散斑的时间相关性研究收藏该论文以便查看

Analysis of temporal coherence of dynamic subjective speckle

常宏

杨福贵

董磊

王安廷

谢建平

明海

摘要

根据散射屏移动时动态主观散斑时间相关公式，分析了成像系统主要参数对动态主观散斑时间相关性的影响:一般情况下屏表面参数对散斑的时间相关性影响较小; 激光光斑大于成像系统物面分辨斑时，散斑时间相关性由透镜孔径大小决定;激光光斑小于成像系统物面分辨斑的尺寸时，减小激光光斑尺寸能减弱散斑时间相关性。对以上结果进行了相关的理论模拟和部分实验验证，通过模拟发现，激光光斑小于成像系统物面分辨斑时，散斑时间相关长度和光斑尺寸大小成正比。结论对于激光投影系统中利用时间平均进行的散斑抑制具有指导意义。

Abstract

The formula of temporal coherence of dynamic subjective speckle was deduced, by which the influence of optical parameters from the imaging system on temporal coherence of speckle was analyzed. It is concluded that the influence of the parameters of screen on speckle temporal coherence can be neglected and the speckle temporal coherence is mainly affected by the diameter of the lens or the size of laser spot on screen. If the size of laser spot is lager than that of resolution spot on object plane, the diameter of lens gives the mainly affection, while on the other side the size of laser spot gives the dominating affection and the temporal coherence can be reduced by reducing the size of laser spot on screen. The result was confirmed by simulation and experiment, and it can give an instruction to speckle reduction in laser display.

中图分类号 TN248

所属栏目激光技术与器件

基金项目国家自然科学基金资助项目(10474093)

收稿日期 2009-7-10

修改稿日期 2009-9-10

作者单位查看

联系人作者常宏

作者简介常宏(1983-),硕士,主要从事激光显示和激光散斑方面的研究。

引用该论文 CHANG Hong,YANG Fu-gui,DONG Lei,WANG An-ting,XIE Jian-ping,MING Hai. Analysis of temporal coherence of dynamic subjective speckle[J]. Chinese Journal of Quantum Electronics, 2010, 27(3): 288～292 (in chinese)
常宏,杨福贵,董磊,王安廷,谢建平,明海. 动态主观散斑的时间相关性研究[J]. 量子电子学报, 2010, 27(3): 288～292

参考文献

【1】Goodman J W. Statistical properties of laser speckle patterns ［C］. in Laser Speckle and Related Phenomena [J]. Topics in Applied Physics, Berlin: Speinger-Verlagm, 19751-76: 1-76.

【2】Asakura T, Takia N. Dynamic laser speckles and their application to velocity measurements of the diffuser object [J]. Appl. Phys., 1981, 25(3): 179-194.

【3】Takeaki Yoshimura. Statistical properties of dynamic speckles [J]. J. Opt. Soc. Am., 1986, 3(7): 1032-1054.

【4】Zhou Lili, Zhao Xuezeng, Wang Weijie. Statistical properties analysis of dynamic speckles produced by a weak random phase screen under illumination of a Gaussian light ［C］. Proc. of SPIE, 2004, 5446: 784-791.

【5】Fung A K, Cheng M F. Numerical simulation of scattering from sample and composite random surfaces [J]. J. Opt. Soc. Am. A, 1985, 2(12): 2274-2284.

【6】Chen Hui, Hu Yuanzhong, Wang Hui, et al. Computer simulation of rough surfaces [J]. Lubrication Engineering (润滑与密封), 2006, 10: 52-59 (in Chinese).

【7】Kovarz M W, Bonilla F H, Kruschwitz B E, et al. Speckle reduction for display system with electromechanical grating ［P］. U.S.: 7046 446, 2006.

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