湍流大气折返路径成像光斑与光强起伏实验研究

大气与环境光学学报 ›› 2018, Vol. 13 ›› Issue (4): 241-249.

• 大气光学 • 下一篇

湍流大气折返路径成像光斑与光强起伏实验研究

王钰茹1,2，梅海平1*

(1中国科学院安徽光学精密机械研究所中国科学院大气光学重点实验室，安徽合肥 230031;
2中国科学技术大学，安徽合肥 230026)

收稿日期:2017-10-17 出版日期:2018-07-28 发布日期:2018-07-10
通讯作者: 梅海平（1980-），男，博士，副研究员，主要从事大气激光传输与湍流特性的研究. E-mail:hpmei@aiofm.ac.cn
作者简介:王钰茹（1993-），女，江西吉安人，研究生，主要从事大气激光传输方面的研究。

Experimental Investigation on Retro-Reflective Laser Intensity Distribution and Fluctuations in Turbulent Atmosphere

WANG Yuru1,2, MEI Haiping1*

( 1 Key Laboratory of Atmospheric Optics, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China;
2 University of Science and Technology of China, Hefei 230026, China)

Received:2017-10-17 Published:2018-07-28 Online:2018-07-10

摘要/Abstract

摘要：

利用红光激光器、3M微晶棱镜阵列反光膜和长焦高速CCD相机构建的折返路径激光成像探测系统，进行了湍流大气中1 km传输路径上的激光光斑回波成像探测实验，同时使用激光闪烁仪实时监测湍流强度变化。首先对获得的激光回波光斑图像的强度分布进行了直观分析，比较了在不同湍流强度下折返路径激光光斑形态的差异，接着统计计算了不同湍流强度下，光斑光强概率密度分布与光斑图像位置和区域面积大小的关系。结果表明：折返路径下的激光传输光强起伏概率密度函数在光斑上的各处基本都符合对数正态分布，但在质心处附近的区域符合程度更高，且符合程度与接收面积大小呈负相关。同时湍流强度对回波光斑平面上不同位置之间、不同接收区域大小之间符合正态分布程度的差异有一定影响。

关键词: 大气光学, 折返路径激光传输, 大气湍流效应, 微晶棱镜阵列, 光强分布, 概率密度分布

Abstract:

The laser spot echo imaging experiment was carried out on a 1 km transmission path in a turbulent atmosphere using a reentry path laser imaging detection system constructed by red laser, 3M microcrystalline prism array reflector and telephoto high speed CCD. At the same time, the scintillometer was used to monitor the changes of turbulence intensity. Firstly, the intensity distribution of the obtained laser spot image is analyzed intuitively. The difference of the laser spot pattern under different turbulence intensity is compared. Then, the probability distribution of the light intensity in the range of different turbulence intensity and different aperture is calculated statistically. The results show that the light intensity probability density function basically follows the lognormal distribution in the vicinity of the focal spot, but the area near the center of mass is in a higher degree, and its degree of compliance is negatively correlated with the size of the receiving area. At the same time, the turbulence intensity affects the difference of the normal distribution between the different positions of the spot echo plane and the different receiving area.

Key words: atmospheric optics, retro-reflective laser transmission, atmospheric turbulence effects, microcrystalline prism array, intensity distribution, probability density distribution

中图分类号:

O436

王钰茹梅海平. 湍流大气折返路径成像光斑与光强起伏实验研究[J]. 大气与环境光学学报, 2018, 13(4): 241-249.

WANG Yu-Ru, MEI Hai-Ping. Experimental Investigation on Retro-Reflective Laser Intensity Distribution and Fluctuations in Turbulent Atmosphere[J]. Journal of Atmospheric and Environmental Optics, 2018, 13(4): 241-249.

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湍流大气折返路径成像光斑与光强起伏实验研究

Experimental Investigation on Retro-Reflective Laser Intensity Distribution and Fluctuations in Turbulent Atmosphere

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