| 多激光波长在不同稀薄随机分布冰晶粒子层的散射特性 |
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| 引用本文： | 王明军,于记华,刘雁翔,高香香,张华永. 多激光波长在不同稀薄随机分布冰晶粒子层的散射特性[J]. 红外与激光工程, 2019, 48(3): 311002-0311002(6). DOI: 10.3788/IRLA201948.0311002 |
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| 作者姓名： | 王明军 于记华 刘雁翔 高香香 张华永 |
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| 作者单位： | 1.西安理工大学 自动化与信息工程学院,陕西 西安 710048; |
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| 基金项目： | 国家自然科学基金（61771385，61377080，60977054）;陕西省重点产业创新项目（2017ZDCXL-GY-06-01） |
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| 摘 要： | 依据稀薄随机分布冰晶粒子的激光散射特性，当球形冰晶粒子分别服从指数、对数正态、Gamma三种不同分布时，数值计算并分析了0.65、1.31、1.55 m激光入射下不同稀薄随机冰晶粒子层的微分散射截面随散射角的变化关系。结果表明:入射激光波长的改变对冰晶粒子层的微分散射截面有一定的影响；当冰晶粒子服从指数分布时稀薄随机分布冰晶粒子层的微分散射截面最大，要比其他两个分布大几个数量级；不同激光波长和冰粒子的尺度分布对稀薄随机分布冰晶粒子层的激光散射特性有较大影响。文中所做的工作为进一步开展地空链路中冰晶粒子云层对激光传输特性的影响研究奠定基础。
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| 关 键 词： | 光散射特性 冰晶粒子 尺度分布 微分散射截面 |
| 收稿时间： | 2018-11-10 |
Scattering properties of different rarefied random distributed ice crystal particles with different laser wavelengths |
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| Affiliation: | 1.School of Automation and Information Engineering,Xi'an University of Technology,Xi'an 710048,China;2.CRRC Tangshan Co.,Ltd.,Tangshan 064000,China;3.North China Vehicle Research Institute,Beijing 100072,China;4.School of Electronics and Information Engineering,Anhui University,Hefei 230039,China |
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| Abstract: | According to laser statistical scattering properties of ice crystal particles with rarefied random distribution, differential scattering section(DSS) of ice spheres with exponential distribution, lognormal distribution, Gamma distribution changed with scattering angles were calculated numerically and analyzed at 0.65, 1.31 and 1.55 m, respectively. The results show the change of incident laser wavelength has a certain effect on DSS of ice-crystal layer. And DSS of ice spheres with exponential distribution is the largest, which is several orders of magnitude larger than the other two distributions. So different laser wavelength and size distribution models of ice particles have great influence on laser scattering properties of rarefied random distributed ice crystal particles. The works in this paper are based on the foundation for further study development of the effect of ice-crystals cloud on the laser propagation properties in the ground-air links. |
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