光学学报, 2014, 34 (10): 1012002, 网络出版: 2014-09-09
晴朗天气下满月偏振模式的研究
Study on Polarization Pattern of Full Moonlight in Clear Sky
测量 大气光学 满月偏振模式 成像式全天空测试 散射光 measurement atmospheric optics moonlight polarization pattern full-sky imaging measurement scattered light
摘要
研究晴朗天气条件下满月天空偏振模式,分析并探索太阳光和月光天空偏振特性的分布规律。对夜间光源进行分析,以Rayleigh散射理论为基础对满月天空偏振模式进行了仿真。利用成像式全天空偏振光测试系统对太阳光、暮光和满月月光的天空偏振模式进行了测试,通过偏振模式中的特殊点中性点和子午线方向进行对比分析。结果表明:晴朗天气下满月偏振模式与仿真结果基本一致,符合Rayleigh散射理论;暮光偏振模式同时受到月光和太阳光的影响;当太阳高度角和月亮高度角相近时,太阳光和月光分布规律是相似的;光强大小并不改变天空光偏振模式的分布规律和偏振度的大小。
Abstract
The polarization pattern of full moonlight in clear sky is investrgated in order to understand the distribution law of polarization properties of full-sky scattered light better. Night skylight sources have been investigated. The polarization pattern of full moonlight has been simulated based on Rayleigh scattering theory. The distribution patterns of full moonlight, twilight and sunlight as well as the distribution patterns of continuous observation from twilight to moonlight have been acquired using a full-sky imaging measurement system. After contrasting and analyzing the neutral point and the orientation of meridian line, it is proved that the polarization pattern of full moonlight in clear sky is basically consistent with the simulation results, and it conforms to the Rayleigh scattering theory; the twilight polarization pattern is affected by sunlight and moonlight simultaneously; when the altitude angle of the sun is similar to that of the moon, the distribution trends of polarization patterns are identical; the power of the light does not change the value of skylight polarization distribution patterns.
崔岩, 陈小龙, 褚金奎, 陈辰, 李晨牧, 关乐. 晴朗天气下满月偏振模式的研究[J]. 光学学报, 2014, 34(10): 1012002. Cui Yan, Chen Xiaolong, Chu Jinkui, Chen Chen, Li Chenmu, Guan Le. Study on Polarization Pattern of Full Moonlight in Clear Sky[J]. Acta Optica Sinica, 2014, 34(10): 1012002.