摘要
大气散射光偏振特性的研究对于降低自然扰动对偏振光导航系统的误差影响,优化系统具有重要意义。实验采用矢量偏振分析装置测量了不同天气情况下大气散射光偏振度和太阳光单次散射角,研究了两者之间的关系。结果表明,在不同天气条件下,大气散射光偏振度和太阳光单次散射角之间皆为抛物线型关系,散射光偏振度变化主要由大气散射粒子大小变化引起。当散射粒子半径增大时,散射光偏振度减小,并且偏振度最大值所对应的散射角值发生偏移。基于米氏散射理论建立了单次光散射偏振模型对该实验进行了理论分析,数值仿真结果与实验结果一致。
Research on the polarization patterns is of great importance to reduce polarization disturbance errors,improve measurement accuracy and optimize system design.Scattering angle（SA） and degree of polarization（DOP） of skylight are measured by vector polarization measurement system under different sky conditions.The experiments demonstrate that all relationship curves between SA and DOP can be described as parabolas regardless of sky conditions.DOP changes with sizes of atmospheric scattering particles.When the sizes of the particles increase,DOP decreases and SA drifts.A single light scattering polarization model based on Mie theory is proposed to analyze the experiments.Simulation results are in good agreement with the experimental results.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2010年第12期3002-3006,共5页
Chinese Journal of Lasers
基金
国家自然科学基金(60938003)
上海市启明星项目(08QB14005)
上海市科委国际合作研究项目(08520704200)资助课题
关键词
大气光学
大气散射
偏振
散射角
偏振度
atmospheric optics
atmospheric scattering
polarization
scattering angle
degree of polarization
