采用双光路检测配置条件,结合 Mie 氏理论,运用斯托克斯矢量形式,以烟雾模拟特定气溶胶环境,探究偏振光经过不同烟雾环境的传输变化情况。考虑到大气气溶胶成分、质量浓度和颗粒大小以及光源的波长和偏振态等多因素的影响,主要在气溶胶质量浓度和光源配置方面进行研究。实验结果表明,不同烟雾质量浓度时,水平线偏振光的偏振特性基本不改变,右旋偏振光和45°线偏振光退偏程度随烟雾质量浓度的增加而增加,460 nm和556 nm波长的偏振光在变化趋势上保持一致。

This paper used smoke to simulate specific aerosol environment. Based on Mie′s theory and Stokes vector, two-ray-path detector explored the change of the polarization state when the different polarized light passed the smoke. There were many factors including the atmospheric aerosol composition, concentration, particle size and the wavelength and polarization state of light source. Mainly the aerosol concentration and light source configuration were studied and measured. The results show that the different mass concentration of the smoke cannot change the horizontal linear polarization state. Degree of polarization of 45° linear polarized light and circular polarized light decreases with the increase of mass concentration of smoke. The change trend of degree of polarization on 460 nm wavelength is similar with that on 556 nm.