油雾浓度对激光偏振度的影响
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摘要
基于斯托克斯矢量,通过测量偏振度,研究不同入射偏振态的激光分别在不同浓度油雾介质中传输后偏振特性的变化情况.实验采用波长为671nm和532nm的水平、45°、-45°、90°的线偏振光,使它们分别入射到5种不同浓度的油雾介质中,计算四种偏振态偏振光的偏振度变化情况.结果表明,在相同油雾浓度下,对于不同波长的激光,波长越长,线偏振度越高,然而每种波长随浓度的变化趋势是一样的;在相同波长情况下,随着浓度的改变,水平与垂直线偏振光的偏振度变化较大,可达50%,135°与45°线偏振光的偏振度变化较小,约为20%.
Based on the Stokes,the changes of the polarized light transmission characteristics were studied after the lasers of different incident polarizations transmit through the different concentrations of oil mist by measuring the degree of polarization respectively.Experiments were used the horizontal,45°,90°,-45°linear polarized lights with the wavelength of 671 nm and 532 nm to make them incident on the five kinds of different concentrations of oil mist media respectively,and computed the degree of polarization of four polarized polarization state.The results show that,at the same mist concentration and the lasers with different wavelengths,the longer wavelength,the higher the degree of polarization.But the trend of each wavelength polarization curve with the concentration is the same.Under the condition of the same wavelength and with the changing of the mist concentration,the variation of the polarization degree of the horizontal and vertical linear polarized lights is bigger which is up to 50%,the variation of the polarization degree of the 135°and 45°linear polarized lights is lesser which is about 20%.
Based on the Stokes,the changes of the polarized light transmission characteristics were studied after the lasers of different incident polarizations transmit through the different concentrations of oil mist by measuring the degree of polarization respectively.Experiments were used the horizontal,45°,90°,-45°linear polarized lights with the wavelength of 671 nm and 532 nm to make them incident on the five kinds of different concentrations of oil mist media respectively,and computed the degree of polarization of four polarized polarization state.The results show that,at the same mist concentration and the lasers with different wavelengths,the longer wavelength,the higher the degree of polarization.But the trend of each wavelength polarization curve with the concentration is the same.Under the condition of the same wavelength and with the changing of the mist concentration,the variation of the polarization degree of the horizontal and vertical linear polarized lights is bigger which is up to 50%,the variation of the polarization degree of the 135°and 45°linear polarized lights is lesser which is about 20%.
引文
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[4] CHENAULT D B,PEZZANITI J L.Polarization imaging through scattering media[C].SPIE,2000,4133(2000):124-133.
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[9] HAO Zeng-zhou,GONG Fang,PAN De-lu,et al.Scattering and polarization characteristics of dust aerosol paricles[J].Acta Optica Sinica,2012,32(1):01010021.郝增周,龚芳,潘德炉,等.沙尘气溶胶粒子群的散射和偏振特性[J]光学学报,2012,32(1):01010021.
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[13] WANG Fei,TANG Jun,REN Jian-bin,et al.Optimized calculation of solar spatial position with the rayleigh atmosphere polarization pattern[J].Acta Photonica Sinica,2014,43(12):12010021.王飞,唐军,任建斌,等.基于Rayleigh大气偏振模式的太阳空间位置优化计算[J].光子学报,2014,43(12):12010021.
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