采用连续波半导体激光器为发射光源, 以电荷耦合器件(CCD)与鱼眼镜头为探测器, 设计了一套测量大气分子与气溶胶散射光成像的极化浊度计装置。该装置可实时观测大气样品的散射图像, 散射角观测范围为14°~162°, 极化角观测范围为0°~360°。利用该装置分别对氮气与水汽进行实时观测, 得到其散射图像, 其中氮气的散射光与瑞利散射理论相吻合, 不同极化角的散射光强与理论值的拟合优度为98%, 而水汽散射光随散射角的变化趋势与米氏散射理论的一致性较好。结果表明本装置在定量观测气溶胶散射光方面有潜在的应用价值。

Using a continue-wave semiconductor laser as transmitter and a charge-coupled device (CCD) with a fish-eye lens as detector, a set of polar nephelometer is designed for measuring angular distribution of light scattered by atmospheric molecular and aerosols. The device can observe the scattering image of the atmospheric sample in real time, the scattering angle observation range is 14°-162°, and the polarization angle observation range is 0°-360°. We use this device to observe pure nitrogen and water vapor in real time seperately, then obtain their scattering images. The nitrogen scattering light shows good correlation with Rayleigh scattering theory and the linear fitting R-square of sacattering intensity varied by polarization angle with calculation is 98%. The variation trend of water vapor scattering light with scattering angle is in good agreement with Mie scattering theory. The results show that the device has potential application value in quantitative observation of aerosol scattering light.