荧光-米偏振激光雷达系统定标

Air quality has become one of the most concerned social hot issues at present. Lidar is widely used to research this problem due to its temporal and spatial resolution capabilities. A calibration method for the first domestic self-developed fluorescence-Mie polarization lidar system of 355 nm is proposed and the retrieve precision of aerosols is improved effectively. The method includes calibration of the Mie polarization channels and the calibration of fluorescence and Mie channel. Several sets of calibration experiments were designed by the half-wave plate method and beam-splitter method to obtain the corresponding correlation coefficients and eliminate deviations between channels. The calibration results show that the correlation coefficient of the Mie polarization channel is 1.01, the standard deviation is less than 0.13, the average correlation coefficient of fluorescence and Mie channel is 1.13, and the standard deviation is less than 0.04.