基于米散射激光雷达的大气气溶胶检测系统设计

Design of an atmospheric aerosol detection system based on a Mie scattering lidar

设计了一种基于米散射激光雷达的大气气溶胶检测系统。依据米散射激光雷达的原理,研究了激光光束与大气气溶胶的相互作用,设计并搭建了米散射激光雷达大气气溶胶检测实验平台,利用Zemax设计了一套具有滤波聚焦功能的光学望远系统。通过对光束进行扩束并利用可调谐式固定装置来增强回波信号强度。实验结果表明,设计的系统具有高的回波信号强度和低的杂散光干扰,能获得超高信噪比的激光回波信号。由此大大降低了后续算法的难度,使测得的气溶胶数据更加准确。

An atmospheric aerosol detection system based on Mie scattering lidar is designed.According to the principle of meter scattering lidar,the interaction between laser beam and atmospheric aerosol is studied,and the Mie scattering lidar atmospheric aerosol detection experimental platform is designed and built.A set of optical telescope system with filter focusing function is designed using Zemax.The intensity of the echo signal is enhanced by expanding the beam.The experimental results show that the system designed in this paper has higher echo signal strength,lower stray light interference,and can obtain laser echo signals with ultra-high signal-tonoise ratio,which greatly reduces the difficulty of subsequent algorithms and makes the measured aerosol data more accurate.