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后向散射激光雷达技术已广泛应用于大气气溶胶的探测,但由于有盲区和过渡区,限制了它在近距离段的探测范围和精度。侧向散射激光雷达技术没有后向散射激光雷达技术中的上述缺陷,可实现近距离段气溶胶信号的连续探测,且探测精度较高。开发研制了基于CCD的侧向散射激光雷达系统,它由激光发射、光学接收、几何定标及数据采集等子系统组成。与后向散射激光雷达的对比探测个例表明,该激光雷达系统数据可靠,近距离的有效探测范围为0.02~4 km。这一系统的建立为进一步深入研究近地面层的气溶胶时、空分布奠定了坚实的基础。
Backscattering lidar has been widely used in the detection of atmospheric aerosols, but due to the blind zone and the transition zone, it limits its detection range and accuracy in the short range. The technology of backscatter lidar without the above mentioned drawbacks in backscattering lidar can realize the continuous detection of aerosol signals in the near range and the detection accuracy is high. Developed a CCD-based lateral scattering lidar system, which consists of laser emission, optical receiver, geometric calibration and data acquisition and other subsystems. Compared with the backscattering lidar, a case study shows that the lidar system has a reliable and close range of effective detection range of 0.02 ~ 4 km. The establishment of this system has laid a solid foundation for the further study of near-surface aerosol.