Mei Liang, Guan Peng
Opt Lett. 2017 Sep 15;42(18):3562-3565. doi: 10.1364/OL.42.003562.
A polarization Scheimpflug lidar system based on the Scheimpflug principle has been developed by employing two linearly polarized 808 nm laser diodes and a complementary metal-oxide-semiconductor (CMOS) image sensor. The polarization of one laser diode is rotated 90° by a half-wave plate. The two laser beams with orthogonal polarizations are combined by a polarization beam splitter and transmitted into the atmosphere. The corresponding parallel- and perpendicular-polarized backscattering echoes are detected by the 45° tilted CMOS sensor using a time-division multiplexing scheme. A 24 h continuous atmospheric vertical profiling of the depolarization ratio has been performed by using the polarization Scheimpflug lidar system. The promising results successfully demonstrated that the present lidar system has potential for the polarization studies of atmospheric aerosols.
基于施密特原理的偏振施密特激光雷达系统已通过采用两个线性偏振808纳米激光二极管和一个互补金属氧化物半导体（CMOS）图像传感器开发而成。一个激光二极管的偏振通过一个半波片旋转90°。具有正交偏振的两束激光通过一个偏振分束器合并并传输到大气中。使用时分复用方案，45°倾斜的CMOS传感器检测相应的平行偏振和垂直偏振后向散射回波。利用偏振施密特激光雷达系统进行了24小时的大气垂直去偏振比连续探测。这些有前景的结果成功证明了当前的激光雷达系统在大气气溶胶偏振研究方面具有潜力。
