Key Laboratory of Atmospheric Composition and Optical Radiation, Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China.
Opt Lett. 2013 Sep 1;38(17):3445-7. doi: 10.1364/OL.38.003445.
We have developed a differential column image motion (DCIM) lidar for measuring real-time vertical profiles of Fried's transverse coherence length (r0) and testing it against a differential image motion (DIM) lidar and a DIM monitor by observing stars throughout a range of turbulent conditions. With the DCIM lidar system parameters elaborately designed and the detector installed with an angle corresponding to the receiving telescope axis, the focal position of the laser guide star from a range of altitudes that coincide with the CCD's receiving area, r0 of different altitudes can be obtained simultaneously. The experiment results support the DCIM lidar and confirm that a high temporal and spatial resolution r0 profile can be measured with this method.
我们开发了一种差分列像移（DCIM）激光雷达，用于实时测量弗里德横向相干长度（r0）的垂直分布，并通过观察整个湍流条件范围内的恒星，将其与差分像移（DIM）激光雷达和 DIM 监视器进行对比测试。通过精心设计 DCIM 激光雷达系统参数，并将探测器安装在与接收望远镜轴相对应的角度上，激光导星的焦点位置可以在与 CCD 接收区域相匹配的一系列高度上，从而可以同时获得不同高度的 r0。实验结果支持 DCIM 激光雷达，并证实可以使用该方法测量具有高时间和空间分辨率的 r0 分布。
