激光传输过程中的信号捕获与自动跟踪研究

Research on signal acquisition and automatic tracking in laser transmission

以避免复杂因素影响下激光传输信号失真现象,降低激光传输过程中信号捕获与自动跟踪误差为重点,研究激光传输过程中的信号捕获与自动跟踪方法。激光器通过激光调制发射平台调制生成信号光,由光学组件折转后,折射至精指向机构反射镜,激光光束通过透视镜到四象限探测器上,四象限探测器求解捕获激光光斑的位置信息,经粗指向机构实现坐标标定捕获激光信号,捕获与自动跟踪单元采用卡尔曼滤波方法构建多线程驱动精指向机构实现激光信号的自动跟踪。经实验验证,该方法能够准确获得激光传输过程中的信号,激光信号光斑定位RMS误差均值仅为0.41像素,且具有较高跟踪效果。

In order to avoid the distortion of laser transmission signal under the influence of complex factors and reduce the errors of signal capture and automatic tracking in laser transmission,the method of signal capture and automatic tracking in laser transmission is studied.The laser is modulated by laser modulation and emission platform to generate signal light,which is the refraction to fine pointing mechanism mirror after being folded by optical module.The four-quadrant detector solves the position information of the laser spot.Coordinate calibration is used to capture laser signal.Experiments show that this method can accurately obtain the signal in the process of laser transmission.The average error of laser spot location RMS is only 0.41 pixels,and it has high tracking effect.