基于迭代修正的液晶相控阵激光雷达波控数据获取

分析了影响液晶相控阵波控数据获取的几个关键因素,在此基础上通过计算期望相位面与实际相位面的相位差,提出一种基于迭代修正的波控数据获取方法,该方法可通过改变加载在液晶阵列上的参考电压或改变参考相位面实现。讨论了算法关键参数的选择。通过仿真进一步研究了液晶特性曲线范围和高斯初始相位对波控数据获取的影响。仿真结果表明:该方法能获得比较准确的波控数据;液晶特性曲线范围对波控数据的准确获取非常重要,当曲线范围较大时,液晶相控阵可补偿高斯光束引入相位的影响。

Wave-control data acquisition for liquid crystal phased array lidar based on iterative correction

This paper analyzes several pivotal factors that influence the obtaining of wave-control data for liquid crystal phased array. On the basis of the analysis, the phase difference between the desired phase profile and the actual phase profile is computed, and an iterative method is proposed to obtain the wave-control data by changing the reference voltage or the reference phase profile of liquid crystal phased array. The selection of key parameters in the method is discussed, and the effects of the characteristic curve range and initial Gaussian phase are studied by simulations. As the simulation results shown, the method can accurately acquire wave-control data, and the characteristic curve range of liquid crystal is a very important factor in obtaining wave-control data. When the character