采用四象限探测器的光斑中心定位算法

Laser Spot Center Location Algorithm Based on Four Quadrant Detector

为提高激光发射系统的监测精度,提出了一种基于四象限探测器的光斑中心定位算法,首先采用均匀分布的椭圆模型对光斑进行分析,根据四象限探测器工作原理,通过计算椭圆形光斑在四象限探测器上各对应区域所占面积进而推导光斑中心坐标表达式,然后采用解析几何的方法求取椭圆光斑的长轴与短轴,最后搭建四象限监测系统对算法进行实验验证;结果表明,所提算法能有效提高四象限探测器的光束监测精度,较传统方法精度提高21.3%。

In order to improve the monitoring accuracy of laser emission system, proposes a spot center location algorithm based on the four quadrant detector, first using the elliptical model uniformly distributed on the spot to carry on the analysis, based on the four quadrant detector working principle, by calculating the oval spot in the four quadrant detector corresponding areas on the area and derive the spot cen ter coordinate expression, then the analytic geometry method for Elliptic Spot long axis and short axis, finally, four quadrant monitoring systern was verified by experiments, the results show that the proposed algorithm, beam monitoring accuracy algorithm can effectively improve the four quadrant detector, compared with the traditional methods, improve the accuracy of 21.3%.