激光微推力测试平台自动聚焦处理方法  

Auto-focus Method of Laser Micro-thrust Stand

作　　者：叶继飞[1] 王广宇[2] 洪延姬[2] 方娟[1] 

机构地区：[1]装备指挥技术学院研究生管理大队,北京101416 [2]装备指挥技术学院基础部,北京101416

出　　处：《装备指挥技术学院学报》2008年第4期99-102,共4页Journal of the Academy of Equipment Command & Technology

摘　　要：激光器的聚焦情况对于激光微推力测量过程中的实验结果有着重要影响。介绍了自动聚焦系统的设计思路、硬件组成和软件实施方案，着重讨论了光斑处理方法；针对观察系统采样光斑的特点，采用拟合高斯光强曲线和二阶矩定义下的光斑半径加权的方法，确定光斑大小，判断聚焦位置，实现了几十微米精度下的自动聚焦控制。The focused effect of laser is very important in laser micro-thrust measurement. The design, hardware and software scheme of auto-focus method are introduced in this paper, The spot processing method is discussed in detail, According to the sampling spot, the spot size is calculated, the Gaussian fitting curve and second moment definition are given, the position of laser waist is obtained, and the auto-focus control could be carried out with μm resolution.

关 键 词：激光微推力 光斑 高斯拟合 二阶矩 自动聚焦 

分 类 号：TN249[电子电信—物理电子学]