激光测速仪定焦系统设计  

Design of Fixed Focus System for Laser Velocimeter

作　　者：吕丹 林军 周健[4] LÜDan;LIN Jun;ZHOU Jian(Fujian Metrology Institute,Fuzhou,Fujian 350003,China;Key Laboratory for Fujian Energy Metrology,Fuzhou,Fujian 350003,China;National Urban Energy Metrology Center(FJ),Fuzhou,Fujian 350003,China;National University of Defense Technology,Changsha,Hunan 410000,China)

机构地区：[1]福建省计量科学研究院,福建福州350003 [2]福建省能源计量重点实验室,福建福州350003 [3]国家城市能源计量中心(福建),福建福州350003 [4]国防科技大学,湖南长沙410000

出　　处：《计量学报》2021年第4期511-514,共4页Acta Metrologica Sinica

基　　金：福建省质量技术监督局科技计划项目(FJQI2013090;FJQI2014032)。

摘　　要：为满足激光测速仪在米级距离的测速需要,设计了一种激光测速仪定焦系统。通过光束分析仪测量距离激光出射口不同位置处的光斑半径,利用函数拟合的方法得到激光束腰斑半径与腰斑位置。采用望远镜系统作为定焦系统的基本结构,通过MATLAB软件穷举定焦系统的各项参数,记录满足条件的参数。根据操作过程中的实际条件选择其中一种数据搭建定焦系统,作用于激光测速仪的探测激光,在4.5 m或5.5 m处光斑半径小于0.6 mm,符合预期目标。To meet the speed measurement needs of laser velocimeter in meter level distance,a fixed focus system for laser velocimeter was designed.First,the spot radius at different positions from laser exit were measured by beam profiler,then the waist radius and position of laser beam were got by the function fitting method.The telescope system is used as the basic structure of the fixed focus system,the parameters of fixed focus system were exhausted by MATLAB software,and all the satisfied parameters were recorded.According to the actual conditions,a set of data was chosen to apply to laser velocimeter,the laser spot radius is less than 0.6 mm at 4.5 m and 5.5 m,which matched the expectations.

关 键 词：计量学 激光测速仪 定焦系统 高斯光束 

分 类 号：TB934[一般工业技术—计量学]