基于四象限探测器的光束智能校正系统设计  

Design of an automatic system based on four-quadrant detector for beam-adjustment

作　　者：石川[1] 刘儒贞[1] 陈金令[1] 谢德林[1] 

机构地区：[1]中国科学院光电技术研究所

出　　处：《仪器仪表用户》2007年第3期44-46,共3页Instrumentation

摘　　要：针对工程应用中手动光束校正精度低．效率低．仪器笨重的问题,设计一套嵌入式光束自主校正系统,它利用高精度的四象限探测器检测光束偏移信号,以CPLO芯片作外围电路,DSP进行内部数据处理,再驱动步进电机控制平面摆镜,构成简单闭环回路．以此达到光束自动校正的目的．该嵌入式系统精度高,速度快,体积小,可极大地方便光束校正操作．同时由于引入新的搜索算法可以极大地提高整体系统的光束校正范围．An automatic system based on four-quadrant detector for beam-adjustment is designed against the problem of low precisenes s, awful efficiency and unwieldiness by hand in the application, it gathers the bias signal from the high-precise four-quadrant detector, constructs the periphery circuit with CPLD（ Complex Programmable Logic Device）, processes the digital data by DSP（Digital Signal Processor）, and drives two step-motors in loop to control the angle of Each plane mirror for adjusting the light-beam. This system is high -precise, quick, and smart, so it can make the process of adjustment of light beam convenient. Meanwhile it enlarges the scale of light -beam adjustment for a new search algorithm.

关 键 词：四象限探测器 DSP CPLD 步进电机 光电校正 

分 类 号：TP212.14[自动化与计算机技术—检测技术与自动化装置]