一种共路补偿激光漂移的直线度测量方法  

Measuring straightness method with common path compensation for laser drift

作　　者：匡萃方[1] 冯其波[1] 刘斌[1] 张斌[1] 

机构地区：[1]北京交通大学理学院,北京100044

出　　处：《光电工程》2005年第4期32-34,38,共4页Opto-Electronic Engineering

基　　金：北京交通大学优秀博士生科技创新基金(48003)

摘　　要：在激光基准长距离、高精度直线度测量中,空气扰动是影响其测量精度的一个主要因素。提出了一种简单的共路补偿空气扰动造成激光漂移的方法。角锥棱镜作为位置敏感器,四象限探测器探测角锥棱镜逆向反射光所携带的直线度误差,二维PSD和透镜用来监测空气扰动所带来的角度漂移。实验结果表明,通过补偿后,空气扰动所带来附加位置误差可以减少大约75%。Atmosphere turbulence is the major factor that affects the accuracy of the propagating direction of a laser beam, and causes serious errors in laser straightness measurement at long distance. A simple method of suppression of laser drift caused by air turbulence is put forward in the paper. With corner retro-reflector as position detector, the linearity error caused by reflection light of the corner retro-reflector is detected by a quadrant detector. 2-D position-sensitive detector and a lens are used to monitor angular drift caused by air turbulence. Experimental results show that the additional position error induced by air turbulence can be reduced by about 75%. Two-dimensional errors caused by air turbulence can be compensated simultaneously through common path.

关 键 词：直线度测量 共路补偿 角度漂移 空气扰动 

分 类 号：TN249[电子电信—物理电子学]