一种测量滚转角的新方法  

A Novel Method to Measure the Roll Angle Using a Transverse Zeeman Laser

作　　者：蒋弘[1] 殷纯永[1] 

机构地区：[1]清华大学精密仪器与机械学系,北京100084

出　　处：《中国激光》1999年第12期1085-1089,共5页Chinese Journal of Lasers

基　　金：国家自然科学基金!(No.59735120)

摘　　要：提出了一种基于横向塞曼激光器的滚转角测量系统,实现了大范围、高精度的滚转角测量。系统利用四分之一波片将横向塞曼激光器射出的正交线偏振光轻微椭偏化,检偏器作为滚转角传感器跟随被测件转动,再用光电探测器检测出射光的相位变化,得到检偏器的滚转角变化。这时相位变化与转角成非线性关系,在特定的角度上出现测量转角的灵敏度倍增区。采用这种方法,可以实现大范围的滚转角测量,并且在特定的角度上得到很高的灵敏度。使用分辨率为0.01°的相位计,滚转角的测量分辨率达到0.A roll angle measurement system using a transverse Zeeman laser is presented in this paper. It has a large measurement range and its sensitivity is nonlinearly enhanced. The transverse Zeeman laser provides a plane polarized light, which is changed to be slightly ellipse polarized by a quarter wave plate to enhance the sensitivity nonlinearly. Then, the beam passes a analyzer and the measurement signal is detected by a photo diode. By measuring the phase difference between the beat signal and the reference signal, the value of the rolla angle of the analyzer is got. By employing the phase detector that has the resolution of 0.01°, a sensitivity of 0.6″ in roll angle of the measurement system can be reached.

关 键 词：横向塞曼激光器 滚转角 测量系统 

分 类 号：TH82[机械工程—仪器科学与技术]