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0.00018° A roll angle measurement system based on transverse Zeeman laser is proposed to realize wide range and high precision roll angle measurement. The system uses a quarter-wave plate to slightly elliptically depolarize the orthogonal linearly polarized light emitted by the transverse Zeeman laser. The analyzer acts as a roll angle sensor to follow the rotation of the device under test and then detects the phase change of the emitted light with a photodetector. The analyzer’s roll angle changes. In this case, the phase change is a nonlinear relationship with the turning angle, and the sensitive multiplication zone of the measuring turning angle appears at a specific angle. With this method, a wide range of roll angle measurements can be achieved with high sensitivity at a particular angle. Using a phase meter with a resolution of 0.01 °, the roll angle measurement resolution is 0.00018 °