一种新的滚转角检测方法

A Novel Method of Rolling Angle Measurement

利用两块液晶光阀或者直接调制双半导体激光器(LD)产生分时交替传播的正交双偏振平行光,通过检测正交双偏振光经过检偏器后的光强差值的幅度和相位,得到滚转角的大小和转动方向。介绍了该方法的工作原理及实验装置。实验证明,该方法具有良好的线性,分辨率优于2″。

A novel method of dynamical rolling angle measurement was presented based on polarization testing.Two liquid crystal light valves or two lasers were used to produce orthogonal polarized lights,which pass through an analyzer in different time and their power difference was detected representing the rolling angle.Experiments show that the method is of good linearity and the resolution is better than 2'.