Two departments of displacement sensor with absolutely place detecting ability, displacement information of one period detecting system and period information detecting system,is also introduced.

• 探讨时，先从总体上分析绝对式偏振光位移传感器的检测原理，然后分别对单周期位移信息检测系统和周期信息检测系统两个子系统进行实现方法的讨论，最后提出传感器总的实现方法。