Based on characteristics of optical polarizing, Malus law, and Faraday optical rotation, a long-range displacementdetector is realized by same light source and double light route.
基于光的偏振特性、马吕斯定理和法拉第旋光效应,采用同光源双光路检测,实现了大量程直线位移的测量。
2
Point to point control is adopted because a stepping motor is used as a driver. A grating displacementdetector is applied in the feedback loop, forming a close loop control system.