Design and Realization of a Synchronized Rotating Shutter for a Laser Range Finder on the 1.2m Telescope of YNAO

This paper describes a design of the control of the synchronized rotation of two stepping motors with phase difference.According to the design, a control circuit was built to achieve the function of a synchronized rotating shutter.The synchronization accuracy was achieved to be within one step of a motor.This device can be used to protect the single-photon detector on a laser range finder.