A Moire Fringe Device Used on the Satellite Tracking Camera SBG

As the senser for the displacement,a Moire fringe device is attached to the moving plate carriage of the satellite tracking camera SBG at Yunnan Observatory.A microcomputer is used to gather and reduce the deta.By means of this method,the timing accuracy of SBG is improved.The principle,design,structure and adjustment of the device are introduced in this paper.Some results are also reported here.When the Moire fringe device was attached.