Automated Angle Measurement System for Directions Transmission

The paper presents the results of development of an angle measurement system for measuring the angles between the normals to the mirrors setting the directions in space. The system operates in a dynamical mode with a continuously rotating platform on which an autocollimating null indicator is installed. The angles are measured by means of a holographic angle encoder installed on the rotor of the system. The results of the system testing and calibration are presented. The system is calibrated by comparing it to a reference optical polygon .