Efficient calibration of a two faced laser tracking system

Abstract

The Laser Tracking System LuxWess of the Institute of Flexible Automation, Vienna University of Technology, allows the non-contact, high precision position measurement of a retro reflector. For that purpose a laser beam from an interferometer is deflected by four mirrors and directed into the center of the measurement target. The target is tracked automatically by rotating the mirrors. In this way precision metrology of dynamic objects is possible. Before use, however, the laser tracking device has to be calibrated to achieve satisfactory results. In this thesis different methods to accomplish calibration are discussed. Each of these methods allows calibration without external measurement systems, but uses geometric constraints instead. By means of simulation it is investigated which method best suits given requirements and circumstances. The feasibility of the presented methods is demonstrated by experimental results.