Abstract: Aiming at the measurement requirements of wild, remote and dynamic coincidence degree, a sort of auto-collimation method based on quasi-parallel is proposed. Namely light-emitting and receiving are completed by a single instrument, the emanatory light is quasi-parallel light, glisten part is corner cube reflector, PSD or CCD converts the received light to electrical signals, and uses angles to express coincidence errors finally. Via static tests, it can be proved that the principle of the method is correct, the scheme is feasible, measure distances can reach up to km level, and the measurement results have a high accuracy. The method provides foundations for accurate tracking angles and development of special tracker.

Key words: Remote dynamic coincidence degree, Quasi-parallel light, Corner cube, Automatic tracking