A wave-front measuring method for large scale telescope system
Based on the traditional Shark-Hartmann wave-front measurement,a wave-front measuring method suitable for large scale telescope system was proposed.A set of pentagonal prism beam turning devices were introduced to transfer quasi-reference beam to scan every sub-aperture,and an improved S-H sensor was used to measure the wave-front of every sub-aperture.The wave-front measuring errors,which were induced by the manufacturing and kinetic errors of pentagonal prism,were theoretically analyzed and proved to be correct by a wave-front compensation method.The errors of selfwavefront of large scale telescope was reproduced availably.The method can be applied to measuring the wave-front of large scale telescope.