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With the rapid developing of science and technology,large aperture optical system plays an important role in the high-tech fields including space optics,astronomical optics,inertial confinement fusion,the detecting and recognizing of space target.However,the problems of the wavefront sensing about large aperture optical system havent been totally solved yet because of equipment expenses and long manufacturing periods.In order to test the large aperture elements in optical system with cheaper costs and higher resolution,more and more attentions are paid into the wavefront sensing of large aperture optical systems.