The study of optics measurement based on cyclic radial shearing interferometry

A method for optics measurement based on the cyclic radial shearing interferometry is proposed.The optical system for optics measurement is designed based on this technique.According to the wavefront reconstruction algorithm of the cyclic radial shearing interferometry,the reconstruction of a arbitrary wavefront is implemented from the corresponding CRSI interferogram.And experiments have been done successfully to measure the surface of a practical optics based on Keplerian telescope system.The results show that both the wavefront reconstruction algorithm and the optical system are able to exactly test the optics surface.And the repeatability of the setup is analyzed.