In order to inspect the surface topography of spherical target accurately,efficiently and exhaustively,which is the core component in inertial confinement fusion experiment,a shape detection system is founded based on the technologies of subaperture stitching and diffraction interferometry.The basic testing principle and the calculation method of lateral resolution in once single measurement are provided.The configuration of sub-aperture is planned for the rotation scanning of the target.In order to solve t...