Variable-shear-ratio radial shear interference system

The invention discloses a variable-shear-ratio radial shear interference system which is used for measuring wavefront. The system comprises a shear interference unit, a shear ratio regulation and control unit and a wavefront detection unit. To-be-detected signal wavefront firstly enters the shear interference unit composed of a pair of multi-focus photon screens to generate amplified and reduced wavefront, then the shear ratio change is controlled through the shear ratio regulation and control unit, finally, imaging is performed through the wavefront detection unit, a radial shear interference pattern is obtained, and the original wavefront can be restored through an algorithm subsequently. According to the variable-shear-ratio radial shear interference system disclosed by the invention, aiming at the defects that the shear ratio of existing radial shear interference is fixed and a shear system needs to be independently built, the selectivity of the shear ratio is improved by adopting a multi-focus photon sie