Patent ID: 7301613

Claim:
A device for analysing a wavefront, of the Hartman or Shack-Hartmann type, comprising in particular a set of sampling elements arranged in an analysis plane, and forming as many sub-pupils (C) for sampling the incident wavefront, and a diffraction plane wherein the diffraction spots of the different sub-pupils illuminated by the incident wavefront are analyzed, characterised in that the shape of each sub-pupil is such that the associated diffraction figure (FC) has in the diffraction plane one or several preferential axes (X 1 , Y 1 , X 2 , Y 2 ), and in that the sub-pupils are oriented in the analysis plane so that the preferential axes of the diffraction figure of a sub-pupil are offset relative to the preferential axes of the diffraction figures of neighbouring sub-pupils, thereby enabling to limit the overlapping of the diffraction figures, wherein the device is of the Hartman or Shack-Hartmann type.