RMSE per Zernike mode, following the Noll convention, starting from the defocus mode. Four cases were compared (see Table 2 for notations), using a single in-focus post-VVC PSF without splitting the polarization states (cyan), two post-VVC PSFs with additional defocus (dark blue), the two post-VVC PSFs associated with each polarization state (red), and a single PSF after the SVC (orange). The RMSE of the input phase maps is represented in black and the even modes are indicated by the green areas. Left: input WFE of 70 nm distributed over 18 modes. Right: input WFE of 350 nm distributed over 88 modes. In both examples, the S/N in the entrance pupil plane is equal to 100.