Optical desktop experimental results. (a) Coarse-phasing process. The initial PSF and corresponding modulated PSF are shown in (a1) and (a2). The differential MTF and extracted feature points are shown in (a3) and (a4). The scanning results and fitted Gaussian functions of six non-reference segments are shown in (a5). The corrected PSF and modulated PSF after coarse phasing are shown in (a6) and (a7). The differential MTF and the extracted height of peak after coarse phasing are shown in (a8) and (a9). (b) Fine-phasing process. (b1) Initial PSF before fine phasing. (b2) Phase-extracted from differential PTF. (b3) Corrected PSF after fine phasing.