“…To address this, on-axis lensless Fourier phase-shifting configuration has been found to be the best solution in the maximum satisfaction for both the recording condition and the separating condition in DH. Furthermore, enlarging the numerical aperture (NA) of DH recording system, for example, short distance configuration [5,6], synthetic aperture configuration [7][8][9][10][11][12][13][14][15][16][17][18]and microscopy configuration [19][20][21][22][23][24], has been proven to be the effective approach in improving the resolution of the reconstructed image. Specially, since no extra components are added and complex adjustments are needed, spatial synthetic aperture digital holography (SADH) in which multiple subholograms are recorded by moving the CCD detector transversely to different spatial positions and composed a larger synthetic aperture digital hologram [8][9][10][11], has been widely employed to enlarge the NA of DH.…”