Super-resolution Experimental Study of Digital Holographic Microscopy Based on POCS

In order to improve the reconstruction effect of digital holographic microscopy system, the Project Onto Convex Set (POCS) algorithm is applied to digital holography to achieve super-resolution reconstruction of hologram. Firstly, based on the theory of digital holography and POCS algorithm, the optical path of transmissive off-axis digital holography is established. Then, the resolution board is used to verify the effectiveness of the POCS algorithm in hologram super-resolution restoration. Finally, the feasibility of the method in 3D reconstruction is verified by microlens array. The residual estimation results of the low-resolution hologram and the super-resolution restored hologram are respectively estimated by the three-dimensional reconstruction result of the reference hologram. The PV and RMS of the latter residuals are reduced by 36.88% and 70.66%, respectively, which proves that the method can achieve super-resolution reconstruction of digital holography.