Fig. 1. Limited diffraction imaging experiment

Fig. 2. Experimental measurement and theoretical simulation results of intensity image (image plane size is 5.3 mm×5.3 mm). (a1) Experimental measurement without the aperture; (b1) experimental measurement with the aperture; (a2)(b2) simulation result of Eq.(2); (a3)(b3) simulation result of Eq.(3)

Fig. 3. Comparison of physical meanings of two transfer functions (width of images is 1024/5.3 mm^-1). (a) Spatial filter with ideal image Fresnel diffraction; (b) low-pass filter with ideal image frequency spectrum

Fig. 4. Experiment system of digital holographic microscopy

Fig. 5. Amplitude distribution and phase distribution of simulated object field. (a) Amplitude distribution; (b) phase distribution

Fig. 6. Theoretical simulation and experimental measurement results of off-axis digital hologram (8.32 mm×8.32 mm). (a) Simulated hologram; (b) experimental hologram

Fig. 7. Theoretical simulation and experimental measurement results of frequency spectrum of digital holograms (1600/8.32 mm^-1×1600/8.32 mm^-1). (a) Frequency spectrum of simulated hologram; (b) frequency spectrum of experimental hologram

Fig. 8. Theoretical simulation and experimental measurement results of the reconstructed amplitude distribution (8.32 mm×8.32 mm). (a) Simulation result; (b) experimental result

Fig. 9. Theoretical simulation and experimental measurement results of the reconstructed phase distribution (8.32 mm×8.32 mm). (a) Simulation result; (b) experimental result