Fig. 1. Single lens imaging system

Fig. 2. Structure diagram of USAF1951 resolution version

Fig. 3. Experiment system of digital holographic microscopy

Fig. 4. Image plane intensity recorded by CCD and amplitude of simulated ideal images (8.32 mm ×8.32 mm). (a) Image plane intensity; (b) simulated ideal image amplitude

Fig. 5. Amplitude and phase diagrams of object plane (0.453 mm×0.453 mm). (a) Amplitude of object plane; (b) phase of object plane

Fig. 6. Spectral intensity of Fourier transform and circular filtering window image by two equations（1600/8.32 mm^-1×1600/8.32 mm^-1). (a) Eq. (17); (b) Eq. (6)

Fig. 7. Simulated intensity images by two equations. (a) Eq. (17); (b) Eq. (6)

Fig. 8. Image intensity curves obtained by two equations in the negative x-axis direction. (a) Eq. (17); (b) Eq. (6)

Fig. 9. Comparison of locally enlarged image by Eq. (17) and CCD measurement image for reconstructed image intensity. (a) Theoretical simulation result; (b) experimental measurement result

Fig. 10. Comparison between locally enlarged image by Eq. (6) and CCD measurement image for reconstructed image intensity. (a) Theoretical simulation result; (b) experimental measurement result

Fig. 11. Comparison of amplitude distribution of two types of image spectra. (a) Amplitude of ideal with secondary phase factor; (b) amplitude of digital hologram eliminating 0-order diffraction interference

Fig. 12. Comparison of reconstructed image intensity between theoretical simulation image and experimental reconstruction image. (a) Reconstruction image of theoretical simulation; (b) experimental reconstruction image