Fig. 1. Schematic showing the structure of 2-D Ronchi phase grating

Fig. 2. The diffraction-order efficiency distribution of 2-D Ronchi grating

Fig. 3. The physical procedure of quantitative phase measurement based on quadriwave lateral shearing interferometry

Fig. 4. The spectrum of interferogram when the grating period is different times of the pixel size

Fig. 5. The normalized intensity distributions of each diffraction order of 1-D Ronchi phase grating at different incident wavelengths

Fig. 6. The spectrum of interferogram at different phase delay

Fig. 7. Schematic and photograph of the experimental setup

Fig. 8. The experimental results of PMMA bead

Fig. 9. The reconstructed results of microlens array at different illuminations of light sources

Fig. 10. The experimental results of staphylococcus section