Fig. 1. Schematic diagram of radial shearing interference

Fig. 2. Simulated four-step phase-shifting radial shearing interferograms

Fig. 3. Implementation flow of iterative wavefront reconstruction algorithm

Fig. 4. Comparison of reconstruction results of two algorithms

Fig. 5. Cross-section data in middle row of reconstruction wavefront

Fig. 6. Reconstruction results comparison of different orders of Zernike aberration with two algorithms

Fig. 7. Variation of reconstruction errors of combined aberration with center offset

Fig. 8. Variation of reconstruction error of single-order Zernike aberration with center offset

Fig. 9. Reconstruction error of part of single-order Zernike aberrations

Fig. 10. Influence of center offset calculation error on wavefront reconstruction accuracy