Fig. 1. Walsh function. (a) Sector elements generated by segmentation; (b) Walsh functions in two-dimensional polar coordinate

Fig. 2. Equivalent phase of wavefront

Fig. 3. Incident wavefront. (a) Wavefront shape; (b) Zernike polynomial coefficients

Fig. 4. Phase reconstruction. (a) Wrapped phase; (b) equivalent phase

Fig. 5. Equivalent phase of the Zernike polynomials

Fig. 6. Results of the Zernike polynomial coefficients. (a) Zernike polynomial coefficients; (b) error values of the retrieval Zernike polynomial coefficients

Fig. 7. Wavefront reconstruction results. (a) Reconstructed wavefront; (b) wavefront reconstruction error

Fig. 8. Phase reconstruction results based on the equivalent phase matrix. (a) Equivalent phase of the incident wavefront; (b) equivalent phase of the wavefront reconstruction; (c) error of the equivalent phase reconstruction