Fig. 1. Light path diagram of the CSDOE

Fig. 2. The imaging process diagram through the CSDOE system

Fig. 3. Imaging process diagram

Fig. 4. Diagram of optical system with the CSDOE. (a) CSDOE structure diagram; (b) CSDOE imaging optical path

Fig. 5. Schematic diagram of the Fresnel surface. (a) Aspherical vector height diagram; (b) The outline of the Fresnel surface

Fig. 6. Diffraction efficiency curve of the CSDOE

Fig. 7. Spot diagram of the CSDOE

Fig. 8. Energy distribution matrix of color image with diffraction efficiency. (a) Energy distribution matrix figure as a whole; (b) The bottom detail of the energy distribution matrix

Fig. 9. The Zernike coefficient for each sampling point

Fig. 10. Constructed PSF and its cross section diagram. (a) 0°; (b) 1°; (c) 1.5°

Fig. 11. Image detail restoration results. (a) Original image; (b) Recovered image

Fig. 12. The system diagram containing the CSDOE

Fig. 13. Comparison of original images and recovered images results. (a), (d) Original images -Plaques; (b), (f) Original images -Trees; (c), (h) Original images -Building; (e), (j) Recovered images -Plaques; (g), (k) Recovered images -Trees; (i), (l) Recovered images -Building