Fig. 1. WRP method^[25]. (a) Outline of WRP method; (b) calculation region

Fig. 2. M-WRPs method^[27]

Fig. 3. Diagram of depth-range creation and WRP positioning based on L using the MDR method^[30]. (a) Setting temporary depth range 1 with 2L; (b) re-positioning WRP 1 in the center of effective depth range 1 and then diffracting to the CGH plane; (c) setting temporary depth range 2 with 2L; (d) re-positioning WRP 2 in the center of effective depth range 2 and then diffracting to the CGH plane

Fig. 4. LUT method^[31]. (a) Outline of the LUT method; (b) calculation region

Fig. 5. Schematic of UM-WRPs method^[38]

Fig. 6. WRP method with a limiting diffraction region^[25]. (a) WRP method with a limiting diffraction region; (b) limiting diffraction region

Fig. 7. Schematic of CCGH calculation(top view) ^[41]. (a) DC method; (b) AC method

Fig. 8. Schematic of multiple off-axis WRP^[45]. (a) Side view; (b) top view