Fig. 1. Working principle of HWFS. (a) Working principle diagram of HWFS; (b) generation and working principle of CGH; (c) phase map of multimode composite binary phase hologram; (d) diffraction result on detection plane of holographic template shown in Fig. 1(c)

Fig. 2. Design of intensity hologram for single-mode BPCGH. (a) Phase delay and transmissivity of single mode binary phase CGH; (b) zoomed display of dotted squared curve in Fig. 2(a); (c) diffracted light intensity of CGH on detection plane; (d) transmissivity map of virtual mask on detection plane (transmissivity is 1 at circle areas and 0 at other area); (e) phase delay and transmissivity curves of H'; (f) zoomed display of dotted squared curves in Fig. 2(e); (g) diffracted light intensity of BPCGH with complex transmissivity of H″

Fig. 3. Diffraction effect of multimode composite CGH. (a) Diffraction result of multimode composite binary phase CGH (top left inset of Fig. 3(a) is phase map of CGH); (b) normalized intensity along dotted line in Fig. 3(a); (c) diffraction result of CGH in Fig. 3(a) with additional intensity hologram (top left inset is phase map of new CGH, left bottom inset is intensity of new CGH, and top right inset is virtual mask transmittance); (d) normalized intensity along dotted line in Fig. 3(c)

Fig. 4. Diffraction effect of various virtual masks. (a)--(e) Various virtual masks and corresponding intensity holograms (lower right inset); (f)--(j) diffraction light intensity of BPCGH with additional intensity hologram

Fig. 5. Intensity modulation effect of single-mode continuous phased CGH. (a) Phase delay and transmissivity curves of single mode continuous phased CGH; (b) zoomed display of curve in dotted square in Fig. 5(a); (c) diffraction intensity of CHG at detection plane; (d) transmissivity of virtual mask before detection plane; (e) transmissivity and phase delay curves of H'; (f) zoomed curves in dotted square in Fig. 5(e); (g) diffraction light intensity of CGH with complex transmissivity of H″