Fig. 1. Digital holographic experimental system

Fig. 2. Comparison of CCD experimental measurement images of plane wave illumination and spherical wave illumination when aperture is at position P₂. (a) Plane wave illumination; (b) spherical wave illumination

Fig. 3. Relevant research images when aperture is at P₂ position. (a) Intensity image of plane wave illumination simulation image (4.14 mm×4.14 mm); (b) plane wave illumination CCD detection image (4.14 mm×4.14 mm); (c) spectrum amplitude image of ideal image with quadratic phase factor under plane wave illumination (289.85 mm^-1×289.85 mm^-1); (d) spectrum amplitude image transmitted by transfer function under plane wave illumination (289.85 mm^-1×289.85 mm^-1); (e) spectrum amplitude image of ideal image when R =-389 mm (289.85 mm^-1×289.85 mm^-1); (f) spectrum amplitude image of ideal image when R=-250 mm (289.85 mm^-1×289.85 mm^-1)

Fig. 4. Theoretical simulation and experimental measurement images of spherical wave illumination reconstructed image when aperture is at P₂ position (image width is 4.14 mm). (a) Reconstructed image phase of simulated hologram; (b) reconstructed image phase of experimental hologram; (c) phase of analog ideal image; (d) phase of ideal image reconstructed by experiment

Fig. 5. Theoretical simulation and experimental measurement images of plane wave illumination reconstructed image when aperture is at P₂ position (image width is 4.14 mm). (a) Reconstructed image phase of simulated ideal image; (b) reconstructed image phase of experimental ideal image