Enhancement on the generation of sampled phase-only holograms

Fig. 4. Numerical reconstructed of the EESPOHs of the object images (a) “star” and (b) “eye”; numerical reconstructed images of POHs generated with random phase noise added to the original (c) “star” and (d) “eye” images.

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Fig. 5. Optical reconstructed images of the SPOHs of the object images (a) “star” and (b) “eye”; optical reconstructed images of the EESPOHs of the object images (c) “star” and (d) “eye”.

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Table 1. Comparison of Several Modern Methods for Generating POHs

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Table 1. Comparison of Several Modern Methods for Generating POHs

Method	Quality of Reconstructed Image/Advantages	Disadvantages
Spatial multiplexing^[11–13,15]	High/computationally efficient	Only half of the display area is utilized Complicated optical setting involving high-resolution grating
GS or iterative Fresnel transform^[16,17]	High/computationally intensive	Computationally intensive Suitable for 3D scenes comprising of small number of plane images
Complex modulation^[18]	High/computationally efficient	Requires optical filtering
OSPR^[19]	Good/computationally intensive	Reconstructed image contaminated with noise Requires generation of multiple hologram frames to attenuate the noise
Error diffusion^[20,21]	High/computationally efficient	Intensity of reconstructed image is low
SPOH^[25]	Good/computationally efficient	Lines and edge patterns are degraded

Table 2. Optical Settings for Generating the Digital Hologram
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Table 2. Optical Settings for Generating the Digital Hologram
Wavelength $λ$ 633 nm Hologram size $2048 \times 2048$
Pixel size $8 μm \times 8 μm$ Image size $1024 \times 1024$