Hologram region segmentation method for 3D holographic display

To enhance computational speed and reduce mutual crosstalk between layers in the design of 3D holograms using a layer-based method, this paper presents what we believe to be a novel hologram design approach based on region segmentation. The primary principle of this method involves partitioning the 3D object into multiple layers along the axial direction, followed by the design of corresponding sub-holograms. The reconstructed images are obtained by integrating digital blazed gratings with the appropriately positioned sub-holograms on the holographic plane. Theoretical analyses of Fresnel and Fraunhofer diffraction properties support this method, and we thoroughly investigate the variations in the position of the reconstructed image corresponding to each sub-hologram. Ultimately, this method is validated through simulations and experiments, demonstrating that it enables effective holographic displays of both 2D and 3D objects. This method offers distinct advantages for various types of objects, including improved computational speed and enhanced reconstruction quality, thereby providing an effective design strategy for real-time 3D holographic displays.