3D display with wide viewing zone using holograms with reduced information

The superimposing method for information reduction in hologram is compared with the sampling method to clarify their features. 3D images with motion parallax are reproduced in the wide viewing zone from holograms with reduced information. The visual field is divided in several fields for displaying visual depth of the image under reduced information, and partial images in divided visual fields are separately recorded on several Fourier transform holograms (FTHs). A time-sharing display system is developed to reconstruct the 3D image in real time from several FTHs. Experiments are carried out for reconstruction of the practical 3D image from recorded holograms. Results show that resolution of the image is improved, and the speckle noise is suppressed by the superimposing method. Observer can perceive motion parallax of the image with wide viewing zone by viewing a pair of stereoscopic images from right-eye and left-eye positions. Observer can also perceive the correct visual depth of images through a parallax-fusing perceptual phenomenon.