Circular holographic video display system

Abstract

A circular holographic video display system reconstructs holographic video. Phase-only spatial light modulators are tiled in a circular configuration in order to increase the field of view. A beam-splitter is used to align the active area of the SLMs side by side without any gap. With the help of this configuration observers can see 3D ghost-like image floating in space and can move and rotate around the object. The 3D reconstructions can be observed binocularly. Experimental results are satisfactory.

3D Capture and 3D Contents Generation for Holographic Imaging

“…Under coherent illumination, a circular arrangement of SLMs puts less severe requirements to the space-bandwidth product of the display and supports full-parallax binocular vision at an increased viewing angle. Different circular configurations have been recently proposed [24][25][26].…”

“…The detailed description of the capture and display systems is given in Refs. [25,28]. Here, we focus only on data transfer from the holograms to SLMs.…”

“…The nine phase-only SLMs in the display set-up were characterized by N xd · N yd ¼ 1920 x 1080 pixels, a pixel period Δ d ¼8 μm and phase modulation from 0 to 2π; the illuminating wavelength was λ d ¼ 0.532 μm. The SLMs, arranged in a circular configuration, were illuminated with a single astigmatic expanding wave by means of a cone mirror whose apex was at a distance D s from the point light source positioned on the line of the cone mirror axis [25]:…”

“…The object beam Oðx, yÞ in this case was provided by simulation of a noiseless diffraction tomography experiment in which transmission Figure 4. Schematic diagram of the chain holographic capture-data transfer-holographic display for far-infrared capture of a large object [29] and visible light visualization [25].…”

Spatiotemporal multiplexing method for visual field of view extension in holographic displays with naked eye observation

“…The good example of the second approach is the "active tiling" system developed by QuinetiQ [9], however, the hardware connected with this system (based on combina− tion of electrically and optically addressed SLM and multi− ple optics) is highly complicated. The second approach is also realized by means of creating larger display through combining reflective type SLMs into flat or curved panel [10][11][12][13][14]. The most common devices used in holographic dis− plays are Liquid Crystal on Silicon (LCoS) spatial light modulators (SLMs) which provide the highest diffraction efficiency and reconstruction accuracy [16].…”