Digital holographic three-dimensional video displays
Date
2011-02-04Source Title
Proceedings of the IEEE
Print ISSN
0018-9219
Publisher
IEEE
Volume
99
Issue
4
Pages
576 - 589
Language
English
Type
ArticleItem Usage Stats
185
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Abstract
Holography aims to record and regenerate volume
filling light fields to reproduce ghost-like 3-D images that are
optically indistinguishable from their physical 3-D originals.
Digital holographic video displays are pixelated devices on which
digital holograms can be written at video rates. Spatial light
modulators (SLMs) are used for such purposes in practice; even
though it is desirable to have SLMs that can modulate both the
phase and amplitude of the incident light at each pixel, usually
amplitude-only or phase-only SLMs are available. Many laboratories
have reported working prototypes using different designs.
Size and resolution of the SLMs are quite demanding for
satisfactory 3-D reconstructions. Space–bandwidth product
(SBP) seems like a good metric for quality analysis. Even though
moderate SBP is satisfactory for a stationary observer with no
lateral or rotational motion, the required SBP quickly increases
when such motion is allowed. Multi-SLM designs, especially over
curved surfaces, relieve high bandwidth requirements, and
therefore, are strong candidates for futuristic holographic video
displays. Holograms are quite robust to noise and quantization. It
is demonstrated that either laser or light-emitting diode (LED)
illumination is feasible. Current research momentum is increasing
with many exciting and encouraging results.