. Yet
apart from certain specialized niches, display holograms are
perhaps more rarely encountered in everyday life than they
were 20 or 30 years ago. But the recent resurgence of interest
in 3-D video for entertainment applications has underlined the
limitations of left/right stereoscopic imaging and created a
desire for more natural 3-D imagery in which no glasses are
required and all perceptual cues to depth are provided in a
consistent fashion.