Media Labis
building a prototype color holographic-video display whose resolution is
roughly that of a standard-definition TV and which can update video images 30
times a second, fast enough to produce the illusion of motion. The heart of the
display is an optical chip, resembling a microscope slide, that Smalley built,
using only MIT facilities, for about $10.
"Until now, if you wanted to
make a light modulator for a video projector, or an LCD panel for a TV, or
something like that, you had to deal with the red light, the green light and
the blue light separately," he says. "If you look closely at an LCD
panel, each pixel actually has three little color filters in it. There's a red
subpixel, a green subpixel and a blue subpixel."
"First of all," he
continues, "that's inefficient, because the filters, even if they were
perfect, would throw away two-thirds of the light. But second, it reduces
either the resolution or the speed at which the modulator can operate."
According to Smalley, on the
other hand, "What's most exciting about [the new chip] is that it's a
waveguide-based platform, which is a major departure from every other type of
spatial light modulator used for holographic video right now."
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