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Submission + - NC State Almost Doubles Light Efficiency For Pico Projectors (laserfocusworld.com)

szquirrel writes: Researchers from North Carolina State University sponsored by ImageOptix Corporation have developed new a polarization conversion system that makes LED-lit projectors much more efficient. Unlike an ordinary polarizing filter, which wastes more than 50% of the light passing through it, the new system splits, aligns, and recombines the polarized beams to use 90% of the original unpolarized light. Tiny projectors could shine twice as bright or twice as long with much less cooling and the system is even small enough to embed in a smartphone or tablet.
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NC State Almost Doubles Light Efficiency For Pico Projectors

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I like work; it fascinates me; I can sit and look at it for hours.