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Innovation

Flat-pack lens boosts solar power

Fresnel lens concentrates solar without bulk
Micro-machining could be used to create almost flat, Fresnel lenses, that boost the electrical efficiency of solar panels, according to researchers in China.

Fresnel lenses were invented by French engineer and scientist Augustin-Jean Fresnel, in the early nineteenth century, they are essential two-dimensional equivalents of conventional optical lens, but they have ridges in concentric rings that focus the light to a point behind the lens

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