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Fresnel lensesPopular Science
•81% Informative
At 0.6 nanometers thick and half a millimeter wide, the world’s thinnest Fresnel lens is just three atoms of a material called tungsten disulphide.
The material's quantum properties make it particularly suitable for forming atomic lattice work that resembles the flat “Fresnel lens” often seen in lighthouse lamps.
In this design, the focusing power is derived from the material's unique quantum effects.
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