Thin silicon lenses dramatically reduce cost of thermal imaging | Gizmag

by John Payne

24 May 2014

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“Silicon normally doesn’t work for such lenses, as the material tends to absorb too much light, allowing little to get through to the camera’s image sensor. A team of French researchers, however, discovered that this isn’t a problem if the lens is very thin. They proceeded to laser-etch a Fresnel-style silicon lens, in which light is focused using concentric rings of material.”

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John Payne

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