A Fresnel lens is a lens that works like a convex lens, but which eliminates the bulk of such a lens by the use of a series of angled steps in the front surface of an otherwise flat sheet of glass or plastic. The steps are angled in such a way as to concentrate light at the focus.

Recent news and developments

• December 2012: Bernhard Müller has published findings based on his experimentation with a twin Fresnel lens reflector solar cooker. This cooker was never meant to be a production prototype, and his company, Mueller Solartechnik, no longer manufactures solar cookers. As an engineering exercise, he has shown that incorporating the Fresnel lens produces quite high temperatures(278.6°C/534°F). However, the usable cooking area is small. Read more: TFC (Twin Fresnel Cooker) - Mueller Solartechnik

Audio and video

4 SOLAR COOKING PASTA FRESNEL LENS STOVE OVEN SOLAR POWER(06:10)
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See also

• Fresnel reflectors
• Wikipedia:Fresnel lens

External links

• Designing a fresnel lens and mirror solar cooker - rimstar.org