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[[File:Mueller_Solartechnik_Fresnel_test_cooker,_1-2-13.jpg|thumb|300px|The [[Twin Fresnel Cooker]]]]
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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.
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==Recent news and developments==
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*'''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: [[Twin Fresnel Cooker]]
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==Audio and video==
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[[Video:4 SOLAR COOKING PASTA FRESNEL LENS STOVE OVEN SOLAR POWER|none|400px]]
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==See also==
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*[[Fresnel reflectors]]
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*[[Wikipedia:Fresnel lens]]
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==External links==
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* [http://rimstar.org/renewnrg/fresnel_lens_mirror_solar_cooker_design.htm Designing a fresnel lens and mirror solar cooker] - ''rimstar.org''
 
[[Category:Solar cooker designs]]
 
[[Category:Solar cooker designs]]

Revision as of 17:36, 24 May 2014

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Last edited: 2 January 2013      
Mueller Solartechnik Fresnel test cooker, 1-2-13

The Twin Fresnel Cooker

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: Twin Fresnel Cooker

Audio and video

none|400px

See also

External links

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