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[[File:Wilson_solar_grill,_8-11.jpg|thumb|300px|The [[Wilson Solar Grill]] is being designed to be able to use latent [[heat storage]] to cook after sunset, collecting the heat with a [[Fresnel lens]].]] |
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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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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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==Recent news and developments== |
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[[File:Mueller_Solartechnik_Fresnel_test_cooker,_1-2-13.jpg|thumb|300px|TFC (Twin Fresnel Cooker]] |
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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: [[Media:SOLARTECHNIK_BERNIE_MUELLER,_1-2-13.pdf|TFC (Twin Fresnel Cooker) - Mueller Solartechnik]] |
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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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==Audio and video== |
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[[Video:4 SOLAR COOKING PASTA FRESNEL LENS STOVE OVEN SOLAR POWER|none|400px]] |
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[[Video:4 SOLAR COOKING PASTA FRESNEL LENS STOVE OVEN SOLAR POWER|none|400px]] |
Added by Paul Hedrick
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