[[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]].]]
[[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]].]]
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.
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.
*'''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]]
==Audio and video==
==Audio and video==
[[Video:4 SOLAR COOKING PASTA FRESNEL LENS STOVE OVEN SOLAR POWER|none|400px]]
[[Video:4 SOLAR COOKING PASTA FRESNEL LENS STOVE OVEN SOLAR POWER|none|400px]]
Revision as of 18:44, January 2, 2013
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.
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.
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
Added by Paul Hedrick
