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Last edited: 2 January 2013
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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.
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
Navajo Students Native Sun Fresnel Solar Cooker.mov
Science teacher Paul McCarl inspired his students at Whitehorse High School in Montezuma Creek, Utah to build and enter a fresnel solar cooker in the Spirit of Innovation Award contest. The students' Native Sun Solar cooker which can make traditional fry bread was a finalist in the competition.
Sun Cart
See also
External links
- Designing a fresnel lens and mirror solar cooker - rimstar.org
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