Wednesday, January 16, 2013
Fresnel lens - what is it, testing focal length, solar heat generated
12:16 PM | 
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Fresnel lens - what is it, testing focal length, solar heat generated Video Clips. Duration : 8.38 Mins.
Things I learned about fresnel lenses when I made my solar cooker. What is a fresnel lens? Should the grooved side face the sun or the flat side? Is the focal length the same ie same focal point? Is the heat output the same? Why do I get the results I do? What is spherical aberration? What are different types of fresnel lenses? The large fresnel lens came from a rear projection TV. The smaller fresnel lens is a magnifying glass. For more see: rimstar.org An excellent document about fresnel lenses that confirms my test results: www.fresneltech.com - rimstar.org
Things I learned about fresnel lenses when I made my solar cooker. What is a fresnel lens? Should the grooved side face the sun or the flat side? Is the focal length the same ie same focal point? Is the heat output the same? Why do I get the results I do? What is spherical aberration? What are different types of fresnel lenses? The large fresnel lens came from a rear projection TV. The smaller fresnel lens is a magnifying glass. For more see: rimstar.org An excellent document about fresnel lenses that confirms my test results: www.fresneltech.com - rimstar.org
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