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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. |
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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==Audio and video== |
==Audio and video== |
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[[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]] |
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Added by Paul HedrickA 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.
