Uwe Oehler has written a simple program that prints out fold-up paper templates for the conic sections that make up the reflective surface of a Fresnel mirror. Cut the templates out of cardboard, cover the cardboard with aluminum tape, fold up the sections, and apply them to a flat backing. Even the relatively simple, five ring, 59% coverage reflector shown in the video will burn holes in construction paper under modest sunlight. [via Hack a Day]
4 thoughts on “How-To: Fold-Up Fresnel Reflector”
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The “Uwe Oehler” link is broken. Should be http://www.dr-iguana.com/prj_flatpackmirror/
Thanks, and sorry. Should be fixed now!