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**DoomsdaysCW** @DoomsdaysCW@kolektiva.social · Mar 2

Mar 2

DoomsdaysCW @DoomsdaysCW@kolektiva.social

@RoboticistDuck @jblue I did find some articles about #Fresnel technology (once used in lighthouses) being incorporated into solar designs.

**Judy Anderson** @nosrednayduj@hachyderm.io · Dec 23, 2023

Dec 23, 2023

Judy Anderson @nosrednayduj@hachyderm.io

On #solstice, we have a tradition of making fire from the sun, with a #Fresnel lens. Yesterday was beautifully sunny and it went off smoothly. (Sometimes there are issues.)

$On the left, about 1/3 of a 10-inch piece of flat square plastic with circular scores and some odd refraction patterns is visible with part of a hand holding it. It is focusing the sun's light on a pile of tinder made of some wood shavings. The tinder is on a brown six-inch square tile with a short "fence" of hardware cloth (half inch square wire mesh, 2 inches tall and 6 inches wide) behind it. Beyond the tile is a pair of sunglasses. On the right there is a mailing tube in the foreground and a roll of deer netting (also half-inch square mesh, this time of black plastic). Tile, glasses, and deer netting roll are on a wood cabinet. Further in the background is a white plastic milk crate with some bottles, on a red tile floor with gray grout.$

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