3D Print with Sand (2011) [video]

Re:3D Print with Sand (2011) [video] by brink on Wednesday September 24, 2014 @11:30PM (#8365438)

What's more interesting is how much energy there is in just that screen's surface area of sunlight. Enough to turn sand molten in under a second. Thinking of just how far away that is from the sun, and how much more surface area there is in a sphere with a radius that size..

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Re:3D Print with Sand (2011) [video] by huuu on Thursday September 25, 2014 @02:40AM (#8365918)

A laser of 20-100 Watt is enough for Selected Laser Sintering.

So a square meter lens for the sun will give you more than ten times the power professional SLS printers are using.

That is indeed a lot.

Edit: here a nice answer about the heat generated: http://physics.stackexchange.com/a/103039

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Re:3D Print with Sand (2011) [video] by baddox on Thursday September 25, 2014 @12:07AM (#8365564)

I believe you can get around a kilowatt per square meter, obviously depending on latitude, weather, and other factors. That lens looks about like a square meter.

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Re:3D Print with Sand (2011) [video] by seiferteric on Thursday September 25, 2014 @12:18AM (#8365600)

*Kilowatt/m^2

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Re:3D Print with Sand (2011) [video] by baddox on Thursday September 25, 2014 @01:05AM (#8365722)

Yeah, that's the prefix I was looking for.

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