Hier mal ein ganz interessantes Projekt , jemand nutzt Solar Energie zum schneiden bzw um 3D Gegenstände herzustellen, aus Sand.

http://thisiscolossal.com/2011/06/ma...-laser-cutter/

Zitat:
"Industrial designer and tinkerer Markus Kayser spent the better part of a year building and experimenting with two fantastic devices that harness the sun’s power in some of the world’s harshest climates. The first he calls a Sun Cutter, a low-tech light cutter that uses a large ball lens to focus the sun’s rays onto a surface that’s moved by a cam-guided system. As the surface moves under the magnified light it cuts 2D components like a laser. The project was tested for the first time in August 2010 in the Egyptian desert and Kayser used thin plywood to create the parts for a few pairs of pretty sweet shades. But he didn’t stop there. ......"