So Junior Veloso just decides he wants to build his own 3D printer using visible light. His solution is to use a DLP projector to cure visible light-sensitive resin. Just like stereolithography, the rig builds the part on a platten coated with a thin (.01mm) layer of light-curable resin where the projector projects the shape to be built.
I would think that if you had a projector with a high enough resolution (right now he’s using a 1024×768 projector), this might be faster than the mirror-aimed laser used for SLAs since the entire layer would be cured simultaneously. So far, his early samples are pretty nice. Take a look at Junior’s progress on his blog.
[via Hack a Day]