First Multitouch prototype working

I've successfully gotten my first prototype working.

I mounted the lasers by drilling holes in the plexiglass and strapping them down using cable ties. I put a little electrical tape on the lasers to give them friction to keep them from rotating by accident.

The initial housing for the camera is simply cardboard made into a 2 ft cube. It's too short for my projector to focus fully or fill the area, but it is useable to show that things are working.

To make the projection surface I simply took 180 sandpaper lightly to the back side of the plexi. It seems to work just fine like that. The projector is bright, and the camera can see the fingers just fine as well.

Here are some pictures of the setup