Right now, one of my active projects is a low power LASER Multitouch device.

I was given the LASER idea by http://arbi.trario.us/2008/11/02/diy-laser-multi-touch-table/ and it made immediate sense to me.

Please wear appropriate Safety goggles! these lasers are invisible and can blind you, bad combo.

I’ll post a link to the cheaper goggles we found in the comments later.

So far have the basic physical/optical structure including:

• Mitsubishi PK10 LED/DLP video projector (17 Watts)
• Sony PS3 Eye Camera, with IR cut filter removed and replaced with 780nm bandpass (<2.5 watts)
• MSI Wind netbook with Mac OS X Leopard (10-30 watts)
• 3mm Polycarbonate screen (roughly 1Meter on diagonal) backed with tracing mylar to rear project onto

We still have to install the 4x 780nm 25mw IR lasers with line optics.

Right now we plan to use Reactivision for blob tracking, and may make it a hybrid blob/active backlit fiducial system.

One goal has been to keep things simple and quick to build, so this is the result from 7-8 hours of work, including swapping the filters.

Stay tuned for LASER installation, software and testing.