I’m no specialist, so please correct me if I’m wrong. AFAIK, the problem with lasers hitting someone’s eyes is that the light if very focused and concentrated. Once the beam hits an object, provided it’s not mirror-like, it gets diffused and becomes as harmful as any other light source at the same intensity.

Am I missing something or is this line of thought correct?

Yes you’re right, if you are using a line generator or something to diffuse the laser beam you won’t have to wear glasses when you use your multitouch table, but you can’t look right into the beam !

Just to let you know that I posted a new thread about the Airplane controller, our LLP setup for ordinary surfaces:

http://nuigroup.com/forums/viewthread/7504/

Cheers

Alain