Hi! tank you for your interest!
The set up is made of a custom steel frame associate with exotic wood parts.
We are using 6 AIXIZ lasers 850nm x 25mW with line generators 60°. Lasers are housing in the circular steel part around the screen, and the beam is stoped by this same part (if you look closely you can see the sceen plane which is 2cm under the wood plane).
The projector resolution is 1024x768 which is a little poor for text display as the screen resolution is 768 pixels on the diameter.
But it works realy fine as with 3D contents (DLP link technology) and with graphical stuffs like images and videos.
For the dimentions it’s:
_1.4m total diameter
_0.85 usefull diameter (multitouch screen)
If you have any other questions let me know!