I would like to use a multi-touch screen on top of a display, not using a projector.
This means that the multi-touch screen has to be transparent and the camera can not be positioned below the screen, but at the side.

Is it possible, to use a transparent multi touch screen, without a diffuser, for multi-touch tracking?
Is it possible to use a camera from the side, not from directly below the screen?

I am looking forward to your replies!