E4 AV Tour: Optoma Demos Its Ultra Short Throw Interactive Projector With Laser Curtain OverlayApril 19, 2017 | Home / April 19, 2017 rave-video / E4 AV Tour: Optoma Demos Its Ultra Short Throw Interactive Projector With Laser Curtain Overlay Loading the player.... E4 AV Tour: Optoma Demos Its Ultra Short Throw Interactive Projector With Laser Curtain Overlay