Vortex rear projection screen. The Vortex is a marriage of the best features of two rear screen technologies--optical and diffusion.
DiamondScreen™—the first rear projection screen designed specifically to address brightness uniformity. Unlike conventional rear screens, the DiamondScreen is cast (molded) and derives its incredible optical performance from its patented Fresnel/lenticular lens system. Well suited for most A/V applications except those with large vertical viewing cones Uniform resolution compatibility.