 Worldwide, RealD 3D is installed in more than 26,500 auditoriums by approximately 1,200 exhibitors in 72 countries as of June 2015.RealD 3D cinema technology is a polarized 3D system that uses circularly polarized light to produce stereoscopic image projection.The advantage of circular polarization over linear polarization is that viewers are able to tilt their head and look about the theater naturally without seeing double or darkened images.