The UNIPOAR 3D SYSTEM for cinemas is a polarized 3D system, that is based on the projector presenting a alternating segments of circularly polarized material. Mounted in front of the projector lens, this filter is synchronized to the projected images, giving each frame a polarization perpendicular to the previous one, which can be viewed with polarized 3D glasses. In earlier, the filter wheel can be lowered out of the lens' path for non-3D material.[1] It has been noted that an earlier version of the spinning polarized filter malfunctioned, but the problem has been addressed with an updated replacement filter which was supplied to all theaters using the electronic shutter method system. UNIPOAR 3D SYSTEM offers different types of 3D cinema technology (including those based on a polarized filter, as well as solid-state liquid crystal, based on different cinema configurations. The company also provides passive 3D EYEWEAR that is optically matched to their 3D systems.