The viewer wears linearly polarized eyeglasses which also contain a pair of orthogonal polarizing filters oriented the same as the projector. To present a stereoscopic motion picture, two images are projected superimposed onto the same screen through orthogonal polarizing filters (Usually at 45 and 135 degrees). Multiple people can view the stereoscopic images at the same time. This is used to produce a three-dimensional effect by projecting the same scene into both eyes, but depicted from slightly different perspectives. As each filter passes only that light which is similarly polarized and blocks the light polarized in the opposite direction, each eye sees a different image. The viewer wears low-cost eyeglasses which contain a pair of different polarizing filters. To present stereoscopic images and films, two images are projected superimposed onto the same screen or display through different polarizing filters. Circularly polarized 3D glasses in front of an LCD (Liquid Crystal Display) tablet with a quarter-wave retarder on top of it the λ/4 plate at 45° produces a definite handedness, which is transmitted by the left filter but blocked by the right filter.Ī polarized 3D system uses polarization glasses to create the illusion of three-dimensional images by restricting the light that reaches each eye (an example of stereoscopy).