How do Polarized 3D Glasses work?
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Stereoscopy is a technique used to create a three-dimensional illusion by narrowing the margin of light that enters the eye using Polarized 3D glasses for the effect. Two images are eventually projected onto the same theatre screen, superimposed to present a specific film. With a pair of orthogonal polarizing filters, the viewer can afford these eyeglasses due to its low cost and high quality. Since each filter will only admit light that is similar in polarization while also blocking the perpendicular polarized light, each of the eyes will see only one of the images, thus creating the said effect.

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The difficulty arises because light reflected from a motion picture screen tends to lose a bit of its polarization. Using so-called silver screen– actually coated in aluminum– will solve the problem. A station using dual head graphic cards, a silver display surface, a few polarizing filters, and properly aligned DLP hardware can be utilized to create a reasonably priced system. (under US$10 000 in 2003) For people wearing polarized glasses this is the perfect system for displaying 3d data Several commercial and open source packages were made available thanks to the system GeoWall, used for some time now in the Earth Sciences.
An image combiner can easily be used in order to present dual images to a single viewer. This typically consists of mirrors that are silvered and two image screens. One image is seen directly through the angled mirror whilst the other is seen as a reflection. Filters are polarized and attached to the screens, while angled filters are worn as 3D glasses. Another way of creating the image is to use an inverted image in the upper portion of a single screen, and viewing it through a partial reflector that is horizontal, with the upright image viewed below, with polarizer to match. Polarizing techniques involve using cathode ray technology, while polarizer’s are used within LCD screens for pixel control-this can interfere with these processes.
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In 2004 Kiego Iizuka uncovered a cost effective method of using this principle on laptop computer displays using cellophane sheets.

Polarized stereoscopic pictures have existed since 1936, Edwin H… It was first introduced to motion pictures by Land. Through the timespan of 1955 to 1995, this so called “3D Movie Craze” was for the most part offered in its entirety to theatres utilizing the polarizing projection glasses. Only a small percentage of all 3D films shown then used the anaglyph color filter method. Digital projection is a new technique ,along with the use of very reliable sophisticated IMAX 70 mm film projectors. Using varying forms of polarization, a completely new chronicle of 3D animation films are now beginning to reveal themselves to theaters. Polarization is not easily applied to home 3-D broadcast or DVD presentation. NBC and the Discovery Channel are beginning to show some of the new HD programming, but it can only be watched through anaglyph lenses.