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How Do 3d Glasses Work?

How do 3D glasses that are polarized work?
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. To present a stereoscopic motion picture, two images are projected superimposed onto the same screen through orthogonal polarizing filters. With a pair of orthogonal polarizing filters, the viewer can afford these eyeglasses due to its low cost and high quality. Similar to the method of diffusion, the effect is achieved by filters passing through a light that is specifically polarized to block the orthogonally polarized illumination, giving the viewer’s eyes to only see one of the images.
3dglasses
The difficulty arises because light reflected from a motion picture screen tends to lose a bit of its polarization. However, this problem is eliminated if a ’silver’ or Aluminized screen is used. 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 There is a system now available, called a GeoWall that has helped the Earth Sciences field immensely.
How do Polarized 3D Glasses work
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. One pair of filters is integrated into the screen, and the viewer wears another pair like glasses. A similar technique uses a single screen with an inverted upper image, viewed in a horizontal partial reflector, with an upright image presented below the reflector, again with appropriate polarizer’s. Cathode ray screens are best suited to polarizing glasses, since LCD screens contain polarizers to control the presentation of pixels, and the polarization can conflict.
3D Glasses
Keigo Iizuka Discovered a cheaper form of this by using a laptop computer using cellophane sheets,actual 3D pictures have been around since 1936 when Edwin H. Land first applied it to motion pictures. Polarizing projection and glasses were most widely used during the early part of the nineteen fifties when they were used to watch three dimensional films in movie theatres. Only a minute amount of the total 3D films shown in the period used the anaglyph color filter method. What is new is the use of digital projection, and also the use of sophisticated IMAX 70mm film projectors, with very reliable mechanisms. Using varying forms of polarization, a completely new chronicle of 3D animation films are now beginning to reveal themselves to theaters. Polarization doesn’t work as well with home presentations, whether broadcast or on DVD. At this point only anaglyph glasses may be used to view the new HD shows and are beginning to be aired occasionally by NBC and the Discovery Channel.

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