How Do 3d Video Work?
Can someone please show me how to work these 3D glasses?
3D video
As a good example of stereoscopy, the polarized 3D glasses immediately creates the illusion of three-dimensional pictures by using filters to restrict light that normally would reach the eye. A three-dimensional moving picture is created by projecting two slightly different images together onto a single screen. The viewer wears low-cost eyeglasses which also contain a pair of orthogonal polarizing filters. As each filter only passes light which is similarly polarized and blocks the orthogonally polarized light, each eye only sees one of the images, and the effect is achieved.
How do Polarized 3D Glasses work
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. In 2003 the value was under ten thousand US dollars. For people wearing polarized glasses this is the perfect system for displaying 3d data This kind of technology is called a GeoWall, and for years Earth Sciences have been using them courtesy of the GeoWall Consortium, which offers a variety of open source or commercial options.
When stereo images are to be presented to a single user, it is practical to construct an image combiner, using partially silvered mirrors and two image screens at right angles to one another. Whilst you will be able to view one of these images as a reflection, you will be able to view the other directly through the angled mirror. Polarized filters are attached to the image screens and appropriately angled filters are worn as glasses. A similar technique used with appropriate polarizer’s is to use a single screen viewed in a horizontal partial reflector,with an upright image placed below the reflector. Cathode ray technology is most commonly used in conjunction with polarizing techniques.
In 2003 Keigo Iizuka discovered an inexpensive implementation of this principle on laptop computer displays using cellophane sheets
3-d glasses
Polarized stereoscopic pictures have been around since 1936, when Edwin H. Land pioneered in using this in cinematic productions. 1952 through 1955 was when the “3-D madness” hit most theatres ,offering patrons 3-D 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. An entirely new breed of polarized 3D animation movies are finding niche in classy theaters. Polarization is harder to achieve in the 3D Home or DVD players. NBC and the Discovery Channel are beginning to show some of the new HD programming, but it can only be watched through anaglyph lenses.
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