Polarized 3d Glasses - What Is The Science Behind Them?
How do 3D glasses that are polarized work?
Polarized 3D glasses create the illusion of three-dimensional images by restricting the light that reaches each eye, an example of stereoscopy. Two images are eventually projected onto the same theatre screen, superimposed to present a specific film. The viewer wears low-cost eyeglasses which also contain a pair of orthogonal polarizing filters. 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.
Polarized 3D Glasses
The problem is that polarized light becomes slightly less polarized once it reflects from a movie screen. If an aluminized or silver screen is used, the situation can be resolved. A comparatively low cost can be achieved by means of a pair of aligned DLP projectors and accessories. A computer with a dual-headed graphics card is necessary. (under US$10 000 in 2003) technology that lets groups of people see three-dimensional images if they are wearing polarized glasses There is a system now available, called a GeoWall that has helped the Earth Sciences field immensely.
3D Glasses
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. While one image is viewed through the precisely angled mirror, the other is merely a reflection. Correctly adjusted glasses are equipped and filters, properly polarized, are attached to the image screens. There is another, similar system that projects on one screen with the topmost image inverted and viewed in a partly reflective horizontal surface and the lower image shown right-side up. Cathode ray technology is most commonly used in conjunction with polarizing techniques.
Polarized 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. it was first applied 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 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. Polarization is used in some way in all of the new generation of 3D animated movies. Polarization is not easily applied to home 3-D broadcast or DVD presentation. It seems that at this point, only anaglyph glasses can be used to view the new shows of High Definition TV. This in turn, is beginning to be aired often by well known channels and stations.
from B2B News


Posted October 27, 2008
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