How Do Polarized 3D Glasses Work?

Polarized 3D glasses have been around for years making movies and trade publication jump out at its audience. Some of the most popular movies of all time have been displayed with 3D effects. 3D movies spiked in the 70s and 80s but are making a come back with audiences because newer technologies are being applied to give off more colors and a better experience. Polarized 3D glasses can give off an illusion that subjects being seen has three-dimensional qualities. This is achieved by restricting the light that is able to reach each of the viewer’s eyes. Three-dimensional pictures and movies work by putting two individual images or frames together onto one screen.

The old way of using 3D glasses was to use a procedure called complementary Color Anaglyphs. This worked by using a certain filter that would block out certain colors from each of the viewer’s eyes. The most widely used glasses will utilize red and cyan to pass red colors to one of the eyes and blue and green to the other viewer’s eyes. In the beginning, this would only work on black and white images because the filers would block out other colors. However, modern procedures will allow all colors to be viewed, but slightly muted. Other procedures that utilize this technique will use green and red filters or amber and blue filters. Although there have been significant improvements, this all still considered inferior to the polarization method.

Polarization is just another way of viewing 3D content with passive glasses. Passive polarization use lenses that can block the wavelengths of certain lights. When viewing a movie, two images are displayed after being shot from different angles. These images are shown through two different projectors to give the viewer their 3D image. Each of these images is displayed so they match up with one side of the glasses. The other image will match up with the other side of the glasses. When both of these images are put together, they give off the 3D effect. If you tilt your head, this effect is taken away because you’re breaking the angle that is needed.

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