The ability to see in three dimensions or perceive depth lies in the brain's ability to decode the two slightly different projections of the world onto the retinas of the eyes. There are several terms to describe the differences between the two retinal images, which comes about from the eye's different positions in the head, such as retinal disparity, horizontal disparity and binocular disparity. The process of anaglyph makes use of two different colored glasses to filter the different images to the correct eye and produce a 3D effect.
The Anaglyph Image
The history of the 3D movie is a long one and the first confirmed commercial 3-D film shown in a theater was “The Power of Love” which premiered at the Ambassador Hotel in Los Angeles on September 27, 1922 (Zone). This system used a dual-strip projection system in a red/green anaglyph format. But the idea of stereoscopic movies goes back much further. In the 1890s, British film poineer William Friese-Greene filed a patent for a 3-D movie process. In this patent, two films are projected side by side on screen and the viewer looked through a stereoscope the see the 3-D effect. As this system was complex it never found practical use in movie theaters.
Anaglyph is one of several systems used to bring the illusion of depth to movies and historically, it is the earliest method used. As a result, it is also the most commonly associated form of spectroscopy by the public at large and can be seen in other media besides movies. The popularity of anaglyph comes from the ease of use and exhibition.
- Consumer Science Lesson Plans
- Game Scientific
- Women In Science And Math Statistics
- Alabama High School Graduation Exam Science
- Science To Kids
Find information and videos on many science and nature topics including space, dinosaurs and more on Yahoo! Kids Science.

