3-D Movies

In order to produce stereoscopic moving pictures, two separate images
are projected onto the same screen using orthogonal polarizing filters. It is best to use a silver screen to preserve the polarization. The viewer wears inexpensive eyeglasses containing orthogonal polarizing filters. As each filter only passes light that is polarized the same way, the 3D effect is maintained. Tilting of the head causes the images to bleed over to the opposite channel so most viewers learn not to tilt their head.

Several individuals can view this type of stereoscopic image at the same time.

There are several commercial systems offering products like this and one can put a system like this together using kits and instructions.

To present a stereoscopic motion picture, circular polarizing filters of opposite handedness are used. The viewers wear low cost eyeglasses containing analyzing filters of opposite handedness. Light that is left-circularly polarized is extinguished by the right-handed analyzer and vice versa. The result is similar to the stereoscopic viewing using linear polarized glasses except that the viewer can tilt one’s head and still maintain the image.

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