Old-school 3-D projection technology was a headache, literally, for both theater owners and for many viewers. And we've come a long way since the early days. That's ultimately how 3-D theater technology works. That is, one lens blocks certain light waves and the other blocks a different set of light waves. At the right angle, the glasses will block much of the glare and make the scene easier on your eyes.Įngineers can make eyeglasses with lenses polarized differently for each eye. This is readily apparent if you take a pair of polarized sunglasses and rotate them while looking at a bright surface with a lot of shiny, reflected light. That means directors can purposely design 3-D effects for every aspect of their movies and project them in a way that makes sense to your eyes. The glasses you wear are polarized filters, and the lens for each eye is calibrated to let in light waves that strike the lens at a specific angle. Those images then strike the movie screen and bounce back to your glasses. This computer sends the data in two parallel streams to the projector, which displays them, quickly alternating between images meant for your left and right eyes. One camera captures images ultimately intended for your left eye the other, for your right.Īfter the movie is sent to your local theater, projectionists load the data into a server. That's why directors use dual-mounted cameras to film 3-D scenes. Because your eyes are about two inches apart, their perspectives are just a little different. You have two eyes that let you see the world in stereo. Of course, the 3-D system really all begins with the movie set.
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