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| How Do 3D Glasses Work? |
How do 3D Glasses work?
To begin, it helps to understand what you’re watching. A 3D image
is one that has two different perspectives of an equivalent image superimposed
on one another. This is often what's referred to as an anaglyphic image. By
using 3D anaglyphic glasses, each eye filters chromatically opposite colors
(typically red and cyan) to make a 3D eye-popping picture. That’s why 3D
glasses have two different colored lenses. But 3D anaglyphic glasses aren’t
entirely to credit – it’s your brain that’s doing most of the work!
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Have you ever closed one eye while rummaging through a pair of
binoculars? By closing one eye you'll see a slightly-shifted perspective than
if you had both eyes open. Each eye sees two different images, but because your
eyes are only set about two inches apart, they’re still close enough that the
pictures seem to “merge” into one. This permits you to gauge distances and
grants you proper depth perception towards your surroundings. It’s an
equivalent process with 3D glasses.
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When you check out a 3D image through 3D glasses, your brain is
employing a technique called stereoscopy to make the illusion of depth.
Remember how two images from two different perspectives formed one anaglyphic
image? Your brain takes these two separate images and processes them in order
that the image appears to “pop” out. 3D glasses merely recreate what your own
eyes do on a daily basis! It’s almost like you’re tricking your own brain!
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