how do 3D movies work, and why are the glasses 2 colors?
In: Technology
Stare out your window. Cover up one eye, then the other eye, back and forth. Notice how when you switch eyes, the far away objects barely change, but the ones close to your eye jump around a lot? That’s called parallax! When you have both eyes open, your brain can figure out how far away stuff is by subconsciously comparing the differences between what your left eye and right eye are reporting.
To make a 3D movie, we need to TRICK your brain into thinking that it’s seeing parallax, when really we’re just using a flat screen like a normal movie. There’s a few different ways to do that trick. The one with the 2-colored glasses works by making your left eye and right eye each see different parts of the movie. If you take off the glasses, the screen will look blurry, but it’s blurry in a very peculiar way. Everything will look like it’s bleeding red color to the left and bleeding blue color to the right (or vice versa). The more that the colors bleed away from the center, the more difference that your eyes will detect when you put the glasses back on — and your brain will be tricked into thinking that the differences it’s seeing are real parallax.
Latest Answers