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My question is why do 3d movies have a red and blue"double image" that is basically just a few inches to the right and left of the real image. And how does this help us see the image as "3d". Does it have anything to do with polarized light. And do you need a special computer screen to produce these images because when I use 3d glasses to loot at 3d images on google i still see the see image?

Qmechanic
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random user
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1 Answers1

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red/blue double image is the (very) old technology to see 3D on paints, drawings and ordinary screens. See 'Anaglyph' on wikipedia. It requires red/blue glasses (very cheap on Ebay :-) ).

Polarized display is expensive, and is the one requiring polarized glasses.

Fabrice NEYRET
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