How Does 3D Works?

3D is based on the principle of stereoscopy, which creates the illusion of depth in an image. The easiest way to enhance depth perception in the brain is to provide the eyes of the viewer with two different images, representing two perspectives of the same object, with a minor deviation exactly equal to the perspectives that both eyes naturally receive in binocular vision.

There are currently three kinds of 3D technology on the market and each one works differently:

1) Anaglyph technology, is the most famous one (think red/blue paper glasses) but usually the 3D effects are not so great.

2) Polarized (or passive) technology, is the technology you have been exposed to when watching a 3D movie in an IMAX theater (e.g. Avatar 3D, Alice in Wonderland 3D, etc.)

3) Active technology, is the most recent one that is quickly becoming the standard in terms of 3D watching at home.