Let me ride you through a brief explanation to how do the 3D movies work, this also goes to Individual movie lovers, If you take a look at an object closer to you and close your left and right eyes in turn, you’ll notice that each has a slightly different view of the world. Your left eye sees a bit more of the left side of the object, and your right eye sees a bit more of its right side. Your brain combine the two images together allowing you to see in three dimensions. This is known as stereoscopic vision.
To create a similar effect, 3D films are captured using two lenses placed side by side, just like your eyes (or by producing computer generated images to replicate the same effect).
In old fashioned 3D movies, footage for the left eye would be filmed using a red lens filter, producing a red image, and footage for the right eye would be shot using a blue filter, resulting in a blue image. Two projectors then superimposed the images on the cinema screen.
3D glasses with blue and red filters ensured viewers’ left and right eyes saw the correct image: the red filter would only let red light through to your left eye, and the blue filter would only let blue light through to your right eye. Your brain would then combine these two slightly different images to create the illusion of 3D. Unfortunately, this meant that old fashioned 3D films couldn’t make full use of color as compared to the new 3D fashioned films.
To get around this problem, modern 3D films use polarized light instead of red and blue light.
What is polarized light?
A polarized light wave vibrates on only one plane. The light produced by the sun is unpolarized, meaning it is made up of light waves vibrating on many different planes. It can however be transformed into polarized light using a polarizing filter.
A polarizing filter has tiny parallel lines etched into it, a bit like the slats on a set of venetian blinds. This means it will only let light vibrating on a particular plane through.
As with old fashioned 3D, the film is recorded using two camera lenses sat side by side. But in the cinema, the two reels of films are projected through different polarized filters. So images destined for viewers’ left eyes are polarized on a horizontal plane, whereas images destined for their right eyes are polarized on a vertical plane.
3D glasses use the same polarizing filters to separate out the two images again, giving each eye to see a slightly different perspective and fooling the brain.
Animators also uses the same approach in making 3D movies. 3D animation film is created in rendering three dimensional objects on a two dimensional surfaces. these objects generated by a computer is displayed on a two dimensional screen and in other way round they mimic the principle of 3D world, just that they appear to move, rotate and turn in some angles. You will normally see it in televisions, video games and film-making