How does a 3D movie work?
If you alternately close your left and right eyes while looking at a nearby object, you'll find that each person has a slightly different worldview. Your left eye sees a little more to the left of the object and your right eye sees a little more to the right. Your brain merges the two images of her so you can see it in three dimensions. This is called stereoscopic vision.
To achieve a similar effect, 3D cinema shoots two lenses side by side like eyes (or creates a computer-generated image to recreate the same effect).
In his old-fashioned 3D movie, shooting the left eye footage with a red lens filter results in a red image, and shooting the right eye footage with a blue filter results in a blue image. Two projectors then superimposed the images onto the cinema screen. His 3D glasses with blue and red filters ensured that the viewer's left and right eyes saw the correct image. The red filter allowed only red light to pass through the left eye, and the blue filter allowed only blue light to pass through the right eye. The brain then combines these two slightly different images to create the illusion of 3D. Unfortunately, this meant that traditional 3D movies didn't take full advantage of color.
To get around this problem, his latest 3D film uses polarized light instead of red and blue light.
- What is polarization?
polarized waves oscillate at only one level. Light produced by the sun is not polarized. H. It consists of light waves that vibrate at different levels. However, it can be converted to polarized light with a polarizing filter.
Small parallel lines, like slats on blinds, are carved into the polarizing filter.
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