We have analyzed the functioning of the human eye and the first 3D film techniques using colored glasses. Today we will talk about the current technology available in movie theaters, how this technology is applied to televisions in our homes and how new systems that promise 3D vision without using any glasses work.
As we have seen, a 3D movie is based on the projection of two slightly different images that have been shot from two different angles. Back in 1838, Sir Charles Wheatstone invented the stereoscope. A simple but fabulous system that allows us to observe from a particular location, special cards that were perceived by our brain as a stereoscopic image.