Indie Birds – Developing The Techniques Behind Your Favorite 3D Film
The 3D film market has increased quite a bit in the past few years, and what was once a rare specialty is now commonly seen in many theaters. Although the concept of 3D films has been around since the 1950’s, it was not until very recently that technology has truly come up with the imagination of film makers and producers who try to create a visually immersing world for their audiences. Thanks to special equipment and film making techniques, directors and producers can make their dream for a 3D film into reality and create a totally three dimensional experience for their audiences.
The basic concept behind creating a 3D film is recording the images the same way your eyes see them, using information collected from both the left and right eye to create one image; this is called stereoscopic vision. The cameras used to record 3D movies are made with two lenses which sit next to one another much like your eyes. Computer programs let animators produce the same effect even though there is no live action footage in a movie. A 3D film is actually projected from two projectors at the same time; each one sends the film recorded by one of the two dual camera lenses.
You have likely seen an old style 3D film which uses special red and blue 3D glasses to produce the three dimensional depth effect. These glasses work because the two images fused to create a stereoscopic film were sent through a red light filter and a blue light filter, which can combine when you wear the 3D glasses. Although this created the right optical illusion, having to use red and blue light limited the colors that could be used in the films.
Vibrating light waves moving on one plane, called polarized light, is how we watch 3D movies today. While you only see one image, there are actually two projectors sending out one vertically and one horizontally polarized image during the 3D film. The 3D glasses the audience wears have different filters over each eye so that only one type of light wave can enter each eye. This basically serves as an optical illusion and tricks your brain into seeing two separate images together as one, creating the depth and realism that audiences have come to love in 3D movies.