3D movies are one of the main attractions for many cinemas and theme parks around the world, but in the recent years they have entered our homes with TV’s using technology that allows to project 3D and glasses that can make it work. For the most part, at-home and cinema 3D glasses utilise different technologies, with most home sets opting for the active glasses and cinemas opting for the passive ones. How about the famous Infitec 3D technology? How go their glasses work and what is the reason behind that?
Active vs passive 3D glasses
In order to discuss the marvellous Infitec 3D technology and be able to understand how do their 3D glasses work, we need to establish the standard distinction between passive and active glasses. In general, in order for a human to see a 3D image on a screen, each eye has to see slightly different images and be able to connect them into one with brain power. Active 3D glasses work by using shutters that rapidly open and close, allowing each eye to see a separate picture – it happens so fast the brain still recognises it as one, 3D image.
This type of technology is mostly used for home TV sets and projectors as the glasses used here are much more expensive and need to be charged, which wouldn’t work at the fast pace that cinemas work at. Passive 3D technology is based on much cheaper glasses for which each lens is polarized differently – on the screen, the left eye sees only the picture polarized horizontally, and the right eye – vertically. Another way would be to use separate sets of RGB and lenses that allow to see only one of them.
Infitec 3D glasses – how do they work?
Often called the Super Anaglyph glasses, the Infitec 3D glasses work similarly to the traditional passive technology. Here, for each eye, the picture is encoded with slightly different variations of red, green and blue colours. The differences are so slight and subtle that the brain would hardly notice them, but with the special glasses, they are filtered separately through each lens and thus, a different image is filtered to the intended eye. How does it compare to other technologies used in cinemas? Infitec offers glasses that are compatible with almost any technology and screen fit for the passive glasses, which means it can be used at almost any cinema of the world.