3D Technology Without Glasses – How Does it Work?
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The 3D revolution has seriously shaken the way in which we perceive technology. We now have 3D television sets, 3D smartphones, 3D laptops, cameras, game consoles and we should expect soon enough to see on shelves, the 3D tablets as these devices seem to be on the highest wave on technology nowadays. But have you ever stopped and asked yourself – how in God’s name 3D works? Ok, that might not be too hard to answer, but glassless 3D technology? Is 3D the start of a complete new technological age?
3D Technology: From Beginning Until The Glasses-Free Period
The History of 3D Technology
You think 3D is a recent discovery? It’s actually not. People started talking and analyzing 3D technology even in the 19th century, when Sir Charles Wheatstone described the process of stereopsis: ”the mind perceives an object of three-dimensions by means of the two dissimilar pictures projected by it on the two retinae”. In plain English, this basically means that two similar overlaid images project another one, more realistic for your sense of perception.
Why did the first, “old” 3D glasses had blue and red colors? Well, because it was easy for each eye to identify those two different images and then to overlay them. Each eye would get its own “point of view”, and the red and blue colors were used to separate the pictures so that in the end you could have a 3D environment. But, if you recall, the quality wasn’t so great; I even had headaches and it had a “ghost-like” aspect.
Another solution for high-quality 3D was to use polarized glasses which could orient the light in vertical or horizontal directions. One eye image could be projected on vertical basis and another on horizontal but it would get real blurry if you decided to move your head. That’s why they had to improve it, making the 3D to work onrotational polarity, instead of vertical it would be clockwise in one eye and instead of horizontal – counterclockwise in another eye. So that’s why you can now watch your favorite movie in 3D and move at your own comfort.
3D Television, Camera and Computer Graphics
If you can afford it, you probably already have a nice 3D TV at your home and a pair of glasses to help you watch awesome 3D movies and even TV channels. Have you ever wondered how does it work? Mashableexplains it simple and in plain words:The glasses are synced up to your television and actively open and close shutters in front of your eyes, allowing only one eye to see the screen at a time. This sounds like a recipe for a stroke, but the shutters move so quickly that they’re hardly noticeable. These shutter lenses are made possible because of the refresh rate on televisions. 3D-enabled televisions have high image refresh rates, meaning the actual image on screen is quickly loaded and reloaded. Through the glasses, you receive one constant image instead of a flicker.
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