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How does 3D television work?

Updated: 8/18/2019
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A TV showing 3D content displays two separate images of the same scene simultaneously, one intended for the viewer's right eye and one for the left eye. The two full-size images occupy the entire screen and appear intermixed with one another - objects in one image are often repeated or skewed slightly to the left (or right) of corresponding objects in the other - when viewed without the aid of special 3D glasses. When viewers don the glasses, they perceive these two images as a single 3D image, a process known as "fusing."

The system relies on a phenomenon of visual perception called stereopsis. The eyes of an adult human lie about 2.5 inches apart, which lets each eye see objects from slightly different angles. The two images on a 3D TV screen present objects from two slightly different angles as well, and when those images combine in the viewer's mind with the aid of the glasses, the illusion of depth is created.
It's the same as the 3d you experience on movie theaters. The light comes out as a polarized one. One polaroid in your glasses lets pass 1 type of light while the other part is passed by the other one. So you get two perspective of the same image which is kind of like real life. In real life your eyes see the same object in different perspective which then your brain merges to make a 3D picture.

The other method is the glasses(electronic ones) lets one image display at one eye and then after a fraction of a second the same image is displayed in the other eye. So your brain is forced to perceive the two images as the same image even though they are displayed after a certain delay.

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Q: How does 3D television work?
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