Free 3d Glasses - How Do 3d Glasses Work

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September 26, 2008

How Do You Create 3D Viewing with Glasses?
How Do 3D Glasses Work?
Free 3D Glasses
Most human beings come equipped with two eyes and an absolutely amazing binocular vision system. To be used with objects up to around 20 feet. 6 thru 7 meters away, the binocular vision system lets us easily tell with good accuracy how far away an object is. For example, if there are multiple objects in our field of view, we can automatically tell which ones are farther and which are nearer, and how far away they are. If you look at the world with one eye closed, you can still perceive distance, but your accuracy decreases and you have to rely on visual cues or focusing distances, both of which are slower.

To see how much of a difference the binocular vision system makes, have a friend throw you a ball and try to catch it while keeping one eye closed. You may also notice a difference at night of in a room that is fairly dark. Because of the correlation betwen the eyes and the brain it’s more difficult to catch a ball with one eye open than two.
3-D Glasses
Binoculars are designed to fit the general frame of the human face, having an average of two inches span between the lenses. Five centimeters. at a distance. So, the perspective of each eye is a little bit different and your brain’s binocular vision system calculates distance by using this difference. Even though the images that each of your eyes sees are slightly different, your brain is able to correlate them. A correlator will single out objects in two scenes and then calculate the distance of an object that is between those images. Objects that are farther apart in the two images are closer than objects that are not so far separately.

View-Master and stereoscopic viewers are examples of binocular vision systems. In a View-Master, each eye is presented with an image, and the images are created by two cameras that photograph the same image from slightly different positions. Since each eye sees only one image, your eyes know how to automatically connect these images together.