What are 3D glasses
We all have had a date with 3D glasses way back in the days of our innocent childhood, though the carnivals they formed a part of did not quite warrant a scholarly insight into the whole matter of 3D viewing. This, however, is the age of knowledge, and every new technology brings with itself a body of knowledge. We know 3D glasses today as a vital component of the 3D TV experience. These glasses have to be worn while watching 3D content on the television. Thus the 3D glasses work like additive clampers which eventually create a 3D image on the eyes.

As with all technologies, the advent of times have led to massive makeovers to the outlook of 3D glasses, but as stated earlier, there is a pretty archaic foundation to its working. The basic premise upon which the modern 3D glasses work is the same as the one upon which the rather primitive anaglyphic glasses worked. The anaglyphic 3D frame has a red and a blue lens. These lenses separated the two primary components from the image and projected them separately; one on the left eye and the other on the right eye. In this way, the illusion of the dimension of depth to the image was created. Anaglyphic glasses fall in the passive 3D lenses category, and are emulated in some sorts by the passive polarized lenses, which differ only in the sense that they filter waves of light rather than its colors. The Pulfrich glasses use an intelligent trick to create the 3D effect. These glasses have a transparent lens that relays an object moving across the plane of vision and a tinted lens that does the same function, but adds a slight delay to the transmission. The cumulative effect of this exercise is that the mind is tricked into believing that the images have depth to them. Active glasses, the more popular breed of 3D glasses, connect wirelessly to the screen in front and enhance the 3D imaging manifolds. Active glasses are suitable for the modern 3D televisions which can produce and transmit images at an unbelievably fast rate. The glasses are specially designed to cater to such swift serves from the television.
The most popular type, called the active shutter 3D glass pair, shutters at the rate of knots between the two eyes. It uses infrared signals from the serving television to activate the filters and projects different image streams on the left and the right eye. In this way, the two eyes see slightly skewed images, and the brain is coaxed into perceiving the combination as one with a 3D touch to it. Active glasses make the 3D movie experience complete. Many modern 3D TV manufacturers try to lure customers by offering their own 3D glasses with the television set. Also, these glasses are available easily in the electronics market, both as a part of a package as well as a separate entity.