To watch a movie in 3d format, it is not necessary to visit cinemas, you can use TVs that support the corresponding function. There are several 3d technologies that make it possible to form a three-dimensional image on a TV.
Instructions
Step 1
Passive technology is used to show 3d films in the overwhelming majority of cinemas. A similar technology can be used in televisions. To form an image, each frame of the film is split into two pictures, one for each viewer's eye. The first of them has vertical polarization, the second is horizontal. To view the final image, special glasses are used, the same as in cinemas. The lenses of these glasses are polarized for viewing a specific picture. At the same time, each eye sees its own version of the film frame, due to which the effect of a stereo image is achieved. Passive 3d glasses are easy to use and do not require additional power supplies, which makes them readily available and inexpensive.
Step 2
The technology behind active 3d TVs is more advanced. To form a 3d picture using this technology, the image on the TV screen is alternately shown to each eye. At the same time, the switching frequency is very high, it does not create flicker and is invisible to the eye. To see such a picture, you need special, active 3d glasses with their own power supply. The lenses of these glasses have a special layer of liquid crystals, which are used as shutters, making the lenses either transparent or non-transparent. Active 3d glasses are synchronized with the TV and during their work show each eye a certain frame at a certain moment. The picture quality when using this technology is noticeably higher than that of passive TVs.
Step 3
Glasses may not be used to view 3d images. Autostereoscopic 3d technology does not require the viewer to use additional devices and is capable of directly displaying a three-dimensional image. This technology has not become widespread, but according to experts, it is the future of 3d television. Autostereoscopy is based on the barrier parallax method. For the formation of a 3d image, a special material is used on the TV screen. It has a large number of slits that display different images for the left and right eyes. This technology seems ideal, but it has one big drawback, the viewer should only look at the TV screen at right angles, although manufacturers are still looking for ways to eliminate this limitation. Autostereoscopic 3d TVs and monitors are very expensive, making them less affordable compared to passive and active devices.
