3d Cinema and how It Works
3D movies and television shows have become a popular trend these days, but how does the
technology actually work?
3d technology is based on the fact that humans have biopic vision. This means that they use two eyes to see the world around them. The eyes on a person's head are separated by a small distances, meaning that each eye sees the world in a slightly different way. Light enters each eye and is converted into nerve signals by the retina, which sends the nerve impulses to the brain where they are processed. The difference in the information that each eye sees creates what the brain perceives as depth, the third dimension.
Modern 3d movies rely on this biological concept. When the movie is filmed, two cameras are used to capture the images. These cameras are oriented in such a way that they approximate the distance between two human eyes, which captures what each eye would see. When the film is completed and edited, there are two film reels that contain the movie. At the cinema house, these two film reels are combined using two projectors. One projects what the right eye would see and the other shows what the left eye would see.
Viewers of these 3D movies need to wear special glasses to watch the movie and view the 3d effects. These movies require viewers to wear special glasses that have lenses that can polarize light. Visible light travels in all different kinds of directions called orientations. A polarizing lens has the ability to change the direction of the light that passes through it, effectively blocking out all of the light that is traveling in planes that are oriented at different angles than that of the polarizing lens.
When a person wears polarized glasses, one lens will only let in light that is moving horizontally, while the other only lets in light that is traveling vertically. Each of the two movie projectors is designed to emit light that is traveling only horizontally or only vertically. The projectors alternate showing frames of film at a speed that is imperceptible to the brain, which combines the two images into one to create a three dimensional image.
Another type of polarized 3D glasses is used at homes for televisions and computers. These are called LCD shutter glasses and work by alternately dimming each lens. These can produce a flickering effect and are inferior to the other technology because both frames are not being shown at once on the television screen.
3d technology is based on the fact that humans have biopic vision. This means that they use two eyes to see the world around them. The eyes on a person's head are separated by a small distances, meaning that each eye sees the world in a slightly different way. Light enters each eye and is converted into nerve signals by the retina, which sends the nerve impulses to the brain where they are processed. The difference in the information that each eye sees creates what the brain perceives as depth, the third dimension.
Modern 3d movies rely on this biological concept. When the movie is filmed, two cameras are used to capture the images. These cameras are oriented in such a way that they approximate the distance between two human eyes, which captures what each eye would see. When the film is completed and edited, there are two film reels that contain the movie. At the cinema house, these two film reels are combined using two projectors. One projects what the right eye would see and the other shows what the left eye would see.
Viewers of these 3D movies need to wear special glasses to watch the movie and view the 3d effects. These movies require viewers to wear special glasses that have lenses that can polarize light. Visible light travels in all different kinds of directions called orientations. A polarizing lens has the ability to change the direction of the light that passes through it, effectively blocking out all of the light that is traveling in planes that are oriented at different angles than that of the polarizing lens.
When a person wears polarized glasses, one lens will only let in light that is moving horizontally, while the other only lets in light that is traveling vertically. Each of the two movie projectors is designed to emit light that is traveling only horizontally or only vertically. The projectors alternate showing frames of film at a speed that is imperceptible to the brain, which combines the two images into one to create a three dimensional image.
Another type of polarized 3D glasses is used at homes for televisions and computers. These are called LCD shutter glasses and work by alternately dimming each lens. These can produce a flickering effect and are inferior to the other technology because both frames are not being shown at once on the television screen.