What is the principle of 3d movies?

Stereoscopic film is a film that uses the difference of visual angle and convergence function of human eyes to produce stereoscopic effect. When the film was shown, the two pictures overlapped on the screen.

Through the viewer's special glasses or the radial semi-conical lens grating in front of the screen, the viewer's left eye can see the picture taken from the left perspective, and the right eye can see the picture taken from the right perspective, which is synthesized into a stereoscopic vision image through the convergence function of both eyes.

Complementary colors, switches, cylindrical mirrors, slit gratings, etc. They are all based on the basic principle that the left eye sees the left picture and the right eye sees the right picture, and the different ways to watch three-dimensional images on the screen. With the development of science and technology, people will have more ways to see three-dimensional images on the screen.

At present, there are many imaging technologies for 3D movies, such as non-flash 3D technology, time division technology and grating technology. They all have their own advantages and disadvantages, but the final realization depends on the same principle.

Non-flash 3D technology adopts polarized 3D imaging; Time-division method divides the image into two frames by increasing the screen refresh rate, forming two groups of pictures with left and right eyes staggered continuously, and then making these two groups of pictures enter the left and right eyes respectively through special 3D glasses, and finally synthesizing 3D stereoscopic images in the brain.

Grating technology controls the direction of light propagation through grating fence, so that the left and right eyes receive different images, resulting in visual differences, and finally form a three-dimensional display effect.

Baidu Encyclopedia -3D Movie