What are 3D, 4D and IMAX?

I think what the landlord wants to ask is the knowledge about movies.

D is the prefix of English Dimension, and 3D refers to three-dimensional space. Internationally, 3D movies are used to represent stereoscopic movies.

people's vision can distinguish between distance and distance because of the difference between two eyes. People's eyes are about 5 cm apart, and they will not have the same angle when they look at anything except aiming straight ahead. Although the gap is very small, it is transmitted to the brain through the retina, and the brain uses this tiny gap to produce the depth of far and near, thus producing a three-dimensional sense. Although one eye can see objects, it is not easy to tell the distance between them. According to this principle, if the same scene is made into two images with the difference of the visual angles of two eyes, and then the two eyes can see their own images one on each side, the depth of field can be stereoscopic through the retina. All kinds of three-dimensional demonstration technologies also use this principle, which we call "polarization principle".

there are many forms of making p>3D movies, among which the polarized glasses method is widely used. It uses human eyes to observe the scenery, and uses two parallel movie cameras to represent people's left and right eyes respectively, and simultaneously shoots two movie pictures with slight horizontal parallax. During screening, two films are respectively loaded into the left and right film projectors, and polarizers with two polarization axes at 9 degrees are respectively installed in front of the projection lens. The two projectors need to run synchronously, and at the same time project the picture on the metal screen to form a double image of the left image and the right image. When the audience wears special polarized glasses, the polarization axes of the left and right polarizers are perpendicular to each other and consistent with those in front of the projection lens; The left eye of the audience can only see the left image and the right eye can only see the right image. The left and right images are superimposed on the retina through the binocular convergence function, and the brain nerve produces a three-dimensional visual effect. Show a continuous three-dimensional picture, so that the audience feels that the scenery is coming, or entering the deep recess of the screen, which can produce a strong sense of "being there".

4D people introduce special effects such as vibration, falling, blowing, spraying water and scratching into the 3D cinema, and also carefully design effects such as smoke, rain, photoelectricity, bubbles, smells, scenery and character performances according to the plot of the film, forming a unique performance form, which is the very popular 4D cinema today.

Because the movie plot in the 4D cinema is developed with various special effects, the audience can get all-round feelings such as vision, hearing, touch and smell when watching 4D movies.

IMAX (the abbreviation of Image Maximum, which means "maximum image") is a film projection system that can show larger and higher resolution than traditional film. The whole system includes film copy, projector, sound system, screen, etc. shot in IMAX specifications. The standard IMAX screen is 22 meters wide and 16 meters high, but it can be played on a larger screen, and so far there are more IMAX screens.

IMAX3D is the projection technology of IMAX stereoscopic films. IMAX3D uses two sets of IMAX-specific 15/7 films, one for each eye, and provides two separate images through polarized filter glasses or infrared synchronization system combined with electronic glasses. Combined with IMAX giant screen, IMAX3D can produce realistic full-field stereoscopic effect.

IMAX 3D: make you watch more, listen more and feel more.