How is this film shown? Thank you for your questions.

Film is an important invention in human history, which depends on the knowledge and principles of photographic chemistry, optics, mechanics, electronics and other disciplines. The most important principle of film is "visual persistence". Scientific experiments show that after a certain visual image disappears, the human eye can still keep the image on the retina for about 0. 1-0.4 seconds. When the film rotates at a constant speed of 24 frames per second, a series of still pictures will produce continuous visual impression due to visual persistence, thus producing realistic motion. Film is an important invention in human history, which depends on the knowledge and principles of photographic chemistry, optics, mechanics, electronics and other disciplines. The most important principle of film is "visual persistence". Scientific experiments show that after a certain visual image disappears, the human eye can still keep the image on the retina for about 0. 1-0.4 seconds. When the film rotates at a constant speed of 24 frames per second, a series of still pictures will produce continuous visual impression due to visual persistence, thus producing realistic motion. Film is an important invention in human history, which depends on the knowledge and principles of photographic chemistry, optics, mechanics, electronics and other disciplines. The most important principle of film is "visual persistence". Scientific experiments show that after a certain visual image disappears, the human eye can still keep the image on the retina for about 0. 1-0.4 seconds. When the film rotates at a constant speed of 24 frames per second, a series of still pictures will produce continuous visual impression due to visual persistence, thus producing realistic motion. 1895, French brothers Auguste Lumière and Louis Lumiere developed a movable film machine based on Edison's film mirror and their own continuous camera. Their film machine consists of a black box, which is equipped with a traction mechanism and a shading rotation mechanism for intermittent movement of 35 mm perforated film, and is equipped with a photographic lens and a projection lens. With a camera lens, you can take pictures at the frequency of 12 frames per second and get the negative. Take off the camera lens, stick the exposed negative film with another unexposed film, and turn it into a positive film after exposure. During the screening, the positive film is loaded into the machine. After the light bulb is lit, the light beam passes through the film and the lens, and the still picture passes through the film window at a very short interval at high speed, so that the image lingers on the retina of the viewer, and the viewer can see a group of moving pictures. However, now that there are digital cinemas in China, there is no need to develop a large number of films. They are stored in the computer/server, and the films played by them as digital projectors are guaranteed by digital transmission technology, so that there will be no quality loss in the whole film transmission process, and the audience can see the films that are "exactly the same" as the film directors. In other words, once the digital movie signal is sent out, no matter how many digital cinemas there are on the earth, the same program can be shown at the same time. At the same time, digital projection equipment can also provide value-added services for cinemas, such as real-time broadcast of major sports competitions, cultural performances, distance education and so on. , changed the single mode of cinema screening, such as Shanghai IMAX stereoscopic giant screen cinema, which is one of the most advanced cinemas in the world and the largest stereoscopic giant screen cinema in China. The three-dimensional giant screen cinema has a huge screen, with a height of18.3m and a width of 24.3m (equivalent to the height of six floors), which can accommodate 44 1 person. The projection equipment of the stereoscopic giant screen cinema adopts the 70mm 15 perforated IMAX dual-machine projection system with the highest technical content and the largest picture in the world. When showing a three-dimensional movie, two projectors show images at the same time. When the audience wears special stereoscopic glasses, the image has a strong stereoscopic effect through the polarization principle of light, just like the scene is in front of them, and it is within reach. The 6-storey huge picture and 6+ 1 channel sound system shocked the audience.

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