A 65mm or 35mm camera with a fisheye lens is used for shooting, and a 70mm projector with a fisheye lens is generally used for screening. There is a cinema dedicated to the film. The shape of the screen is half a round dome. The diameter of the dome is 25 meters and the height is about 18 meters. It extends all the way to the back of the auditorium, as if half a huge ball cover is on the ground. . The audience enters the "ball" through a dedicated tunnel to watch movies. On this strange screen, there have been films about interplanetary navigation and the Apollo spacecraft landing on the moon. The effect is particularly good. There are several curtain theaters in China, the most representative of which is the curtain hall of the China Science and Technology Museum in Beijing. The hall was built in August 1995. The screen is 27 meters in diameter and has 500 seats. The film that has been shown is the 70mm film "Grand Canyon" and "Flying to Space".
The fisheye lens that is required for the filming and screening of this film is a special lens with a particularly wide viewing angle. It is constructed and functions like a fish's eyes. In our human eyes, when we don't turn our heads or turn our eyes, we use only one eye, and the clear range seen from left to right is about 50°. The eyes of fish can be seen much wider than our humans, reaching 180°. Therefore, people call the lens with a particularly wide angle of view a fisheye lens.
Curtain film has become an ideal tool for scientific research and scientific popularization, especially in the scientific fields of space, ocean, military, atmospheric physics, etc., and it can exert its remarkable superiority.
In the curtain cinema, the seats are generally designed in the form of a recliner, so that the viewer can look at the dome without difficulty and can watch it very comfortably.
Curtain film is a new form of film that has developed in the past 20 years. The high-definition super-large picture is beyond the viewer's field of vision. The audience is like being in the scene, plus a full-scale six-channel stereo dubbing, which has a very real presence effect.
The size of the 穹 screen directly affects the capacity of the audience in the hall. Built in the China Science and Technology Museum, the curtain movie hall has a screen diameter of 27 meters, the entire screen area is nearly 1000 square meters, and the movie screen can reach 860 square meters. It can accommodate 500 people. It is the largest of its kind in the world today. One. Curtain film has become a wonderful work of contemporary film technology with super-human eye view and realistic stereo effect. Only a few countries in North America, Western Europe and Asia have built curtain theaters.
