Cinema technology
The cinema technology describes the field of Performance cinematic representations to scientific, business or social purposes. The focus is on commercial business operations based on the film . Increasingly, it is also about showmanship with video and computer technology.
The technical prerequisite for a “cinema” is a place where visitors from public space can come to see moving images. In its best-known configuration, this is a closed room, a hall, with an adjoining projection room , from which the first is projected. Visitors find seating in the dark with a view of a so-called screen . The main themes of cinema technology are found in the geometric conditions of the auditorium, the screen surface, the projection distance, the angle between the center vertical of the screen and the optical axis.
But also transportable cinema technology (such as the Zeiss TK 35 ) found its place. So-called country films were shown at fixed times in the GDR, similar to mobile libraries.
One or more projectors are used to process programs. With film and slide projectors, classic cinema technology has been developed since 1890, which can be briefly outlined as follows: Auditorium with 400 seats, projection distance 30 meters, screen 3 by 4 meters, two normal film projectors, a cine and slide projector, reproduction of light sound From a film copy, amplifier, loudspeaker behind the screen, a maximum of four performances per day. This was the state of the art from 1928 to around 1958. Between 1908 and 1928, the time of cinema technology with 1000 images per minute lies, from the 1950s onwards a large number of wide-screen and multi-channel sound processes , such as CINERAMA , emerged as a reaction to the spreading television , CinemaScope , VistaVision , Todd-AO , Perspecta or Sensurround .
The operation is controlled from the demonstration room, where brightness, sharpness and volume are also regulated. Sometimes this happens from the auditorium. The corresponding technical facilities are used by the projectionist . This includes the fuses and circuit breakers of the power supply, accumulators and charger (s) of the emergency power system and possibly the optical sound scanner, all projectors, any cooling devices of the same; Handling, storage and manipulation of films and slides or data and calculation rules, record player, tape recorder, cinema gong, microphone, lighting and air conditioning.
The best cinema technology is that which the visitor does not notice. The paying audience should get the perfect illusion of what is happening. To this end, traditional stage technology and theater effects are used for distraction, depending on the requirements of the company management: curtains, lights and sound events. Nothing is more disappointing than a creaking curtain in the silence.
literature
- Curt Wesse: great power film. The creature of art and technology . Berlin, 1928
- Kintop, Early Film Research Yearbook, No. 5: Performance Stories. Strœmfeld-Roter Stern, Basel and Frankfurt am Main, 1996