Intermediate film process
The inter-film process was a technique for the quasi- live broadcast of television programs . The recordings were recorded on special film, developed immediately after the recording, and then electronically scanned and sent. The intermediate film process was still used during the 1936 Olympic Games .
In practice, the film camera was mounted on the roof of a truck and exposed the black and white film . The exposed film was not wound up in the camera, but immediately transported through a light-tight shaft into the interior of the truck, which was set up as a darkroom . There the film was developed, dried only poorly and immediately put into a scanning device. In this way, it was possible for the Reichspost to transmit television images from the 1936 Summer Olympics with a time lag of around one to two minutes.
This cumbersome process was necessary because, due to the lack of sufficiently sensitive image pickup tubes, there were no electronic television cameras that could generate a broadcast signal. The interim film process, based on an idea by Georg Oskar Schubert , was developed to operational readiness by the television company by 1934 ; when powerful iconoscope tubes were available in 1937 , it was already obsolete again.
In the autumn of 1935 the first “large-screen location” opened in Berlin, which exposed the signal from the television station Paul Nipkow to a film in live operation, continuously developed it and then projected it onto a larger screen.
literature
- Heide Riedel: The development of the intermediate film process . In: Joachim ‑ Felix Leonhard (Hrsg.): Medienwissenschaft. A manual for the development of media and forms of communication . de Gruyter, Berlin 2002, p. 2140-2143 .
Web links
Individual evidence
- ↑ Norbert Bolewski: Live plus 85 s: The era of the intermediate film devices (01.15). Television and Cinema Society e. V., accessed December 9, 2019 .