Flying-spot scanner

Flying spot scanner were used in (color) television studio for scanning slides, Epivorlagen ( Overhead ), films, and ( in the early days of television technology ) of people.

At the beginning of the history of television broadcasting, there was announcement studios where was the spokeswoman together with photocells in a darkened cabin and was scanned by a light beam. As a light source with a lamp produced and decomposed by Nipkow disk and white image could serve, which was projected by means of optics to the spokeswoman.

With the transition to electronic image decomposition, the white image of a Braun tube was written, called the sampling tube. In contrast to the conventional picture tubes in which to reduce the flicker a noteworthy persistence is sought Abtaströhren have the minimum possible persistence. An electronic still Nachleuchtkorrektur must be done to compensate for a drag flags. The task of the light reflected by a slide or a movie or passing of a Epivorlage and to collect scattered light could be solved with an integrating sphere. In the case of the ink transfer had the integrating sphere and the task of distributing the light on three SEV ( secondary electron multiplier ) with color filters in front thereof. The term white image refers to the shape of the tube which drives television signal; the color of the written by the scanning tube image was not necessarily a pure white ( reference white ).

The application of the principle of the light spot scanning the color television studio has the advantage that this technique is free from convergence errors which occur in Kameraabtastern with a beam splitter. From the TV GmbH existed in the 1960s, the Filmabtasteranlage FC35LP49B ( Flying Spot, 35mm ). The light spot scanning is also still used today in Rank- Cintel - film scanners.