Importance

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Abstract

An apparatus is provided for the exposure of a recording carrier including alpha numeric characters or faces having a foreground pattern contrasting relative to a background pattern. In accordance with the apparatus, the alpha numeric characters or faces in front of a background pattern are exposed by an intensity modulated scanning beam along scanning lines on the recording carrier. At the character or face borders, a switch-over control logic (3) switches over a modulator switch (2) connected to a scanning beam modulator (1) on various signal sources. The signal sources comprise raster video signal sources (10). A plurality of signal sources, which at the same time are prepared, in parallel relative to each other, to generate foreground pattern signals and background pattern signals, are controlled by a preselection control logic (13) which may be adjusted to maintain a preselection control state over arbitrarily selectable scanning line sections. The preselection control logic (13) activates during the course of the scanning along each scanning line section at least one of the signal sources each which feeds foreground pattern signals to the modulator switch and at the same time at least one of the signal sources each, which feeds background pattern signals into modulator switch (2).

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First Claim