Abstract: Apparatus and method for producing qualitatively high-grade color images of originals such as copy masters for multi-color or process printing by exposing chromatic material wherein the originals are scanned point-by-point and line-by-line and the color signals thus obtained are converted into color density values for the chromatic material by means of a correction of color and of gradation. The drive values for a color exposure unit which exposes the chromatic material point-wise and line-wise are generated from the color density values using a linearization process. As a result of signal inversion color positive originals can be recorded as color negatives and vice versa. The exposure process can be matched to every chromatic material independently of the nature of the original to be reproduced and the state of the developing process by means of changing the color density values according to an arbitrarily selectable correction function and by means of signal inversion.

Abstract: Method and apparatus for recording color pictures wherein color proofs are made before the actual printing for quality control in multicolor printing processes. The color pictures are exposed on a chromatic material wherein the exposed colors must coincide with the colors which are later to be printed on paper. So as to achieve the color equivalent color picture exposure, the required color density values for the chromatic material of the selected printed and exposed colors are identified with a visual or mensurational comparison of the CIE coordinates. The identified color density values for the exposed colors are allocated to the corresponding color separation values of the colors to be printed and during recording the allocated color density values are utilized instead of the color separation values and are converted into signals for driving a color exposure unit for example a proof recorder.

Abstract: The invention relates to a recording arrangement for image information in the production of printing forms. The laser light modulated with the image content is conducted through a multimode light waveguide into a recording element. There, the modulated laser light illuminates a diaphragm which is imaged onto a light-sensitive recording medium as an exposure point. A multimode light waveguide has the disadvantage that the light distribution at its exit surface is non-uniform due to the modes being formed in the light waveguide. Thus, the diaphragm is likewise non-uniformly illuminated and the exposure point exhibits an inhomogeneous light distribution, whereby the exposure on the recording medium is streaky. What is proposed is to dispose a scatter disk (6) and an additional focusing lens (13) between the exit surface (2) of the light waveguide (1) and the diaphragm (17) and to accordingly dimension the optical spacings.