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Abstract

Method and apparatus for plotting a raster image on a plane record carrier. A computer-stored raster image includes raster points and is convertable into controllable, raster-point related light beams in which picture elements corresponding to the raster points are plotted on the record carrier. The method includes dividing the computer raster image into matrix-like imaginary computer raster image subareas, dividing the raster image of the record carrier into matrix-like imaginary raster image subareas of the record carrier, and associating the subareas of the computer raster image and the subareas of the raster image of the record carrier with each other. The method further includes dividing the computer raster image subareas into n matrix-like imaginary raster point positions, dividing the raster image subareas of the record carrier into n matrix-like imaginary picture element positions, and associating the n matrix-like picture element positions with the n matrix-like raster point positions. Further, the method provides for successively plotting the picture elements that correspond with the raster points in successive time intervals Tq, wherein q represents values 1-n, and simultaneously plotting, during a q.sup.th time interval, respective q.sup.th picture elements associated with a q.sup.th picture element position of the raster image subareas of the record carrier, and moving, during the q.sup.th time interval, an aperture matrix that includes matrix-like arranged aperture matrix fields, each having an aperture for passing a light beam, and aligning each aperture with the q.sup.th picture element position to plot the respective q.sup.th picture element. The apparatus includes the matrix-like arrangements of the computer raster image, the computer raster image subareas, the raster image of the record carrier, and the raster image subareas of the record carrier, and the aperture field.

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First Claim