| 摘要 |
The method for exposing a printing plate copies a stored model onto a printing plate. The exposure device includes at least one exposure head (1). Each exposure head (1) has a light source (3), a picture generating unit (8) and a copying optical element (9). The picture generating unit (8) includes electronically controllable micro mirrors arranged in a grid. The stored model is divided into partial images, which are shown in succession by the picture generating unit (8) and the copying optical element (9). Successive partial exposures of the printing plate are made by the at least one exposure head, which is accurately positioned at respective successive exposure positions by an electric linear drive so that individual copies of the partial images are combined into a total image on the printing plate with a position accuracy of better than 5 microns. Exposure times are shortened while maintaining copy quality. |
