METHOD AND DEVICE FOR REMOVING MATERIAL FROM A THREE-DIMENSIONAL SURFACE IN A MULTI-LAYERED MANNER BY MEANS OF A LASER, USING A POLYGON NETWORK WHICH IS DESCRIBED BY A MATHEMATICAL FUNCTION AND REPRESENTS THE SURFACE

摘要

The invention relates to a method for removing material from a three-dimensional surface (1) of any shape in a multi-layered manner by means of a material removing means (9), such as a laser, that acts in points on a surface. According to said method, a surface structure (2) is applied to the three-dimensional surface (1). The inventive method can be carried out in such a way that the surface (1) is described by a mathematical function, and is then approximated by a polygon network, each polygon of the polygon network being associated with the machining region of the laser. Raster images are associated with each of the polygons, said raster images indicating the depth values for the surface structure by means of shades of grey. The polygons (3) are removed line-by-line by the removing means (9). In the event of widely divergent depth values of the surface structure, the material is removed in a plurality of layers (7) of polygon networks.