Patent ID: 6036911
Filing Date: 2000-03-14
Classification: B29C,B33Y,G01J,G03F,G05B,G06T

Abstract:
In a stereolithographic method for constructing an object from a medium solidifiable upon exposure to synergistic stimulation, comprising the successive formation of layers of the medium applied to previously formed layers of the medium, each layer of the medium having a desired thickness, and selectively exposing the layers to synergistic stimulation in a pattern corresponding to cross-sections of the three-dimensional object, to build up the three-dimensional object layer by layer, the pattern including paths of exposure defined by vectors, with the exposure of the vectors resulting in a cure depth and a cure width to form an object, the improvement comprising:formng at least portions of a plurality of layers from at least two similar sets of vectors;alternating the order in which the similar sets of vectors are exposed over at least two layers.