초록 ▼

An improved method for stereolithographically making an object by alternating the order in which similar sets of vectors are exposed over two or more layers. In another method, a pattern of tightly packed hexagonal tiles are drawn. Each tile is isolated from its neighboring tiles by specifying break

An improved method for stereolithographically making an object by alternating the order in which similar sets of vectors are exposed over two or more layers. In another method, a pattern of tightly packed hexagonal tiles are drawn. Each tile is isolated from its neighboring tiles by specifying breaks of unexposed material between the tiles. Using an interrupted scan method, vectors are drawn with periodic breaks along their lengths. In another method, modulator and scanning techniques are used to reduce exposure problems associated with the acceleration and deceleration of the scanning system when jumping between vectors or changing scanning directions.

대표청구항 ▼

A method of forming at least a portion of a three-dimensional object on a stacked layer-by-layer basis using stereolithography comprising: a) applying a layer of flowable material capable of solidification upon exposure to synergistic stimulation; b) generating and sequencing a pattern of exposure p

A method of forming at least a portion of a three-dimensional object on a stacked layer-by-layer basis using stereolithography comprising: a) applying a layer of flowable material capable of solidification upon exposure to synergistic stimulation; b) generating and sequencing a pattern of exposure paths, in a prescribed order and direction, for said layer corresponding to a cross section of said object; c) exposing said exposure paths to synergistic stimulation according to said sequencing of said exposure paths to form a layer of said three-dimensional object; and d) repeating steps b) and c) for subsequent layers until said three-dimensional object is formed, wherein the step of sequencing the exposure of said exposure paths is altered with a different sequence of exposure on at least one subsequent layer.