초록 ▼

An improved stereolithography system for generating a three-dimensional object by creating a cross-sectional pattern of the object to be formed at a selected surface of a fluid medium capable of altering its physical state in response to appropriate synergistic stimulation by impinging radiation, pa

An improved stereolithography system for generating a three-dimensional object by creating a cross-sectional pattern of the object to be formed at a selected surface of a fluid medium capable of altering its physical state in response to appropriate synergistic stimulation by impinging radiation, particle bombardment or chemical reaction, information defining the object being specially processed to reduce curl, stress, birdnesting and other distortions, the successive adjacent laminae, representing corresponding successive adjacent cross-sections of the object, being automatically formed and integrated together to provide a step-wise laminar buildup of the desired object, whereby a three-dimensional object is formed and drawn from a substantially planar surface of the fluid medium during the forming process.

대표청구항 ▼

A method for producing a three-dimensional object from an object representation out of a medium capable of selective physical transformation upon exposure to synergistic stimulation, comprising the steps of: successively forming horizontal layers of said medium on top of previously-formed layers of

A method for producing a three-dimensional object from an object representation out of a medium capable of selective physical transformation upon exposure to synergistic stimulation, comprising the steps of: successively forming horizontal layers of said medium on top of previously-formed layers of said object; selectively exposing said layers of said medium to said synergistic stimulation in accordance with a building representation, having at least a portion which deviates from a corresponding portion of said object representation by inclusion of a deviation, to form said object substantially layer by layer; whereupon a portion of said object comprising at least one substantially formed layer of said object is created which deviates according to said deviation from said corresponding portion of said object representation by inclusion of an unexposed area; and wherein said area is situated near a boundary between a first portion of a first layer of said object which is not supported by a previously-formed layer, and a second portion of said first layer which is supported by a previously-formed layer, and whereupon said area is also situated above said first layer, to reduce distortion in said object. An apparatus for producing a three-dimensional object out of a medium capable of selective physical transformation upon exposure to synergistic stimulation, comprising: at least one computer programmed to form a building representation of the object which deviates from a corresponding object representation by inclusion of a deviation to reduce distortion in said object, the deviation specifying at least one unexposed area in a substantially formed layer of the object, the at least one unexposed area remaining unexposed during formation of the layer, the layer having a first portion and a second portion, and the at least on unexposed area also substantially isolating the first portion from the second portion; and means coupled to said at least one computer for receiving said building representation, and for selectively exposing said medium to said synergistic stimulation in accordance with said building representation to form said object substantially layer by layer.