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Methods and apparatus for production of three-dimensional objects by stereolithography

  • US 5,059,359 A
  • Filed: 04/18/1988
  • Issued: 10/22/1991
  • Est. Priority Date: 04/18/1988
  • Status: Expired due to Term
First Claim
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1. A system for forming a three-dimensional object cross-section by cross-section out of a material capable of selective physical transformation upon exposure to synergistic stimulation, comprising:

  • at least one computer programmed to process data descriptive of said three-dimensional object comprised of at least some polygons having vertices, the polygons substantially spanning a surface of the object, by overlaying the descriptive data with a plurality of slicing planes spaced along a slicing axis, placing at least some of the polygon vertices to at least one of the slicing planes to obtain preliminary descriptive data, and then converting the preliminary descriptive data to data descriptive of object cross-sections; and

    means for selectively exposing layers of said material to said synergistic stimulation in accordance with said data descriptive of said cross-sections to form said object cross-section by cross-section.

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