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Stereolithography method and apparatus employing various penetration depths

  • US 5,182,056 A
  • Filed: 10/27/1989
  • Issued: 01/26/1993
  • Est. Priority Date: 04/18/1988
  • Status: Expired due to Term
First Claim
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1. An improved stereolithographic method for producing a three-dimensional object by forming layers of material curable in response to synergistic stimulation adjacent to previously formed layers of material and successively curing the layers of material by exposing the layers of material to a pattern of synergistic stimulation correspond to successive cross-section of the three-dimensional object, the improvement comprising the steps of:

  • curing at least a portion of a first layer of a three-dimensional object, said portion being cured using a first exposure of synergistic stimulation having a first penetration depth; and

    curing said portion of the first layer using at least a second exposure of synergistic stimulation having a second penetration depth wherein the first and second penetration depths are different.

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