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Stereolithographic apparatus and method of use

  • US 5,247,180 A
  • Filed: 12/30/1991
  • Issued: 09/21/1993
  • Est. Priority Date: 12/30/1991
  • Status: Expired due to Term
First Claim
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1. A stereolithographic apparatus comprising:

  • a vat for receiving a stereolithographic liquid;

    a working surface within the vat;

    an elevating mechanism for controlling the level of the liquid in the vat relative to the working surface; and

    at least one exposure head, each exposure head comprising an illumination source for emitting radiation, the radiation operable to harden the liquid, and an area array deformable mirror device responsive to applied signals for selectively reflecting the radiation to form an image on the surface of the liquid, wherein said exposure head is movable in two dimensions.

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