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Exposure Time-Based Projector Normalization for Additive Manufacturing Devices

  • US 20150123320A1
  • Filed: 11/04/2014
  • Published: 05/07/2015
  • Est. Priority Date: 11/07/2013
  • Status: Active Grant
First Claim
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1. An apparatus for creating three-dimensional objects based on part creation instructions, comprising:

  • (a) a light source comprising at least one controllable light source element;

    (b) a build area positioned adjacent to a solidifiable material, the light source solidifying portions of the solidifiable material adjacent to the build area, the build area comprising a plurality of build area sectors; and

    (c) an additive manufacturing device controller connected to the light source, comprising;

    (i) a calibration module configured to receive, via an additive manufacturing device user interface presented to a user, calibration object results, the calibration object results indicating test structure integrity for a plurality of test structures corresponding to the plurality of build area sectors, the calibration module further configured to create a plurality of temporal compensation values, each of the temporal compensation values corresponding to one of the plurality of build area sectors and chosen to, at a constant brightness, solidify at least a portion of the test structure from the solidifiable material; and

    (ii) an exposure module configured to determine, for each portion of the three-dimensional object created, an exposure time based on the corresponding created temporal compensation value and the part creation instructions, further configured to operate the light source according to the determined exposure times;

    wherein the calibration object comprises the plurality of test structures and is created by the apparatus.

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