Method and apparatus for identifying surface features associated with selected lamina of a three-dimensional object being stereolithographically formed
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United States of America Patent
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Aug 31, 1999
Grant Date -
N/A
app pub date -
May 13, 1997
filing date -
May 13, 1997
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Abstract
This invention relates to the stepwise layer-by-layer formation of a three-dimensional object through application of the principles of stereolithography and to the automatic detection of surface features of each layer of a three-dimensional object to manufacture parts more reliably, more accurately and more quickly. Automatic detection of trapped volume regions and size of solidified cross-sectional regions are disclosed. Automatic selection of recoating styles is made based on (1) the detected regions,(2) empirically or otherwise determined optimum recoating styles for different types of regions, and (3) a look-up table, other correlation system, or processor for associating recoating style information with laminae containing particular identified regions.
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