Wall smoothness, feature accuracy and resolution in projected images via exposure levels in solid imaging
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United States of America Patent
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Aug 16, 2016
Grant Date -
Mar 6, 2008
app pub date -
Aug 29, 2006
filing date -
Aug 29, 2006
priority date (Note) -
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Abstract
A solid imaging apparatus and method employing levels of exposure varied with gray scale or time or both of digitally light projected image of a cross-section of a three-dimensional object on a solidifiable photopolymer build material. The gray scale levels of exposure of projected pixels permits the polymerization boundaries in projected boundary pixels to be controlled to achieve preserved image features in a three-dimensional object and smooth out rough or uneven edges that would otherwise occur using digital light projectors that are limited by the number of pixels in an image projected over the size of the image. Software is used to control intensity parameters applied to pixels to be illuminated in the image projected in the cross-section being exposed in the image plane.
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