Process for the production of a three-dimensional object with resolution improvement by “pixel-shift”
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United States of America Patent
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Sep 7, 2010
Grant Date -
Nov 10, 2005
app pub date -
May 9, 2005
filing date -
May 10, 2004
priority date (Note) -
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Abstract
The invention relates to a process or a device for the production of a three-dimensional object by layer-wise solidification of a material which is solidifiable under the application of electromagnetic irradiation by means of mask illumination, wherein the mask is produced using an image forming unit having a prescribed resolution, which is formed from a constant number of image forming elements (pixels) being discrete and being arranged in a spatially mutually fixed manner. For the improvement of the resolution along the outer and inner contours of the sectional areas of the object to be generated layer-wise in the sub-pixel range, a multiple illumination per layer is performed, which consists of a series of multiple images that are mutually shifted in the sub-pixel range in the image/construction plane, wherein a separate mask/bitmap is produced for each shifted image.
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