Device and method for the manufacturing of three-dimensional objects layer-by-layer
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United States of America Patent
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Issued Date -
Apr 1, 2004
app pub date -
Sep 29, 2003
filing date -
Sep 30, 2002
priority date (Note) -
Abandoned
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Abstract
A device and a method for the layer-by-layer generative manufacturing of three-dimensional objects by selective hardening of a previously applied layer by means of laser radiation, wherein a laser (1) contains a switching device (8) for changing the modal composition of the laser radiation. By changing the modal composition of the radiation during the selective hardening of a layer, the focussing features ('focusability') of the radiation is increased in areas (25), in which high structural accuracy is required. In the remaining areas to be illuminated, the required illumination time is reduced by increasing the intensity of the radiation.
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