Exposure method for reducing distortion in models produced through solid imaging by forming a non-continuous image of a pattern which is then imaged to form a continuous hardened image of the pattern
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United States of America Patent
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Jul 4, 1995
Grant Date -
N/A
app pub date -
Apr 12, 1993
filing date -
Apr 12, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for reducing curl in three dimensional computer generated models, created by the sequential exposure of adjacent layers of a photoformable composition, comprising exposing each layer twice, the first exposure being with an image modulated exposure further modulated to produce a series of isolated, anchored islets along the imaged areas, and the second exposure also being image modulated but without the additional modulation, so as to fuse the islets into a continuous solid image.
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