Plastic and nonmetallic article shaping or treating: processes – Stereolithographic shaping from liquid precursor
Patent
1997-01-31
1998-11-24
Tentoni, Leo B.
Plastic and nonmetallic article shaping or treating: processes
Stereolithographic shaping from liquid precursor
264308, B29C 3508, B29C 4102
Patent
active
058402390
ABSTRACT:
Embodiments of the instant invention are directed to laser exposure systems that employ a pulsed solid state laser to provide a reactive response wavelength and a pulse repetition rate specifically optimized for application to solidification of a liquid photopolymer in a stereolithographic process. The solid state laser employs two second harmonic crystals for generating an emission wavelength at about 320-345 nm and a pulse repetition rate, wherein the pulse repetition rate is selected such that a resulting pulse separation at the target surface is less than a width of the beam when the beam is being scanned at a desired velocity and an average exposure deposited by the beam is equal to a desired amount.
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Partanen, Jouni P., Lasers and Optics in Stereolithography, The International Society for Optical Engineering, 2703 (27 Jan-2 Feb 1996):502-511.
Hug William F.
Partanen Jouni P.
3-D Systems, Inc.
Tentoni Leo B.
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