A process for obtaining three-dimensional shapes by laminating
two-dimensional shapes produced by curing some liquid photopolymerizing resin with a laser beam.
Generally, stereo lithography consists of an ultraviolet laser
source, a laser beam scanner, an elevator device, photopolymerizing resin, and a computer. The
computer has a function to create data for manufacturing the three-dimensional form based on the
characteristics of the resin, and a function to control all the equipment swiftly and precisely.
Accordingly, if a sharply focused laser beam is directed at part of a resin, it will create a
thin-film cured layer. Three-dimensional objects with complex shapes can be fabricated by stacking
cured layers. Compared to conven-tional processing equipment, stereo lithography can quickly
produce a complex three-dimensional shape in a single process, and can produce a completely
different three-dimensional shape with a single piece of equipment by modifying the input data.