| 摘要 |
A stereolithography machine using an "active" mask directly controlled by a computer device as a source for selectively photopolymerising liquid or powdered resins in order to produce three-dimensional objects on the basis of computer data. The "active" mask enabling an entire resin layer to be cured in a single step is particularly a liquid crystal device (9, 10) combined with a light source (8), an emissive video screen (11) or a laser diode or discharge tube device (12). An image of the mask may be projected through a focusing lens (13) onto a sheet member (14) immersed in a vessel (5) filled with liquid resin (4).
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