Microstereolithography using a dynamic mask generator and a noncoherent visible light source

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Abstract
Laser stereolithography deals with the manufacture of 3D objects that are made by space-resolved laser-induced polymerization. In order to obtain 3D micro-objects, we developed a new microstereolithography apparatus based on the use of a dynamic mask generator which allows the manufacture of a complete layer by only one irradiation, the part being manufactured layer by layer. This process is compared of a broad-band visible light source, that leads to the elimination of speckle effects resulting from the conventional use of a laser beam, and of a liquid crystal display as the dynamic mask generator. A lateral resolution of 2 micrometers has been demonstrated, and some examples of high aspect ratio micro-objects are presented.

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