In the stereolithography process, 3D objects made of liquid plastic are created directly from CAD data. After immersing in the photopolymer bath, the raw material is first applied uniformly to the build platform with a wiper. A laser, which is controlled by moving mirrors, moves over the surface and cures it locally at the coordinates specified in the CAD file. The platform then lowers, dips into the plastic bath again, and the wiper distributes the photopolymer evenly on the build platform again. After curing by the laser, the process is repeated until the last layer of the model has been printed and the finished 3D object stands on the base plate.
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