Photo-curable 3D printing apparatus and imaging system therefor

摘要

The present invention provides an imaging system for a photocurable 3D printing apparatus including a light source, a liquid crystal panel, a first polarizing filter, a second polarizing filter, a focusing lens array, a projection lens, and a controller. Provided. In the imaging system, a focusing lens array is provided on the light incident side of the liquid crystal panel, each focusing lens in the focusing lens array corresponds to each pixel of the liquid crystal panel, and each focusing lens is irradiated to the corresponding pixel. The beam is focused so that the light beam passes through the transmission region of the pixel as much as possible. A deflection lens is disposed on the light output side of the liquid crystal panel, and rotates around at least one axis perpendicular to the optical axis of the imaging system in order to finely adjust the projection position of the beam image onto the surface of the photosensitive material. Can be rotated. The controller instructs the light source to perform multiple exposures, and instructs the deflection lens to deflect each exposure, thereby projecting a beam image resulting from each exposure onto different parts of the surface of the photosensitive material. .