HIGH-PRECISION LARGE-FORMAT STEREOSCOPIC PROJECTION 3D PRINTING SYSTEM AND PRINTING METHOD THEREFOR

The present invention belongs to the technical field of 3D printing, and specifically relates to a high-precision large-format stereoscopic projection 3D printing system and a printing method therefor. A light path projected by a DLP optical projector is reflected and projected by a thin film light splitter to enter a projection lens, and the projection lens projects the light path to an interfacial surface of a thin film and resin in a resin tank; a laser displacement meter is arranged at one side of the projection lens; an image controller is arranged at one side of the thin film light splitter, and a monitoring light path of the image controller coincides with the projected light path reflected by the thin film light splitter; and a sample stage is located in the resin tank, a thin film is also arranged in the resin tank, and a movement control system controls the resin tank, the sample stage and the thin film to move. A three-dimensional geometric model is segmented into two-dimensional pictures, the pict