A STEREOLITHOGRAPHIC 3D PRINTER AND A METHOD FOR MEASURING AND CORRECTING DEVIATION OF RADIATION INTENSITY THEREFOR

摘要

The present invention relates to a photocurable 3D printer, comprising an optical engine, a light quantity receiver, and a controller. The optical engine projects image light. The light quantity receiver is separated from the optical engine at a predetermined interval, and detachably disposed in a resin bath containing a photocurable resin. The light quantity receiver has a plurality of light quantity measurement sensors, which are arranged at the output position of a molded article and receive the image light. The controller controls the optical engine to generate image light for measuring the light quantity; evaluates the deviation of the liquid quantity in the projected plane on the basis of the light quantity data for each location, measured by the light quantity receiver; and corrects the light quantity for each plane area, of the image light projected from the optical engine, on the basis of the evaluated deviation of the liquid quantity. In addition, the present invention provides a method for measuring the light quantity of the optical engine of the photocurable 3D printer, and a method for correcting the light quantity. According to the present invention, the measurement and correction of the light quantity can be efficiently performed at high precision.