An analytical model for scanning-projection based stereolithography

A modelling method to investigate the total energy received by individual pixels on resin surface is considered for both PSL and SPSL. The modelling shows near identical energy distribution for both methods. The modelling results were attempted to verify experimentally. Four patterns with circular and rectangular features were exposed with both methods. The resulting cured layers were compared via microscopic observation and measurements. Sample measurements show SPSL has a slightly better resolution using an inherently non-uniform exposure system. In large area exposure, SPSL provided less stitching and overlap issue.