Erosion-free penalty minimization optimization for high-fidelity computed axial lithography

Abstract

Inspired by the idea of tomography, computed axial lithography (CAL) which is a photopolymerization-based volumetric additive manufacturing process, providing a promising 3D printing approach with fast manufacturing speed and isotropic mechanical properties. The structured light projections which laterally illuminate a synchronously rotating container are critical for CAL, whose optimizations are necessary for high-fidelity 3D printing. Here, the erosion-free penalty minimization (EFPM) method is proposed. The whole object space is optimized without losing the edge information of the target geometry. The kinetic model of CAL is demonstrated to reveal the optimization mechanism, where balanced curing processes are found. The CAL based on EFPM method is quantitatively evaluated, where the fidelity can be found significantly enhanced comparing with traditional method.