Multi-point Micro-stereolithography Using Microlens Array

—Mass Production of Overhanging Structures—

Abstract

Stereolithographies (SLs) using conventional methods lacks the ability to fabricate bulk multiple or mass parts simultaneously. In most cases. this is due to the fact that there is only one light source, e.g.a laser. Meanwhile, using multiple light sources for multipoint projection is expensive. In this experiment, we used a projector with a digital mirror device (DMD) and microlens arrays to simultaneously produce multiple micro-SL parts. We devised a multipoint fabrication method that employs mold image projection and microlens arrays. The object is fabricated on a controlled glass base that translates on X-Y table and translates on the Z-axis for lamination. We confirmed the formation of SL parts containing overhanging structures.