ADDITIVE MANUFACTURING APPARATUS AND AN OPTICAL MODULE FOR USE IN AN ADDITIVE MANUFACTURING APPARATUS

摘要

This invention concerns an additive manufacturing apparatus for building an object by consolidating material in a layer-by-layer manner using an energy beam. The additive manufacturing apparatus comprising an optical module for steering a laser beam onto the material and for collecting light generated by an interaction of the laser beam with the material. The optical module comprises a beam splitter angled relative to an optical path shared by the laser beam and the collected light. The beam splitter separates the collected light from a path of the laser beam for directing the collected light to a detector. The optical module further comprises a corrective optical element for correcting for at least one optical aberration introduced into the collected light by the beam splitter.