Micro-3D-printed multi-aperture freeform ultra-wide-angle systems: production, characterization, and correction

Modern two-photon-polymerization 3D printing technology allows for the creation of almost arbitrary three-dimensional structures for the production of complex freeform optical surfaces. While being highly controllable and accurate to below 100nm some systematic deviation by volumetric changes during the polymerization and development process remains. This can however be corrected for when the surface deviation is known. We present a method to include repeatable measurements and the consequent shape correction during the production process of monolithically created complex freeform lens systems. Measurement concepts as well as consequences to shape improvements are shown. An example for the application of such corrections for the creation of low profile multi-aperture large field of view objectives is presented.