Manufacturing acceleration of freeform micro-optical arrays (FMOAs) with CAD algorithms

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Zanella, Frédéric
Fernandez, Oscar
Offermans, Ton
Aderneuer, Tamara
Chaves, Julio
Mohedano, Ruben
Basset, Guillaume
Freeform micro-optical arrays (FMOAs) can overcome some limitations of rotationally symmetric optical components. The manufacturability assessment for FMOA designs containing many freeform elements is demanding. We present computer-aided design (CAD) tools that analyze FMOA designs for manufacturing constraints. They 1) extract the height (Sag) and 2) local slope while highlighting areas beyond manufacturing limits, 3) extract the minimum tool radius and 4) convert CADs into ray traceable solids using NURBS for performance comparison of the actual micro-structure to the design. Critical parameters can be identified early, reducing time-consuming and costly adjustments later.
Publication Reference
SPIE OPTO, Advanced Fabrication Technologies for Micro/Nano Optics and Photonics XVI, 124330F, San Francisco, CA, USA
This work has been carried out within the PHABULOμS project. The project has received funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement nº 871710 in a public-private partnership with Photonics21.