TY - JOUR AU - Hamadani, Behrang AU - Seppala, Jonathan AU - Zarobila, Clarence C2 - Optics Express DA - 2020-07-19 DO - https://doi.org/10.1364/OSAC.398260 LA - en PB - Optics Express PY - 2020 TI - 3D printed optical concentrators for LED arrays ER -