TY - JOUR AU - Behrang Hamadani AU - Jonathan Seppala AU - Clarence Zarobila 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 -