@article{HeemelsKoningMollerAdam2024a,
  title = {Optimizing freeform lenses for extended sources with algorithmic differentiable ray tracing and truncated hierarchical {B}-splines},
  volume = {32},
  ISSN = {1094-4087},
  url = {http://dx.doi.org/10.1364/OE.515422},
  DOI = {10.1364/oe.515422},
  number = {6},
  journal = {Optics Express},
  publisher = {Optica Publishing Group},
  author = {Heemels,  Alexander and de Koning,  Bart and M\"{o}ller,  Matthias and Adam,  Aurèle},
  year = {2024},
  month = Mar,
  pages = {9730}
}