Correction: Freeform imaging systems: Fermat's principle unlocks "first time right" design

After publication of this article 1, it is noticed the Author contributions and Funding sections are missing from the back matter. They are hereby provided below. The original article has been updated. Funding This study was funded in part by VUB-OZR and FWO fellowship 12C9817N [Duerr]. Also, in part by BELSPO-IAP, IOF, Hercules/FWO and the Methusalem foundations [Thienpont].