Zhu, X. (Inventor), Kristensen, A. (Inventor), Højlund-Nielsen, E. (Inventor), Vannahme, C. (Inventor) & Mortensen, N. A. (Inventor), 15. Dec 2016, IPC No. G02B 5/ 26 A N, Patent No. WO2016198657, 15. Dec 2016, Priority date 12. Jun 2015, Priority No. EP20150171905
Kristensen, A. (Inventor), Højlund-Nielsen, E. (Inventor), Mortensen, N. A. (Inventor) & Nørregaard, J. (Inventor), 2014, IPC No. G02B1/00; G02B5/00; G02B5/18, Patent No. WO2014194920, 11. Dec 2014, Priority date 4. Jun 2013, Priority No. EP20130170492