Active Laser Guide Star refocusing system for EAGLE instrument E. Hugot, F. Madec, S. Vives, E. Chardin, M. Ferrari, D. Le Mignant, J. L. Gimenez, S. Mazzanti, P. Vola and J. Cuby Published online: 24 February 2010 DOI: 10.1051/ao4elt/201004008