1. Diamond Light Source Ltd, Harwell Science and Innovation Campus, Didcot, Oxfordshire OX11 0DE, United Kingdom
2. Zygo Corporation, 21 Laurel Brook Road, Middlefield, Connecticut 06455, USA
3. S.RI. Tech s.r.l.s, Viale del Lavoro 42A, 35010 Vigonza (Padova), Italy