Anthony Klein (AM, BEE, PhD, DSc, FAA) is an Emeritus Professor in the School of Physics of the University of Melbourne, where he held a Personal Chair in Physics until his retirement in 1998. He served as Head of the School of Physics from 1987 to 1996; President of the Australian Institute of Physics (1989–91); President of the Australian Optical Society (1985–86); Chairman of the Standards Advisory Committee of the CSIRO National Measurement Laboratories (1985–1995) and Chairman of the Research Committee of the Royal Victorian Eye and Ear Hospital (1991-2010) as well as Chairman of the Beam Instrument Advisory Committee for OPAL (1997–2007). His research accomplishments include several significant fundamental experiments in quantum physics using beams of slow neutrons and many contributions to instrumentation in experimental physics. He shared the Walter Boas Medal of the Australian Institute of Physics in 1990 and shared an ‘R&D 100’ Award for “one of the 100 most technologically significant products of the year 1995”. He was elected a Fellow of the Australian Academy of Science in 1994 and serves as the Chair of the Victorian Regional Group. He was appointed a Member of the Order of Australia in 1999.