Hans I. Bjelkhagen is professor of Interferential Imaging Sciences at De Montfort University in the UK. In 1983, he joined CERN in Geneva (Switzerland), where he was involved in the development of bubble chamber holography. Between 1985 and 1991, he was based at Northwestern University, Evanston, IL, where he worked on the medical applications of holography. Since 1969, he has been involved in display holography, focusing on pulsed holography in particular. He has published over 100 papers in refereed journals and conference proceedings. In 2001, he was awarded the RPS Saxby Medal for his work in holography.