Joseph Braat is Emeritus Professor of Optics at Technische Universiteit Delft, The Netherlands, and a Fellow of the Dutch Royal Academy of Arts and Sciences. Previously he was based at the Philips Research Laboratories in Eindhoven where he worked on optical disc systems for video and audio recording and on high-resolution optical lithography. He was Co-Founder of the European Optical Society and his further research interests are diffraction theory, astronomical imaging and optical metrology.
Peter Török is Professor of Optical Physics at the Nanyang Technological University, Singapore and at Imperial College of Science, Technology and Medicine, London. His research is focused on the theory of diffraction, focusing and microscopy, with particular emphasis on confocal microscopy, spectroscopic imaging and polarisation. Throughout the years he has taught vector calculus, electromagnetism, optical imaging, and optical design theory.