Colour Science

About the authors Gunter Wyszecki is currently Assistant Director of the Division of Physics, National Research Council of Canada, and Head of its Optics Section. Prior to this, he held positions with the National Bureau of Standards (as a Fulbright Scholar, 1953 54) and the Berlin Federal Bureau of Testing Materials (1954 55). In 1979, Dr. Wyszecki received the Gold Medal of the Association Internationale de la Couleur, the Inter--Society Color Council's Godlove Award, and the Federation of Societies of Coating Technologies' Bruning Award. He is a Fellow of the Royal Society of Canada, the Optical Society of America, the illuminating Engineering Society, and Vice--President of the Commission Internationale de l'Eclairage. Dr. Wyszecki is the co--author (with D.B. Judd) of Color in Business, Science, and Industry, 3rd Edition (Wiley). He received his Dr.--Ing. from the Technical University of Berlin. W.S. Stiles was Deputy Chief Scientific Officer, National Physical Laboratories, Teddington, England, until his retirement in 1961. The joint discoverer of the Stiles--Crawford Effect, Dr. Stiles recently published his selected papers in a volume entitled Mechanisms of Colour Vision. Among his many honors and awards, he received the 1944 Carpenter Medal of London University and the 1964 Tillyer Medal of the Optical Society of America. Dr. Stiles is a past president of the Illuminating Engineering Society of Great Britain, past chairman of the Colour Group of Great Britain, a Fellow of the Royal Society, and the Optical Society of America, and an Officer of the British Empire. He received his Ph.D. and D.Sc. from University College, London.