He conducts research in advanced PAT W. TREZONA received her Ph.D. degree at Impematerials for laser applications, including high gain laser rial College in W. D. Wright's department, where she glass, large aperture passive and active optical switches, investigated a colorimetric problem on the Wright colorand liquid crystal optics. He is currently investigating imeter. Later, colorimetric work continued on the Stiles novel optical finishing technologies and is a co-inventor trichromator at the National Physical laboratory, which of the magnetorheological finishing process, MRF, which she converted into a tetrachromator. She is currently imwas highlighted on the cover of Laser Focus World in proving her model of mesopic photometry and investigat-September 1995. He has enjoyed teaching a popular, ing theoretical aspects of that subject. She is on several hands-on graduate course on optical fabrication and testtechnical committees of Division 1 of the CIE. RICHARD ing at the University of Rochester's Institute of Optics P. PARKINS received an M.A. degree in mathematics annually since 1986. SADEG M. FARIS is founder, presifrom Cambridge University. He has worked in various dent, and CEO of Reveo, Inc., in Hawthorne,