Christopher Mann, Assistant Professor, Department of Physics And Astronomy. Pictured is Chris Mann in the Optical Metrology Lab. The Optical Metrology Laboratory (OML) is a research and development group located within the Physics and Astronomy Department at Northern Arizona University (NAU). The group currently consists of three graduate students and three undergraduate university students working towards obtaining their degrees in Physics, Electrical Engineering, and Computer Science. We conduct applied optics research and development addressing important issues of industrial and economic competitiveness, biomedical measurement science, and national security.