Over the years, Columbia has been an active member in the Optica/SPIE community. In 2012, students at Columbia and City College of New York SPIE collaboratively hosted SPIE's FOCUS conference in New York City. FOCUS was held in concert with OSA's IONS conference and sponsored in part by Hamamatsu, Snyopsis, American Elements, and Thorlabs. Over 100 student members of the SPIE, OSA, European Optical Society, and American Physical Society representing over 25 countries around the world including Germany, Australia, Armenia, Colombia, and Ukraine participated in FOCUS-IONS.