BARRINGTON, N.J., May 9 -- Edmund Optics, of Barrington, N.J., announced it appointed Ruth Stevens, an adjunct professor of marketing at Columbia Business School, to its board of directors. Stevens is president of eMarketing Strategy, based in New York City. She was recently chief marketing officer at two Internet startup companies in New York and previously had direct-marketing responsiblities at IBM, Ziff-Davis and Time Warner.