sponsored by the Optical Society of America ; Walter G. Driscoll, editor, William Vaughan, associate editor. sponsored by the Optical Society of America ; Michael Bass, editor in chief . sponsored by the Optical Society of America ; Michael Bass, editor in chief. sponsored by the Optical Society of America ; Michael Bass, editor-in-chief. sponsored bythe Optical Society of America ; Michael Bass, editor-in-chief. sponsored by the Optical Society of America, Air Force Office of Scientific Research.