A fiber optic connector includes a plug having a ferrule adapted to be connected to a tip end of an optical fiber, a receptacle associated with a light-emitting element and having a ferrule insertion hole defined therein for receiving the plug therein, the ferrule insertion hole being held in light-transmitting...http://www.google.de/patents/US5104242?utm_source=gb-gplus-sharePatent US5104242 - Fiber optic connector
