A free-space optical communication apparatus includes a storage unit which stores angle-setting information for the mirror for communicating with each of the plurality of other apparatuses, a mirror driving unit which drives the mirror to an angle corresponding to the stored angle-setting information,...http://www.google.de/patents/US7058307?utm_source=gb-gplus-sharePatent US7058307 - Free-space optical communication apparatus and free-space optical communication system
