Patent 7440697 was granted and assigned to BAYERISCHE MOTOREN WERKE AKTIENGESELLSCHAFT on October, 2008 by the United States Patent and Trademark Office.
An apparatus and method for detecting optical defects in optical bus systems which use optical modules in communication with a plurality of nodes connected to each other. Deterioration of the optical transmission quality is detected as a resulting deterioration in an electrical output signal and noted deterioration is stored and read out.