Disclosed is a method and apparatus for recording information on a disc-shaped record carrier body with a single beam of radiation. The record carrier body is provided with a servo track which preferably exhibits a phase structure and which contains a multitude of sector addresses each associated with...http://www.google.de/patents/US4363116?utm_source=gb-gplus-sharePatent US4363116 - Method, apparatus and record carrier body for optically writing information
