According to the present invention, a so-called overwrite operation which records new information while erasing existing information can be reliably performed in an information storage system such as optical disk system. In addition, whether the rewriting of recording has been properly done can be v...http://www.google.es/patents/US5404348?utm_source=gb-gplus-sharePatente US5404348 - Method for recording and reproducing information using at least two energy beams
Method for recording and reproducing information using at least two energy beams
