| 摘要 |
PURPOSE: To obtain an optical information recording means capable of simultaneously or in time division reproducing addresses and data by increasing the capacity of the addresses, single amplitude and data capacity. CONSTITUTION: The optical information recording medium 7 is provided thereon with a recording layer 12 for recording or reproducing address information and a recording layer 10 for recording or reproducing data information independently of each other. The address signals of sufficient signal amplitudes are obtd. by this constitution even if a track pitch is narrowed. The sure reproduction is thus executed and the memory capacity is greatly improved. |
