RECORDING AND REPRODUCING METHOD FOR INFORMATION

摘要

PURPOSE:To obtain a method for executing recording in a short time in a phase change type optical disk for recording information by the irradiation of an energy beam. CONSTITUTION:While rotating a disk at a high speed, nucleus formation of a crystal is executed on a recording film by a first irradiation beam spot 7 and by allowing the crystal to be grown by a second irradiation beam spot 8, recording is executed. Accordingly, recording can be executed by the laser power of the same degree as conventional.