Method for optical information recording.

摘要

In a single beam overwrite method, wherein optical film recording medium having thin recording film capable of reversible change of phase by irradiating different level laser lights, etc, the laser light is modulate to have three energy levels, i.e., a recording power level (PW), an erasing power level (PE) and a very short time of cooling power level (PC) which is provided immediately after the recording power level (PW).