| 摘要 |
<p>An optical disk device capable of preventing the erroneous recording or erroneous deleting on/from other information surfaces different from an information surface in recording during a recording operation to an optical disk having a plurality of layers of recording surfaces. A focus monitor unit monitors for an increase in focus error signals, or a reflection light quantity monitor unit monitors for a reduction in reflection light quantity or detects moved layers of information surfaces during recording. Based on the monitored and detected results, a light intensity control unit lowers the intensity of a light beam to that for reproducing. In addition, the light intensity control unit, when signals are recorded over a plurality of layers of recording surfaces, lowers a light intensity temporarily to that for reproducing and then moves a layer kept track of by the focus of a light beam before a light beam intensity is again raised to that for recording.</p> |
