| 摘要 |
An information recording/reproducing apparatus for overwriting information by applying light from an optical head to a record area and a space of a rewritable recording medium and changing a state of the record area and for reading the information recorded in the record area. The apparatus includes a detector circuit for detecting a state of the record area and the space where information is already recorded by detecting a reflection light while recording information thereon by overwriting, a control circuit for calculating a radiation power used for recording the information and for forming the space on the record area so as to overwrite where information is already recorded in the recording medium, in accordance with the detected reflection light, a pulse generator circuit, and an optical driver circuit.
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