| 摘要 |
An optical storage apparatus, using the near field optical effect, performs tracking along a track of a recording medium to reproduce information recorded on the recording medium without error. The optical storage apparatus includes a first probe to read information recorded on the recording medium and at least two to judge if the track direction of the recording medium is in accordance with the information scanning direction of the first probe. The apparatus also includes a probe actuator to adjust the tracking direction of the first and second probes using a tracking control signal, and a number of sensors to sense the intensity of radiation probed by the first and second probes and to generate tracking signals corresponding to the sensed radiation. The apparatus also includes a controller to generate a tracking control signal using the tracking signals, and to provide the tracking control signal to the probe actuator.
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