| 摘要 |
A data reproducing method and an apparatus therefor are provided to control an incident angle of a reference beam accurately and improve a data reproducing speed at the same time. A reference beam adjusting unit(14) changes an incident angle and scans a beam on a certain region of a recording medium. A photo detecting unit(19) detects the strength of a diffractive beam in which the beam scanned on the recording medium is diffracted. An image sensor(18) reads data recorded in the recording medium on the basis of the detected strength of the diffractive beam.
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