| 摘要 |
An apparatus for recording/reproducing holographic data which can record holographic data in a data storage medium and can reproduce recorded data includes a light source emitting a laser beam, a lens unit focusing the laser beam emitted from the light source by classifying the laser beam into a reference beam passing through a first area and a signal beam passing through a second area and having a first lens focusing the signal beam to a first focus and a second lens focusing the reference beam to a second focus, and a driving unit driving the first lens to vary the first focus in a depth direction of the data storage medium.
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