| 摘要 |
An optical head comprises an integrated unit for recording and reproducing page data on a reflective recording medium, wherein the integrated unit includes recording and reproducing units each corresponding to a bit of data of the page data, wherein each of the recording and reproducing units has a light emitter for emitting an object beam and a reference beam, an optical switch for transmitting or blocking the object beam, and a detector. Each of the recording and reproducing units records a bit of data corresponding to a state indicating whether or not a hologram has been formed and reproduces a bit of data corresponding to a state indicating whether or not a reference beam has been received by the light receiver when a reference beam is emitted to a recording position. The integrated unit of the optical head records and reproduces page data on a recording medium by recording and reproducing bit data on the recording medium by each of the recording and reproducing units.
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