| 摘要 |
PURPOSE:To facilitate position detection and to enable high-speed positioning by providing a step and a position detection mark in a recording area on a recording medium and forming the recording area in a projection or recessed shape for the position detection. CONSTITUTION:A light source 401 and a light receiving part 402 are installed at a position where scattered light generated by the step on the recording medium is obtained and a probe electrode 202 is moved onto the recording medium corresponding to the position coordinates of the recording medium to perform recording, reproduction, or erasure at the position of the position coordinates. In this case, an LED or optical fiber, etc., is usable as the light source 401 in addition to a semiconductor laser and an He-Ne laser. Consequently, the scattered light from the edge of the recording area 106 and position detection mark 105 is detected to perform feedback control which is generally carried out, thereby performing the position detection.
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