| 摘要 |
<p>A method for reproducing signals in an optically recording medium of the type in which recording pits are erased or embossed by the temperature rise of the medium caused through projecting a light beam for reading out signals, or of the type in which the reflection factors of recording pits are changed by the temperature rise of the medium caused through projecting a light beam. When the linear recording density of the medium is changed, the substantial size of a reproducing region is so controlled as to be the optimum size corresponding to the linear recording density. Thereby, the always stable reproducing state is obtained. For this purpose, for example, a sensing means (17) for sensing the position of the reproducing region in a radial direction of the magneto-optical disc (11) during the rotation of the disc (11) at a constant speed is provided. By controlling the laser power and the external magnetic field according to the output of the sensing means (17), the substantial size of the reproducing region is so controlled as to be the optimum value corresponding to the linear recording density at each reproducing position.</p> |
