| 摘要 |
An optical recording device forms on a magneto-optical disk 10 a recording mark corresponding to a recording data by focusing a light beam d into a light spot on a projection start position on the moving magneto-optical disk 10 and by raising the temperature of a portion of the magneto-optical disk 10 exposed to the light spot. An optical reproduction device includes a light-beam deflecting section 2a having a polygon mirror 8, a holographic disk, and a plurality of semiconductor lasers for repeatedly performing a unidirectional scanning in synchronism with recording data or a recording clock signal by moving the light spot from the projection start position in a direction equal to the moving direction of the magneto-optical disk 10 and to follow the moving speed of the magnet-optical disk 10.
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