| 摘要 |
In an optical head for radiating a light spot on a magneto-optical recording medium and detecting light received via the medium, there are provided a light source, a condenser lens for condensing light from the light source, a photodetector, and a deflecting device. The photodetector detects interference light between light generated by a magneto-optical effect of the medium and light generated by diffraction on a curved surface of the condenser lens. The deflecting device is arranged between the light source and the recording medium. The deflecting device includes a beam splitter with polarized light splitting characteristics and functions to deflect the light from the light source toward the recording medium.
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