| 摘要 |
<p>In an optical head unit according to the invention, a reflection mirror (40) for reflecting a light beam emitted from a laser element (12), to an optical disk (D) is rotated about a predetermined point (60) which is not located on a normal line perpendicular to its reflection surface. The predetermined point is located closer to the optical disk than that reflection point of the reflection surface of the mirror (40), which intersects a first optical axis extending between the laser element and the mirror and a second optical axis extending between the mirror and the optical disk, and at the same time located remoter from the laser element than the reflection point. Alternatively, the predetermined point is located closer to the laser element than the reflection point and remoter from the optical disk (D) than the reflection point. <IMAGE></p> |
