| 摘要 |
<p>An optical head which records and reproduces signals to and from a high-density multilayer optical recording medium and can record and reproduce constantly with aberration in each layer minimized even when the optical recording medium is tilted, and which comprises a light source (1), an object lens (7) for condensing light output from the light source (1) onto an optical recording medium (8), and an object lens tilting means (13) for correcting aberration occurring when the optical recording medium (8) is tilted. The object lens tilting quantity of the object lens tilting means (13) is changed according to information about the tilting of the optical recording medium (8) and information about the substrate thickness of the medium (8).</p> |
