| 摘要 |
<p>An optical disc apparatus having a high reliability by evading collision of a condenser lens against an optical disc regardless of the focus control in an operation state or in a non-operation state, thereby preventing damage to the condenser lens and the optical disc. When the focus control is in the non-operation state, by using a reflection light amount from the optical disc (1), it is ascertained that the optical beam focus is in the vicinity of the information surface and the condenser lens (15) is driven to be apart from the optical disc (1).</p> |
