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发明公开
CN1855239A 光盘设备及其控制方法 无效 - 撤回

光盘设备及其控制方法
摘要：
本发明涉及光盘设备及其控制方法。其中，一种能够有选择地发射基于蓝光的和基于红光的激光束的光学拾取器(13)，它在发射任何一种激光束的时候在光盘(11)的径向上移动，并基于从光学拾取器(13)获得的信号(TE)检测出光盘(11)的轨道节距是否已经改变。在检测到光盘(11)的轨道节距已经改变的时候，从光学拾取器(13)发射基于蓝光的激光束。在检测到光盘(11)的轨道节距没有改变的时候，从光学拾取器(13)发射基于红光的激光束。
摘要（英）：

An optical pickup (13) capable of selectively emitting blue light based and red light based laser beams is moved to a radial direction of an optical disk (11) while emitting either of the laser beams, and it is detected whether or not a track pitch of the optical disk (11) has changed based on a signal (TE) obtained from the optical pickup (13). In the case where a change in the track pitch of the optical disk (11) has been detected, the blue light based laser beam is emitted from the optical pickup (13). In the case where a change in the track pitch of the optical disk (11) is not detected, the red light based laser beam is emitted from the optical pickup (13).

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