公开(公告)号：US20090034399A1

公开(公告)日：2009-02-05

申请号：US11911504

申请日：2007-02-06

申请人： Kouji Hosokawa ,  Kei Ikeda ,  Kohei Ashiho

发明人： Kouji Hosokawa ,  Kei Ikeda ,  Kohei Ashiho

IPC分类号： G11B7/135 ,  G11B7/00

CPC分类号： G11B19/12 ,  G11B2007/0006

摘要： An objective lens is moved with a disc irradiated with laser light. A maximum value FEmax and a minimum value FEmin of the focus error signal, and a maximum value FSmax of the amplitude of a focus sum signal are measured. “(FEmax−FEmin)/FSmax” is compared with a determination value to determine the type of a disc.

摘要翻译： 用激光照射的盘移动物镜。 测量聚焦误差信号的最大值FEmax和最小值FEmin以及聚焦和信号的振幅的最大值FSmax。 “（FEmax-FEmin）/ FSmax”与确定值进行比较以确定盘的类型。

公开(公告)号：US07852715B2

公开(公告)日：2010-12-14

申请号：US11911504

申请日：2007-02-06

申请人： Kouji Hosokawa ,  Kei Ikeda ,  Kohei Ashiho

发明人： Kouji Hosokawa ,  Kei Ikeda ,  Kohei Ashiho

IPC分类号： G11B7/00

CPC分类号： G11B19/12 ,  G11B2007/0006

摘要： An objective lens is moved with a disc irradiated with laser light. A maximum value FEmax and a minimum value FEmin of the focus error signal, and a maximum value FSmax of the amplitude of a focus sum signal are measured. “(FEmax−FEmin)/FSmax” is compared with a determination value to determine the type of a disc.

摘要翻译： 用激光照射的盘移动物镜。 测量聚焦误差信号的最大值FEmax和最小值FEmin以及聚焦和信号的振幅的最大值FSmax。 “（FEmax-FEmin）/ FSmax”与确定值进行比较以确定盘的类型。