发明申请
- 专利标题： OPTICAL DISC APPARATUS AND OPTICAL DISC DETERMINING METHOD
- 专利标题（中）： 光盘设备和光盘测定方法
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申请号： US11911504申请日： 2007-02-06
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公开(公告)号： US20090034399A1公开(公告)日： 2009-02-05
- 发明人: Kouji Hosokawa , Kei Ikeda , Kohei Ashiho
- 申请人： Kouji Hosokawa , Kei Ikeda , Kohei Ashiho
- 申请人地址： JP OSAKA
- 专利权人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
- 当前专利权人： MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
- 当前专利权人地址： JP OSAKA
- 优先权： JP2006-051407 20060228; JP2006-105757 20060407
- 国际申请： PCT/JP2007/051978 WO 20070206
- 主分类号： G11B7/135
- IPC分类号： G11B7/135 ; G11B7/00
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.
公开/授权文献
- US07852715B2 Optical disc apparatus and optical disc determining method 公开/授权日：2010-12-14
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