发明名称 |
Method and apparatus for sensing optical disk defects |
摘要 |
<p>The present invention provides a deficiency detecting apparatus that can accurately detect dusts and deficiencies on an optical disk even when an emitting power of a laser light source changes. The deficiency detecting apparatus is provided with a deficiency detecting section for detecting deficiencies or the like on an optical disk by reflected light, and a power adjusting section for adjusting an emitting power of a laser light source to be an optimum value. The deficiency detecting section can accurately detect the deficiencies on the optical disk even when the laser power changes by comparing a threshold value, which is determined in accordance with the adjustment result of the power adjusting section, with a value in accordance with the reflected light. <IMAGE></p> |
申请公布号 |
EP1541996(A1) |
申请公布日期 |
2005.06.15 |
申请号 |
EP20030797621 |
申请日期 |
2003.09.17 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
UEDA, EIJI;KISHIMOTO, TAKASHI;YAMADA, SHIN-ICHI |
分类号 |
G01N21/95;G11B7/0037;G11B7/004;G11B7/125;(IPC1-7):G01N21/95 |
主分类号 |
G01N21/95 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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