发明名称 |
Overlay recording prevention device for optical disc apparatus |
摘要 |
An overlay recording prevention device for an optical disc apparatus detects a signal corresponding to a recording pit of a recorded track. This signal is detected from a photoelectric signal of an optical head when a tracking error occurs in the recording mode and a beam spot is shifted onto an already-recorded track. A high-level recording laser beam is stopped in response to this detection signal.
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申请公布号 |
US4570251(A) |
申请公布日期 |
1986.02.11 |
申请号 |
US19830473630 |
申请日期 |
1983.03.09 |
申请人 |
TOKYO SHIBAURA DENKI KK |
发明人 |
YOKOTA, TSUNESHI;NAKAGAWA, AKIRA |
分类号 |
G11B7/00;G11B7/0045;G11B19/04;G11B27/36;(IPC1-7):G11B21/12 |
主分类号 |
G11B7/00 |
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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