发明名称 |
Reproduction of optically recorded signal |
摘要 |
In reproduction of signal recorded on an optical disk by irradiation of laser light beam thereon, interference between reflected diffracted light of +1th order or -1th order and reflected diffracted light of 0th order is coersively induced, and by detecting the interference light, a high frequency signal can be reproduced.
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申请公布号 |
US4969142(A) |
申请公布日期 |
1990.11.06 |
申请号 |
US19890352651 |
申请日期 |
1989.05.12 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
NAGASHIMA, MICHIYOSHI;TAKEMURA, YOSHINARI;OBARA, KAZUAKI |
分类号 |
G11B7/00;G11B7/005;G11B7/12;G11B7/135 |
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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