| 发明名称 |
OPTICAL INFORMATION RECORDING*REPRODUCING DEVICE |
| 摘要 |
PURPOSE:To correct the reflectance change of the recording medium by controlling the gain of the lens focal point control circuit with the sum signal of the photo detector. |
| 申请公布号 |
JPS53110805(A) |
申请公布日期 |
1978.09.27 |
| 申请号 |
JP19770026524 |
申请日期 |
1977.03.09 |
| 申请人 |
MATSUSHITA ELECTRIC IND CO LTD |
发明人 |
DEGUCHI MASAHIRO |
| 分类号 |
H04N5/85;G02B7/28;G02B7/32;G11B7/09 |
主分类号 |
H04N5/85 |
| 代理机构 |
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代理人 |
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| 地址 |
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