| 发明名称 |
INFORMATION REPRODUCER |
| 摘要 |
PURPOSE:The effect that diffracted light distribution gives on an automatic focusing system is eliminated by so disposing a unidirectional lens and photo detector that their directions are tilted by 45 deg. in relation to the tracking direction. |
| 申请公布号 |
JPS5319806(A) |
申请公布日期 |
1978.02.23 |
| 申请号 |
JP19760094000 |
申请日期 |
1976.08.09 |
| 申请人 |
HITACHI LTD |
发明人 |
TSUNODA YOSHITO;IZUMIDA MORIJI;SAWANO SUSUMU;MAEDA TAKESHI |
| 分类号 |
H04N5/85;G02B7/28;G02B27/00;G11B7/08;G11B7/09;H04N5/84 |
主分类号 |
H04N5/85 |
| 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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