| 发明名称 |
AUTOMATIC FOCUSING DEVICE |
| 摘要 |
PURPOSE:To prevent an objective lens from contacting with a video disc, even when the lens comes abnormally close to the disc, by providing a stopper in the objective lens moving mechanism of the video disc. |
| 申请公布号 |
JPS53131007(A) |
申请公布日期 |
1978.11.15 |
| 申请号 |
JP19770045162 |
申请日期 |
1977.04.21 |
| 申请人 |
TOKYO SHIBAURA ELECTRIC CO |
发明人 |
YAMAGUCHI TAKASHI |
| 分类号 |
G02B7/09;G11B7/08;G11B7/09 |
主分类号 |
G02B7/09 |
| 代理机构 |
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代理人 |
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| 地址 |
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