| 发明名称 |
AUTOMATIC FOCUS CONTROL DEVICE |
| 摘要 |
PURPOSE:To prevent an erroneous control of focus in the camera by periodically displacing the length of light path between the focusing optical system and the photo-electro-conversion element, and detectinh an output of the photo-electo-conversion element in order to focuse. |
| 申请公布号 |
JPS5257825(A) |
申请公布日期 |
1977.05.12 |
| 申请号 |
JP19750133675 |
申请日期 |
1975.11.07 |
| 申请人 |
CANON KK |
发明人 |
HOSOE SANYA;MATSUMOTO SEIICHI;IWASHITA NORIYOSHI;FUKUSHIMA TADASAKA;YOKOTA HIDEO |
| 分类号 |
G03B13/36;G02B7/09;G02B7/28;G02B7/38;G03B3/00 |
主分类号 |
G03B13/36 |
| 代理机构 |
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代理人 |
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| 地址 |
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