发明名称 |
Automatic focusing adjustor device |
摘要 |
Automatic focusing adjustor device provided with a focusing sensor signal corresponding to an object distance by photoelectrically comparing an optical image obtainable through a fixed mirror and another optical image obtainable through a movable mirror wherein when the focusing sensor signal is not obtained, two steps of distance adjustment may be made by an output signal from a brightness sensor circuit for use in sensing a brightness of the object.
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申请公布号 |
US4316085(A) |
申请公布日期 |
1982.02.16 |
申请号 |
US19800150666 |
申请日期 |
1980.05.16 |
申请人 |
SEIKO KOKI KABUSHIKI KAISHA |
发明人 |
SAITO, TAKEO;ISHIDA, HIROAKI;SEGAWA, TAKASHI;NAGAOKA, SHINJI;TAKAZAWA, YUZURU |
分类号 |
G03B13/36;G02B7/28;G02B7/30;(IPC1-7):G03B13/20 |
主分类号 |
G03B13/36 |
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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