发明名称 |
Automatic focusing device |
摘要 |
This invention relates to an automatic focusing device, particular capable of foreseeing the position of an object after a predetermined future time based on the results of a plurality of past focusing operations, thus enabling the focusing to the object. An automatic focusing device is provided which executes calculations for the abovementioned foreseeing after the execution of a predetermined number of focusing operations. However, if a focused state is identified in a focusing operation in the course of the execution of the predetermined number of focusing operations, the device is adapted to disregard the first-mentioned focusing operation as if it had not been conducted and to exclude the first-mentioned focusing operation from the counting of the predetermined number of focusing operations.
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申请公布号 |
US5081479(A) |
申请公布日期 |
1992.01.14 |
申请号 |
US19900467196 |
申请日期 |
1990.01.18 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
KADOHARA, TERUTAKE;AKASHI, AKIRA;HIGASHIHARA, MASAKI;OHNUKI, ICHIRO |
分类号 |
G03B13/36;G02B7/28;G02B7/36 |
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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