发明名称 |
Focus detecting apparatus provided with a plurality of detecting fields |
摘要 |
An apparatus for detecting the focus-adjusted state of an objective lens comprises a plurality of juxtaposed units each having a lens assembly for receiving light fluxes passed through different areas of the pupil of the objective lens and forming light intensity distributions whose relative position varies in conformity with the focus-adjusted state of the objective lens, and a plurality of photoelectric sensor arrays arranged in a direction orthogonal to the direction in which the areas are arranged for receiving the light intensity distributions and forming a signal indicative of the focus-adjusted state of the objective lens on the basis of the relative position of the light intensity distributions.
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申请公布号 |
US4954701(A) |
申请公布日期 |
1990.09.04 |
申请号 |
US19880281781 |
申请日期 |
1988.12.09 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
SUZUKI, KENJI;OHTAKA, KEIJI;SUDA, YASUO |
分类号 |
G02B7/28;G02B7/34;G03B13/36 |
主分类号 |
G02B7/28 |
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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