发明名称 |
Focus detector |
摘要 |
The present invention provides a low-cost focus detector that can carry out a focus detection over a wide field of view and can secure a sufficient light-receiving quantity to have an improved S/N ratio and an improved focus detection precision. A camera has a condenser lens disposed near a predetermined focusing surface of an image pick-up lens. At the rear of the condenser lens, a brightness diaphragm having a pair of apertures is disposed. Further, at the rear of the brightness diaphragm, a telecentric type image re-forming lenses are disposed. Images formed by beam fluxes passed through the image re-forming lenses are received by an image pick-up device that includes photoelectric conversion elements.
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申请公布号 |
US6360059(B1) |
申请公布日期 |
2002.03.19 |
申请号 |
US20000575981 |
申请日期 |
2000.05.23 |
申请人 |
OLYMPUS OPTICAL CO., LTD. |
发明人 |
IDE MASATAKA;GOTO HISASHI |
分类号 |
G02B7/34;G02B7/08;G02B7/28;G03B13/36;H04N3/15;(IPC1-7):G03B13/36 |
主分类号 |
G02B7/34 |
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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