发明名称 |
Focus detecting device utilizing auxiliary illumination |
摘要 |
A focus detecting device for a camera utilizing auxiliary illumination, comprises a sensor for detecting the image of a photographic object, a first light emitter for projecting a first auxiliary light toward the object, a second light emitter for projecting a second auxiliary light toward the object. The second auxiliary light illuminates a smaller area than the first auxiliary light. The first and second light emitters are selectively driven in response to brightness of the object, thereby to produce a contrasty light image onto the object.
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申请公布号 |
US5150146(A) |
申请公布日期 |
1992.09.22 |
申请号 |
US19900610333 |
申请日期 |
1990.11.05 |
申请人 |
MINOLTA CAMERA KABUSHIKI KAISHA |
发明人 |
UEDA, HIROSHI;MATSUI, TORU;OKISU, NORIYUKI |
分类号 |
G02B7/32 |
主分类号 |
G02B7/32 |
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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