发明名称 |
Active-type auto-focusing mechanism |
摘要 |
An active-type autofocusing mechanism includes a light projector for projecting a light beam from a light source toward an object. A photo detector arrangement includes separate position-sensitive photo detectors disposed with equal spacing in opposite direction with respect to the light projector. A processor is connected to the photodetector arrangement for calculating the distance to the object.
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申请公布号 |
US4814810(A) |
申请公布日期 |
1989.03.21 |
申请号 |
US19870114486 |
申请日期 |
1987.10.28 |
申请人 |
FUJI PHOTO OPTICAL CO., LTD. |
发明人 |
ISHIGURO, MINORU |
分类号 |
G03B13/36;G02B7/32;(IPC1-7):G03B3/00 |
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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