| 发明名称 |
Finder optical system |
| 摘要 |
A finder optical system wherein a field mask is arranged in a position near to an eyepiece from a field lens so that a distortionless image of the field mask may be observed. The field mask can be provided directly on the peripheral side of the field lens.
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| 申请公布号 |
US4492440(A) |
申请公布日期 |
1985.01.08 |
| 申请号 |
US19820343363 |
申请日期 |
1982.01.27 |
| 申请人 |
OLYMPUS OPTICAL CO., LTD. |
发明人 |
NISHIOKA, KIMIHIKO |
| 分类号 |
G03B13/26;G02B23/14;G03B19/12;(IPC1-7):G02B25/00 |
主分类号 |
G03B13/26 |
| 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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