发明名称 |
Photometric optical system for single-lens reflex electronic photographic camera |
摘要 |
A portion of the light passing through the compensation filter of a viewfinder optical system is diverted to a photometric member for the purpose of generating a signal representative of the intensity of the light passing through the objective of a single-lens reflex electronic photographic camera. Preferably, the compensation filter is constructed as a beam splitter; the adjoining flat surfaces of two pieces of optical material are cemented together by a material that forms a semi-transmissive coating therebetween.
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申请公布号 |
US4626918(A) |
申请公布日期 |
1986.12.02 |
申请号 |
US19840684124 |
申请日期 |
1984.12.20 |
申请人 |
ASAHI KOGAKU KOGYO KABUSHIKI KAISHA |
发明人 |
MORISAWA, TAHEI |
分类号 |
G01J1/04;G01J1/22;G03B7/099;G03B19/12;H04N5/225;(IPC1-7):H04N5/225 |
主分类号 |
G01J1/04 |
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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