发明名称 |
BELICHTUNGSMESSER FUER EINE EINAEUGIGE SPIEGELREFLEXKAMERA |
摘要 |
A photometric apparatus for single lens reflex camera and of the type in which an exposure value is determined by photometry of light which is transmitted through a photographic optical system and is reflected by at least one of the surfaces of a shutter blind and a film, said apparatus comprising a photoelectric transducer element for receiving light reflected by at least one of the surfaces of a shutter blind and a film, and an operational amplifier for biasing the photoelectric transducer element to maintain the voltage applied thereacross substantially null, thereby enabling a photometric output of the photoelectric transducer element to be effectively derived even when the amount of light received is minimal. |
申请公布号 |
DE2443932(A1) |
申请公布日期 |
1976.01.22 |
申请号 |
DE19742443932 |
申请日期 |
1974.09.13 |
申请人 |
OLYMPUS OPTICAL CO.LTD. |
发明人 |
MAITANI,YOSHIHISA;SHIMOYA,KUNIO;YOSHIDA,MUNEAKI;HASHIMOTO,AKIHIKO;KITAGAWA,MASAHIRO |
分类号 |
G01J1/44;G03B7/083;G03B7/099;G03B7/0997;G03B9/28;G03B9/32;G03B9/62 |
主分类号 |
G01J1/44 |
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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