发明名称 |
PHOTOMETRIC DEVICE FOR CAMERA |
摘要 |
PURPOSE:To enhance the responsibility from higher to lower brightness ranges by interposing between a filter and a light receiving element a light source for bias light supply, which has spectroscopic energy characteristics within the sensitivity wavelength range of the light receiving element but outside of the transmission wavelength range of the filter. |
申请公布号 |
JPS53145617(A) |
申请公布日期 |
1978.12.19 |
申请号 |
JP19770060903 |
申请日期 |
1977.05.25 |
申请人 |
CANON KK |
发明人 |
TSUNEKAWA TOKUICHI;TAGUCHI TETSUYA;ITOU FUMIO;HARIGAYA ISAO |
分类号 |
G03B7/081;G03B7/099;G03B9/62 |
主分类号 |
G03B7/081 |
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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