发明名称 |
Photometric device |
摘要 |
A photometric device of the kind obtaining information on the luminance of each of photometric areas defined by dividing a photographing field at least into a middle area and a peripheral area and computing a photometric value on the basis of luminance information obtained from the middle and peripheral areas includes: detecting means for detecting whether the luminance information obtained from the peripheral area exceeds a given upper limit luminance level; and correcting means which is arranged to substitute a specific luminance information value for the luminance information obtained from the peripheral area when the latter is detected by the detecting means to be exceeding the upper limit luminance level.
|
申请公布号 |
US4870443(A) |
申请公布日期 |
1989.09.26 |
申请号 |
US19870134814 |
申请日期 |
1987.12.18 |
申请人 |
CANON KABUSHIKI KAISHA |
发明人 |
HAYAKAWA, SHINGO;KIYOHARA, SHUICHI |
分类号 |
G01J1/44;G01J1/42;G03B7/081;G03B7/091;G03B7/099;G03B7/28 |
主分类号 |
G01J1/44 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|