发明名称 |
Light measuring device |
摘要 |
An improved light measuring device that is capable of measuring light upon initialization from either a flash of light or a manual switch is provided. A sensor assembly can produce a light intensity signal and a change in the intensity of the light measured can be used to produce a first signal. A second signal can be produced by a manually operable member. A counter can be used to count the number of signals and to produce a preparing signal upon an initial signal counted and a start signal upon a subsequent signal counted. Measurement of the amount of light in the circuit can be initially enabled when the counting means counts the first signal and the actual light measurement can be started subsequently upon the counting means initiating a start signal. Various sequences of producing the pair of signals can be utilized to control the operation of the light measuring device.
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申请公布号 |
US4637721(A) |
申请公布日期 |
1987.01.20 |
申请号 |
US19840580116 |
申请日期 |
1984.02.14 |
申请人 |
MINOLTA CAMERA KABUSHIKI KAISHA |
发明人 |
NARUSE, KAZUHIKO;YUASA, YOSHIO |
分类号 |
G01J1/44;G03B7/091;(IPC1-7):G01J1/46 |
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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