发明名称 |
Photometric apparatus and photometric method |
摘要 |
Photometric apparatus and photometric method measure a wide range of incident light amounts accurately and efficiently. The photometric apparatus includes an optical sensor for delivering a photocurrent; an integrator capacitor for integrating the photocurrent to provide an integrated voltage; a voltage measurer measuring the integrated voltage; an integration time measure for measuring an integration time which the integrator capacitor integrates the photocurrent; for resetting the integrator capacitor whenever the voltage across the integrator capacitor exceeds a given voltage value; a summer summing a total voltage value integrated by the integrator capacitor during the given time including at least one reset; and a photometric calculator for calculating a photometric value based on the total voltage value and on the integration time.
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申请公布号 |
US6664777(B2) |
申请公布日期 |
2003.12.16 |
申请号 |
US20010961827 |
申请日期 |
2001.09.24 |
申请人 |
SEIKO PRECISION INC. |
发明人 |
HYAKUTAKE KENJI;SAITO HIROYUKI;AKIYAMA KAZUYUKI |
分类号 |
G01J1/44;G01J1/46;G03B7/08;G03B7/091;G03B7/28;(IPC1-7):G01R22/00 |
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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