发明名称 |
Color measurement instrument |
摘要 |
An LED-based color measurement instrument including an illumination system and a sensing system. The illumination system includes modulated LEDs and a temperature control system for regulating the temperature of the LEDs, thereby improving the consistency of their performance. The sensing system includes a photodiode, a transimpedance amplifier, and an integrator in the first stage to cancel the effect of ambient light on the output of the first stage. The sensing system also includes a lens system for imaging a target area of the target sample onto the photo sensor in a manner so that the product of the target area times the solid angle captured by the lens system is generally uniform over a selected range of distances, thereby reducing the positional sensitivity of the instrument with respect to the target sample.
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申请公布号 |
US2005062968(A1) |
申请公布日期 |
2005.03.24 |
申请号 |
US20030669110 |
申请日期 |
2003.09.23 |
申请人 |
PETERSON STEVEN H.;CARGILL MARK A.;VANDERJAGT PETER G.;LAMFERS ROBERT A. |
发明人 |
PETERSON STEVEN H.;CARGILL MARK A.;VANDERJAGT PETER G.;LAMFERS ROBERT A. |
分类号 |
G01J3/02;G01J3/50;(IPC1-7):G01J3/50 |
主分类号 |
G01J3/02 |
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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