发明名称 |
Detector methods and apparatus |
摘要 |
A method and apparatus for detecting radiation in a relatively narrow wavelength band within radiation having a wide range of wavelengths. The method comprises detecting radiation in a first wavelength band including the narrow wavelength band and other wavelengths; detecting radiation in a second wavelength band which comprises substantially only the other wavelengths; and comparing the levels of detected radiation to determine the presence of radiation in the narrow wavelength band.
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申请公布号 |
US6024202(A) |
申请公布日期 |
2000.02.15 |
申请号 |
US19980009411 |
申请日期 |
1998.01.20 |
申请人 |
DE LA RUE INTERNATIONAL LIMITED |
发明人 |
POTTER, MICHAEL |
分类号 |
G01J3/443;G01J3/28;G01J3/44;G01N21/64;G07D7/12;(IPC1-7):G07D7/00 |
主分类号 |
G01J3/443 |
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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