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公开(公告)号:US5596196A
公开(公告)日:1997-01-21
申请号:US449326
申请日:1995-05-24
CPC分类号: G01N21/65 , G01N21/3577 , G01N21/359 , G01N2021/651 , G01N2021/656 , G01N21/658 , G01N2201/1293
摘要: Oxygenated hydrocarbons can be predicted within .+-.0.2% wt or better, using Raman NIR spectroscopy and multivariate analysis, with optional fiberoptics multistreaming. The resulting signal can be used to control concentration of such compounds in product to desired levels.
摘要翻译: 使用拉曼近红外光谱和多变量分析,可以预测氧化烃在±0.2%wt或更好之内,并具有可选的光纤多流。 所得到的信号可以用于控制产品中这些化合物的浓度达到所需的水平。
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公开(公告)号:US6061134A
公开(公告)日:2000-05-09
申请号:US316176
申请日:1999-05-21
申请人: Brian J. Jensen , John B. Cooper , Kent L. Wise
发明人: Brian J. Jensen , John B. Cooper , Kent L. Wise
CPC分类号: G01J3/44
摘要: A modification to a commercial Fourier Transform (FT) Raman spectrometer is presented for the elimination of thermal backgrounds in the FT Raman spectra. The modification involves the use of a mechanical optical chopper to modulate the continuous wave laser, remote collection of the signal via fiber optics, and connection of a dual-phase digital-signal-processor (DSP) lock-in amplifier between the detector and the spectrometer's collection electronics to demodulate and filter the optical signals. The resulting Modulated Fourier Transform Raman Fiber-Optic Spectrometer is capable of completely eliminating thermal backgrounds at temperatures exceeding 300.degree. C.
摘要翻译: 提出了商业傅里叶变换(FT)拉曼光谱仪的修改,用于消除FT拉曼光谱中的热背景。 该修改涉及使用机械光斩波器来调制连续波激光器,通过光纤远程收集信号,以及在检测器和检测器之间连接双相数字信号处理器(DSP)锁定放大器 光谱仪的收集电子设备来解调和滤波光信号。 所得到的调制傅立叶变换拉曼光纤光谱仪能够在超过300℃的温度下完全消除热背景。
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