Chen Xiyi, Lin Hai, Wang Dong, Zhu Qingshi. False Lines due to Folding in Fourier Transform Spectroscopy[J]. Chinese Journal of Chemical Physics , 2000, 13(2): 129-134. doi: 10.1088/1674-0068/13/2/129-134
Citation: Chen Xiyi, Lin Hai, Wang Dong, Zhu Qingshi. False Lines due to Folding in Fourier Transform Spectroscopy[J]. Chinese Journal of Chemical Physics , 2000, 13(2): 129-134. doi: 10.1088/1674-0068/13/2/129-134

False Lines due to Folding in Fourier Transform Spectroscopy

doi: 10.1088/1674-0068/13/2/129-134
  • Received Date: 1998-11-17
  • The phenomenon of false lines due to folding in Fourier Transform Spectroscopy is explained using by Nyquist sampling theorem The characters of false lines are discussed. The key to avoid false lines is to use suitable filters to remove the signal outside the wanted spectral region. Two kinds of filters, optical and electrpnic filters namely, are compared to serve this purpose. It is found out that both kind of filters should be combined in order to prevent folding as well as secure a good signal to noise ratio. Some experimental parameters setting rules are advanced. The method proved to be successful in our experiments of recording the v= 3 and v=4 highly vibrational spectra of arsine.
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    沈阳化工大学材料科学与工程学院 沈阳 110142

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False Lines due to Folding in Fourier Transform Spectroscopy

doi: 10.1088/1674-0068/13/2/129-134

Abstract: The phenomenon of false lines due to folding in Fourier Transform Spectroscopy is explained using by Nyquist sampling theorem The characters of false lines are discussed. The key to avoid false lines is to use suitable filters to remove the signal outside the wanted spectral region. Two kinds of filters, optical and electrpnic filters namely, are compared to serve this purpose. It is found out that both kind of filters should be combined in order to prevent folding as well as secure a good signal to noise ratio. Some experimental parameters setting rules are advanced. The method proved to be successful in our experiments of recording the v= 3 and v=4 highly vibrational spectra of arsine.

Chen Xiyi, Lin Hai, Wang Dong, Zhu Qingshi. False Lines due to Folding in Fourier Transform Spectroscopy[J]. Chinese Journal of Chemical Physics , 2000, 13(2): 129-134. doi: 10.1088/1674-0068/13/2/129-134
Citation: Chen Xiyi, Lin Hai, Wang Dong, Zhu Qingshi. False Lines due to Folding in Fourier Transform Spectroscopy[J]. Chinese Journal of Chemical Physics , 2000, 13(2): 129-134. doi: 10.1088/1674-0068/13/2/129-134

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