Software Design of Transmission Rotary Mirror Fourier Spectrometer Based on Lab VIEW
In order to meet the requirements of data acquisition,nonlinear fitting compensation,signal prepro-cessing and Fourier spectrum inversion of transmission rotary mirror Fourier spectrometer,a set of transmis-sion rotary mirror Fourier spectrum analysis software integrating data acquisition and signal analysis is designed based on Lab VIEW.By calling the physical channel interface of NI data acquisition card,the software collects the interferogram data of the amplitude of interference signal changing with time,and restores the spectrum information of infrared signal by signal processing program.It can realize automatic storage of waveform files and visualization of important data processing processes,which is suitable for industrial computer applications.The spectral curve of blackbody radiation source is measured.The wavelength accuracy is measured by poly-styrene absorption spectrum,and the spectral half-height width is measured by water vapor spectrum curve.By using the spectral analysis software designed in this paper,the spectral distribution of infrared signal is re-covered.The wavelength accuracy of 0.40％and the spectral resolution of 0.88 cm-1 are achieved,which veri-fies the usability of the system.
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