Data Processing Aspects Of Rapid Scanning Very High Resolution Fourier Transform Spectrometers

H. Buijs

doi:10.1117/12.957819

29 October 1979 Data Processing Aspects Of Rapid Scanning Very High Resolution Fourier Transform Spectrometers

H. Buijs

Proceedings Volume 0191, Multiplex and/or High Throughput Spectroscopy; (1979) https://doi.org/10.1117/12.957819
Event: 23rd Annual Technical Symposium, 1979, San Diego, United States

Abstract

In order to achieve high signal to noise ratio in spectra obtained via a fourier transform spectrometer, it is necessary to manipulate interferogram information with a minimum of distortion in addition to maintaining a low level of random noise. This requirement leads to the use of constant gain linear phase detection and amplification of the interferogram signal in particular in the presence of inevitable mirror velocity variations. Oversampling of the signal simplifies the implementation of constant gain linear phase response, but leads to large volumes of data when operating at high resolution. A vector processor has been developed which permits real time digital filtering and phase correction of the oversampled interferogram. The output interferogram, which is represented by the lowest number of samples consistent with the bandwidth of interest, is also symmetric. Simple cosine fourier transformation yields the spectrum.

Citation Download Citation

H. Buijs "Data Processing Aspects Of Rapid Scanning Very High Resolution Fourier Transform Spectrometers", Proc. SPIE 0191, Multiplex and/or High Throughput Spectroscopy, (29 October 1979); https://doi.org/10.1117/12.957819

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