Calibration algorithm for Fourier transform spectrometer with thermal instabilities
Applied Optics, Vol. 49, Issue 17, pp. 3411-3417 (2010)
http://dx.doi.org/10.1364/AO.49.003411
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Abstract
Complex domain calibration is an efficient method to correct the amplitude and phase of a spectrum obtained from a Fourier transform spectrometer. This method is, however, not directly applicable in the occurrence of a zero path difference (ZPD) shift between a scene interferogram and calibration blackbody interferograms. This situation is likely to happen for a system with thermal instabilities. It is found that a ZPD shift smaller than 1 sampling point can cause a large disagreement between the spectra evaluated from the two interferometer sweep directions. We have developed an algorithm for a complex calibration in the presence of ZPD shifts. The restricting aspect of the real-time capability is taken into account.
© 2010 Optical Society of America
OCIS Codes
(070.6020) Fourier optics and signal processing : Continuous optical signal processing
(120.6200) Instrumentation, measurement, and metrology : Spectrometers and spectroscopic instrumentation
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms
ToC Category:
Spectroscopy
History
Original Manuscript: March 25, 2010
Manuscript Accepted: April 26, 2010
Published: June 9, 2010
Citation
Simon Turbide and Tracy Smithson, "Calibration algorithm for Fourier transform spectrometer with thermal instabilities," Appl. Opt. 49, 3411-3417 (2010)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-49-17-3411
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