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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 43, Iss. 13 — May. 1, 2004
  • pp: 2767–2776

Noise assessment of a Fourier transform infrared spectroradiometer subject to the stability of a conventional laboratory blackbody source

Dennis F. Flanigan, Alan C. Samuels, and Avishai Ben-David  »View Author Affiliations


Applied Optics, Vol. 43, Issue 13, pp. 2767-2776 (2004)
http://dx.doi.org/10.1364/AO.43.002767


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Abstract

A method is described for the measurement of the noise-equivalent spectral radiance (NESR) of Fourier transform infrared (FTIR) spectroradiometers at all wave numbers of a selected range. The method requires minimal detailed knowledge of the sensor and no support equipment beyond a blackbody source. The NESRs of the FTIR spectroradiometer are determined at every wave-number increment in the 700–1300 cm-1 range, for six resolutions, with a conventional blackbody source and ensembles of differential spectra. The NESRs are well behaved and consistent with the expected dependence on resolution; however, they depend on source temperature at the highest (1 cm-1) and lowest (32 cm-1) resolutions, with little or no statistical dependence at intermediate resolutions. Residual source drift is shown to be the likely cause of the dependence at 1 cm-1; the dependence on the source at 32 cm-1 resolution is shown to be most probably due to photon noise. At intermediate resolutions the sensor noise is dominant.

© 2004 Optical Society of America

OCIS Codes
(010.1120) Atmospheric and oceanic optics : Air pollution monitoring
(030.5630) Coherence and statistical optics : Radiometry
(280.1120) Remote sensing and sensors : Air pollution monitoring
(300.6340) Spectroscopy : Spectroscopy, infrared

History
Original Manuscript: June 13, 2003
Revised Manuscript: January 25, 2004
Published: May 1, 2004

Citation
Dennis F. Flanigan, Alan C. Samuels, and Avishai Ben-David, "Noise assessment of a Fourier transform infrared spectroradiometer subject to the stability of a conventional laboratory blackbody source," Appl. Opt. 43, 2767-2776 (2004)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-43-13-2767


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