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Applied Optics

Applied Optics


  • Vol. 44, Iss. 25 — Sep. 1, 2005
  • pp: 5332–5340

Correction of detector nonlinearity in Fourier transform spectroscopy with a low-temperature blackbody

Lars Fiedler, Stuart Newman, and Stephan Bakan  »View Author Affiliations

Applied Optics, Vol. 44, Issue 25, pp. 5332-5340 (2005)

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The nonlinearity of a mercury cadmium telluride photoconductive detector, an integral part of a modified commercial interferometer used for airborne research, has been analyzed and evaluated against a number of correction schemes. A high-quality blackbody with accurate temperature control has been used as a stable and well-characterized radiation source. The detector nonlinearity was established as a function of scene temperature between 194 and 263 K. Second- and third-order corrections to the measured interferogram have been tested by analyzing the measured signal both within and outside the spectral response region of the detector. A combined correction scheme is proposed that best represents the real nonlinear response of the detector.

© 2005 Optical Society of America

OCIS Codes
(040.3060) Detectors : Infrared
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms

Original Manuscript: November 8, 2004
Revised Manuscript: March 1, 2005
Manuscript Accepted: March 4, 2005
Published: September 1, 2005

Lars Fiedler, Stuart Newman, and Stephan Bakan, "Correction of detector nonlinearity in Fourier transform spectroscopy with a low-temperature blackbody," Appl. Opt. 44, 5332-5340 (2005)

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