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Journal of the Optical Society of America A

Journal of the Optical Society of America A


  • Editor: Franco Gori
  • Vol. 29, Iss. 6 — Jun. 1, 2012
  • pp: 936–944

Angular acceptance analysis of an infrared focal plane array with a built-in stationary Fourier transform spectrometer

Frédéric Gillard, Yann Ferrec, Nicolas Guérineau, Sylvain Rommeluère, Jean Taboury, and Pierre Chavel  »View Author Affiliations

JOSA A, Vol. 29, Issue 6, pp. 936-944 (2012)

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Stationary Fourier transform spectrometry is an interesting concept for building reliable field or embedded spectroradiometers, especially for the mid- and far- IR. Here, a very compact configuration of a cryogenic stationary Fourier transform IR (FTIR) spectrometer is investigated, where the interferometer is directly integrated in the focal plane array (FPA). We present a theoretical analysis to explain and describe the fringe formation inside the FTIR-FPA structure when illuminated by an extended source positioned at a finite distance from the detection plane. The results are then exploited to propose a simple front lens design compatible with a handheld package.

© 2012 Optical Society of America

OCIS Codes
(040.3060) Detectors : Infrared
(300.6190) Spectroscopy : Spectrometers

ToC Category:

Original Manuscript: December 21, 2011
Manuscript Accepted: February 11, 2012
Published: May 21, 2012

Frédéric Gillard, Yann Ferrec, Nicolas Guérineau, Sylvain Rommeluère, Jean Taboury, and Pierre Chavel, "Angular acceptance analysis of an infrared focal plane array with a built-in stationary Fourier transform spectrometer," J. Opt. Soc. Am. A 29, 936-944 (2012)

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  20. In fact, one should also take into account the optical path to go from M to its image M1 by the first arm of the interferometer, and the one to go from M to its image M2 by the second arm of the interferometer. Indeed, the stigmatism hypothesis between M and M1, for instance, means only that the path to go from M to M1 does not depend on the considered ray, but it does depend on point M or on the considered arm. However, this is only a phase term, and as long as we are interested mainly in the contrast of the fringes, we will omit this term.
  21. Considering large incident angles, we should use the Fresnel formula for each polarization. Nevertheless, in the rest of this article, we will only use the Fresnel coefficients under normal incidence.

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