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Proceedings Paper • Open Access

Progress report of a static Fourier transform spectrometer breadboard
Author(s): A. Rosak; F. Tintó

Paper Abstract

MOLI instrument -for MOtionLess Interferometer- takes advantage of the new concept of static Fourier transform spectrometer. It is a high-resolution spectrometer working over a narrow bandwidth, which is adapted to a wide range of atmospheric sounding missions and compatible with micro-satellite platform.

The core of this instrument is an echelette cube. Mirrors on the classical design are replaced by stepped mirrors -integrated into that interference cube- thus suppressing any moving part. The steps’ directions being set over a perpendicular axis, the overlap of both stepped mirrors creates a cluster of so-called “echelettes”, each one corresponding to a different optical path difference (OPD). Hence the Fourier transform of the incoming radiance is directly imaged on a CCD array in a single acquisition.

The frequency domain of the measurements is selected by an interferential filter disposed on the incoming optical path. A rotating wheel equipped with several filters allows the successive measurement of spectra around some bands of interest, i.e. O2, CO2 and CO absorption bands.

Paper Details

Date Published: 21 November 2017
PDF: 4 pages
Proc. SPIE 10568, International Conference on Space Optics — ICSO 2004, 1056809 (21 November 2017); doi: 10.1117/12.2307973
Show Author Affiliations
A. Rosak, CNES (France)
F. Tintó, CNES (France)

Published in SPIE Proceedings Vol. 10568:
International Conference on Space Optics — ICSO 2004
Josiane Costeraste; Errico Armandillo, Editor(s)

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