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Proceedings Paper

Metrology for a solar imaging Fourier transform spectrometer working in the far UV: from the instrumental concept to the first experimental results
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Paper Abstract

The spectroscopy of the far UV emission lines of the solar spectrum combined with an imaging capability is essential to understand the physics of the outer solar atmosphere. An imaging Fourier transform spectrometer (IFTSUV) is an attractive instrumental solution to perform such far-UV solar observations. Working in the far UV involves high precision metrology to maintain the optical path difference (OPD) during the entire scanning process of the interferogram. It also involves a compact all-reflection design for UV applications. We present the specification of a servo-system that enables dynamic tip/tilt alignment compensation and OPD sampling measurement of the IFTSUV scanning mirror. We also discuss the first experimental results of a breadboard as well as the preliminary design of a space-based device.

Paper Details

Date Published: 13 September 2012
PDF: 12 pages
Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 84500D (13 September 2012); doi: 10.1117/12.926027
Show Author Affiliations
C. Ruiz de Galarreta Fanjul, Institut d'Astrophysique Spatiale (France)
M. Bouzit, Institut d'Astrophysique Spatiale (France)
T. Appourchaux, Institut d'Astrophysique Spatiale (France)
K. Dassas, Institut d'Astrophysique Spatiale (France)
T. Viale, Institut d'Astrophysique Spatiale (France)
A. Philippon, Institut d'Astrophysique Spatiale (France)
J.-C. Vial, Institut d'Astrophysique Spatiale (France)
J.-P. Maillard, Institut d'Astrophysique de Paris (France)

Published in SPIE Proceedings Vol. 8450:
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II
Ramón Navarro; Colin R. Cunningham; Eric Prieto, Editor(s)

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