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

C. Ruiz de Galarreta Fanjul; M. Bouzit; T. Appourchaux; K. Dassas; T. Viale; A. Philippon; J.-C. Vial; J.-P. Maillard

doi:10.1117/12.926027

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13 September 2012 Metrology for a solar imaging Fourier transform spectrometer working in the far UV: from the instrumental concept to the first experimental results

C. Ruiz de Galarreta Fanjul, M. Bouzit, T. Appourchaux, K. Dassas, T. Viale, A. Philippon, J.-C. Vial, J.-P. Maillard

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Proceedings Volume 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II; 84500D (2012) https://doi.org/10.1117/12.926027
Event: SPIE Astronomical Telescopes + Instrumentation, 2012, Amsterdam, Netherlands

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.

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C. Ruiz de Galarreta Fanjul, M. Bouzit, T. Appourchaux, K. Dassas, T. Viale, A. Philippon, J.-C. Vial, and J.-P. Maillard "Metrology for a solar imaging Fourier transform spectrometer working in the far UV: from the instrumental concept to the first experimental results", Proc. SPIE 8450, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation II, 84500D (13 September 2012); https://doi.org/10.1117/12.926027

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