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Proceedings Paper

Optical cavity characterization of the Tor Vergata Fabry-Pérot interferometer
Author(s): Luca Giovannelli; Francesco Berrilli; Dario Del Moro; Vincenzo Greco; Roberto Piazzesi; Andrea Sordini; Marco Stangalini
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Paper Abstract

We report the first optical and control performances of the Tor Vergata Fabry-P´erot interferometer prototype designed and realized in the framework of the ADvanced Astronomy for HELIophysics (ADAHELI) solar mission project. The characterization of the the coated surfaces of the two plates defining the optical cavity has been carried out with a Zygo interferometer able to measure the microroughness and global curvature of the cavity. The peak-to-valley errors are compliant with the manufacturer specifications and correspond to λ/70 and λ/80 @632.8 nm respectively. In addition, we present a first estimate of the interferometer spectral stability in stable open-air condition. A spectral uncertainty equal to 0.95 pm is found as the typical RMS over one hour of the passband central wavelength position.

Paper Details

Date Published: 28 July 2014
PDF: 8 pages
Proc. SPIE 9147, Ground-based and Airborne Instrumentation for Astronomy V, 914782 (28 July 2014); doi: 10.1117/12.2056477
Show Author Affiliations
Luca Giovannelli, Univ. degli Studi di Roma "Tor Vergata" (Italy)
Francesco Berrilli, Univ. degli Studi di Roma "Tor Vergata" (Italy)
Dario Del Moro, Univ. degli Studi di Roma "Tor Vergata" (Italy)
Vincenzo Greco, Istituto Nazionale di Ottica Applicata - CNR (Italy)
Roberto Piazzesi, Univ. degli Studi di Roma "Tor Vergata" (Italy)
Andrea Sordini, Istituto Nazionale di Ottica Applicata - CNR (Italy)
Marco Stangalini, INAF - Osservatorio Astronomico di Roma (Italy)


Published in SPIE Proceedings Vol. 9147:
Ground-based and Airborne Instrumentation for Astronomy V
Suzanne K. Ramsay; Ian S. McLean; Hideki Takami, Editor(s)

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