Scientific Results

Optical cavity characterization of the Tor Vergata Fabry-Perot interferometer

Year: 2014

Authors: Giovannelli L., Berrilli F., Del Moro D., Greco V., Piazzesi R., Sordini A., Stangalini M.

Autors Affiliation: Dipartimento di Fisica, Università di Roma Tor Vergata
CNR – Istituto Nazionale di Ottica
INAF – Osservatorio Astronomico di Roma

Abstract: We report the first optical and control performances of the Tor Vergata Fabry-Perot 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 lambda/70 and lambda/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.

Journal/Review: PROCEEDINGS OF SPIE

Volume: 9147      Pages from: 914782-1  to: 914782-8

KeyWords: solar physics; Fabry-Perot Interferometer;
DOI: 10.1117/12.2056477

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