A static, refractive and monolithic Fourier spectrometer for an HEMERA balloon flight

A static, refractive and monolithic Fourier spectrometer for an HEMERA balloon flight

Fabio Frassettoa, Lorenzo Cocolab, Paola Zuppella, Vania Da Deppo, Riccardo Claudi, Luca Poletto

Abstract. In this work we present the characteristics of a static Fourier transform spectrometer designed for a balloon flight and meant to test the instrument in an actual working environment. The flight campaign has been provided within the HEMERA Research Infrastructure. The interferometric assembly, the core of the instrument, is made with only refractive and reflective surfaces, without diffraction gratings. It is realized with four glass elements that are glued in a single monolithic structure with no spacers or framed supports. There are no hollow spaces, thus improving the mechanical stiffness. The spectral band accessible to the presented optical design is 450 – 850 nm and the working spectral region can be chosen to be either 550 – 850 nm or 450 – 550 nm. The spectral resolution is variable as it is driven by the refractive index of the used glasses in the considered spectral region. In this design, the resolution varies from 1500 at 550 nm to 200 at 800 nm and to 4000 at 450 nm. The total field of view of the instrument is 3 degrees. All the optical elements used to operate the spectrometer are installed on a 3D printed structure. This is possible due to the low sensitivity of the instrument to vibrations. The interferometric assembly has undergone thermal test to quantify the temperature range it can tolerate. We will present the instrument design and the first results of the flight campaign.

Keywords
Fourier Transform Spectroscopy, Space Instruments, Interferometry

Published online 11/1/2023, 4 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Fabio Frassettoa, Lorenzo Cocolab, Paola Zuppella, Vania Da Deppo, Riccardo Claudi, Luca Poletto, A static, refractive and monolithic Fourier spectrometer for an HEMERA balloon flight, Materials Research Proceedings, Vol. 37, pp 270-273, 2023

DOI: https://doi.org/10.21741/9781644902813-59

The article was published as article 59 of the book Aeronautics and Astronautics

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

References
[1] J. M. Harlander, Spatial Heterodyne Spectroscopy: Interferometric Performance at any Wavelength Without Scanning, Thesis (Ph.D.) University of Wisconsin, Madison, 1991, https://ui.adsabs.harvard.edu/abs/1991PhDT……..62H
[2] J. Harlander, F. Roesler, J. Cardon, C. Englert and R. Conway, Shimmer: a spatial heterodyne spectrometer for remote sensing of Earth’ middle atmosphere, Appl. Opt. 41, 1343-1352 (2002). https://doi.org/10.1364/AO.41.001343
[3] M. Kaufmann, F. Olschewski, K. Mantel, B. Solheim, G. Shepherd, M. Deiml, J. Liu, R. Song, Q. Chen, O. Wroblowski, D. Wei, Y. Zhu, F. Wagner, F. Loosen, D. Froehlich, T. Neubert, H. Rongen, P. Knieling, P. Toumpas, J. Shan, G. Tang, R. Koppmann and M. Riese, A highly miniaturized satellite payload based on a spatial heterodyne spectrometer for atmospheric temperature measurements in the mesosphere and lower thermosphere, Atmos. Meas. Tech., 11, 3861–3870. https://doi.org/10.5194/amt-11-3861-2018
[4] F. Frassetto, L. Cocola, V. Da Deppo, L. Poletto and P. Zuppella, High signal-to-noise ratio spectrometer based on static Fourier transform interferometer (for hemera balloon flight), Italian Association of Aeronautics and Astronautics, XXV International Congress, 9-12 September 2019, Rome, Italy
[5] F. Frassetto, L. Cocola, R. Claudi, V. Da Deppo, P. Zuppella and L. Poletto, Low noise Fourier transform spectrometer for a balloon borne platform, Italian Association of Aeronautics and Astronautics, XXVI International Congress, 31 August -3 September 2021, Pisa, Italy. https://doi.org/10.5194/egusphere-egu22-11428
[6] F. Frassetto, L. Cocola, P. Zuppella, V. Da Deppo and L. Poletto, High sensitivity static Fourier transform spectrometer, Opt. Express 29, 15906-15917 (2021). https://doi.org/10.1364/OE.422645
[7] F. Frassetto, L. Cocola, R. Claudi, V. Da Deppo, P. Zuppella and L. Poletto, Report on a refractive static Fourier transform spectrometer flown on a stratospheric balloon for the HEMERA program, ICSO International Conference on Space Optics 3-7 October 2022, Dubrovnik, Croatia. https://doi.org/10.5194/egusphere-egu22-11428