Articolo in rivista, 2023, ENG, 10.3390/s23042269

Compressive Sensing Imaging Spectrometer for UV-Vis Stellar Spectroscopy: Instrumental Concept and Performance Analysis

Nardino, Vanni; Guzzi, Donatella; Lastri, Cinzia; Palombi, Lorenzo; Coluccia, Giulio; Magli, Enrico; Labate, Demetrio; Raimondi, Valentina

CNR; Politecn Torino; Leonardo Co SpA

Compressive sensing (CS) has been proposed as a disruptive approach to developing a novel class of optical instrumentation used in diverse application domains. Thanks to sparsity as an inherent feature of many natural signals, CS allows for the acquisition of the signal in a very compact way, merging acquisition and compression in a single step and, furthermore, offering the capability of using a limited number of detector elements to obtain a reconstructed image with a larger number of pixels. Although the CS paradigm has already been applied in several application domains, from medical diagnostics to microscopy, studies related to space applications are very limited. In this paper, we present and discuss the instrumental concept, optical design, and performances of a CS imaging spectrometer for ultraviolet-visible (UV-Vis) stellar spectroscopy. The instrument-which is pixel-limited in the entire 300 nm-650 nm spectral range-features spectral sampling that ranges from 2.2 nm@300 nm to 22 nm@650 nm, with a total of 50 samples for each spectrum. For data reconstruction quality, the results showed good performance, measured by several quality metrics chosen from those recommended by CCSDS. The designed instrument can achieve compression ratios of 20 or higher without a significant loss of information. A pros and cons analysis of the CS approach is finally carried out, highlighting main differences with respect to a traditional system.

Sensors (Basel) 23 (4)

Keywords

compressive sensing, stellar spectroscopy, spatial light modulator, DMD, imaging spectrometer

CNR authors

Guzzi Donatella, Raimondi Valentina, Palombi Lorenzo, Lastri Cinzia, Nardino Vanni

CNR institutes

IFAC – Istituto di fisica applicata "Nello Carrara"

ID: 482986

Year: 2023

Type: Articolo in rivista

Creation: 2023-06-21 11:31:37.000

Last update: 2023-11-21 22:51:33.000

External links

OAI-PMH: Dublin Core

OAI-PMH: Mods

OAI-PMH: RDF

DOI: 10.3390/s23042269

External IDs

CNR OAI-PMH: oai:it.cnr:prodotti:482986

DOI: 10.3390/s23042269

ISI Web of Science (WOS): 000942108800001