A multispectral polarimetric instrument concept based on metasurface filters

Tiberiu Ceccotti; Benjamin Brenny; Giampiero Gerini; Martijn Brouwer; Jérôme Caron; Nurcan Aplay Koç; Anton Leemhuis

doi:10.1117/12.2680292

19 October 2023 A multispectral polarimetric instrument concept based on metasurface filters

Tiberiu Ceccotti, Benjamin Brenny, Giampiero Gerini, Martijn Brouwer, Jérôme Caron, Nurcan Aplay Koç, Anton Leemhuis

Proceedings Volume 12729, Sensors, Systems, and Next-Generation Satellites XXVII; 127290X (2023) https://doi.org/10.1117/12.2680292
Event: SPIE Remote Sensing, 2023, Amsterdam, Netherlands

Abstract

Remote sensing of aerosols requires spectropolarimetric information over different viewing angles with demanding polarimetric accuracy and growing interest for smaller designs. In this paper, we investigate an instrument design that implements a metasurface filter which enables both functions simultaneously, allowing further miniaturization and integrability. The instrument offers 1 km ground sampling distance over its entire field of view, in Low Earth Orbit, and the concept makes use of six modules to cover the wide field of view requested for aerosol retrieval with a total of seven radiation-resistant lenses. This choice enables an optical volume per module under 50mm × 50mm × 150mm and smaller relative angles of incidence. The filters are designed to cover six spectral bands from 443 nm to 870 nm with a spectral resolution of 2 nm to 5 nm. The wide spectral band is achieved by using three distributed Bragg reflectors with bandpass filters, integrated in one double-cavity structure that can be glued on a CCD/CMOS sensor. The two cavities, operating as a metasurface, contain scatterers of different dimensions enabling the fine-tuning of the spectral resonance and the polarization filtering. Multiscale forward modeling techniques are employed for the estimation of the polarimetric accuracy with optical aberrations and realistic coatings. Using radiance values from the PACE mission, polarimetric errors and SNR at each pixel are estimated and compared to requirements of state-of-the-art missions.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Tiberiu Ceccotti, Benjamin Brenny, Giampiero Gerini, Martijn Brouwer, Jérôme Caron, Nurcan Aplay Koç, and Anton Leemhuis "A multispectral polarimetric instrument concept based on metasurface filters", Proc. SPIE 12729, Sensors, Systems, and Next-Generation Satellites XXVII, 127290X (19 October 2023); https://doi.org/10.1117/12.2680292

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