A double-dispersive setup for spatio-spectral scanning in hyperspectral Earth observation

Peter Hinderberger; Sascha Grusche; Martin J. Losekamm

doi:10.1117/12.3031527

20 November 2024 A double-dispersive setup for spatio-spectral scanning in hyperspectral Earth observation

Peter Hinderberger, Sascha Grusche, Martin J. Losekamm

Proceedings Volume 13192, Sensors, Systems, and Next-Generation Satellites XXVIII; 1319218 (2024) https://doi.org/10.1117/12.3031527
Event: Remote Sensing, 2024, Edinburgh, United Kingdom

Conference Poster

Abstract

In satellite-based hyperspectral Earth observation, spatial scanning of a spectrally dispersed one-dimensional field of view is a common approach. Here, the spatial and spectral resolutions of the image acquisition are directly coupled via a slit aperture and cannot be adjusted independently. Spatio-spectral scanning systems, on the other hand, acquire two-dimensional, spectrally coded images with decoupled spatial and spectral resolutions. As an alternative to the use of variable filters in such systems, we investigated an approach based on two dispersion stages and a variable slit. We give a short theoretical overview and present a first experimental validation with a physically doubled Czerny-Turner laboratory setup. We also consider a virtually doubled setup based on a mirrored slit as a compact alternative. Lastly, we discuss benefits, challenges, and possible applications, focusing on SmallSat-based observation.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Peter Hinderberger, Sascha Grusche, and Martin J. Losekamm "A double-dispersive setup for spatio-spectral scanning in hyperspectral Earth observation", Proc. SPIE 13192, Sensors, Systems, and Next-Generation Satellites XXVIII, 1319218 (20 November 2024); https://doi.org/10.1117/12.3031527

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