Tunable acousto-optic spectral imager for atmospheric composition measurements in the visible spectral domain
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Authors
Dekemper, E.
Loodts, N.
Van Opstal, B.
Maes, J.
Vanhellemont, F.
Mateshvili, N.
Franssens, G.
Pieroux, D.
Bingen, C.
Robert, C.
De Vos, L.
Aballea, L.
Fussen, D.
Discipline
Physical sciences
Subject
Atmospheric composition
Remote sensing
Acousto-optical tunable filter
Average values
Composition measurements
Slant column densities
Spatial resolution
Spectral domains
Spectral imaging
Turbulent plume
Two wavelength
Visible channels
Waste incinerator
Nitrogen oxides
Audience
Scientific
Date
2012Metadata
Show full item recordDescription
We describe a new spectral imaging instrument using a TeO2 acousto-optical tunable filter (AOTF) operating in the visible domain (450–900 nm). It allows for fast (∼1 second), monochromatic (FWHM ranges from 0.6 nm at 450 nm to 3.5 nm at 800 nm) picture acquisition with good spatial resolution. This instrument was designed as a breadboard of the visible channel of a new satellite-borne atmospheric limb spectral imager, named the Atmospheric Limb Tracker for the Investigation of the Upcoming Stratosphere (ALTIUS), that is currently being developed. We tested its remote sensing capabilities by observing the dense, turbulent plume exhausted by a waste incinerator stack at two wavelengths sensitive to NO2. An average value of 6.0±0.4×1017 molecules cm−2 has been obtained for the NO2 slant column density within the plume, close to the stack outlet. Although this result was obtained with a rather low accuracy, it demonstrates the potential of spectral imaging by using AOTFs in remote sensing.
Citation
Dekemper, E.; Loodts, N.; Van Opstal, B.; Maes, J.; Vanhellemont, F.; Mateshvili, N.; Franssens, G.; Pieroux, D.; Bingen, C.; Robert, C.; De Vos, L.; Aballea, L.; Fussen, D. (2012). Tunable acousto-optic spectral imager for atmospheric composition measurements in the visible spectral domain. , Applied Optics, Vol. 51, Issue 25, 6259-6267, DOI: 10.1364/AO.51.006259.Identifiers
scopus: 2-s2.0-84866315905
Type
Article
Peer-Review
Yes
Language
eng