Open AccessTomographic imaging of temperature and chemical species based on hyperspectral absorption spectroscopy
Author(s) -
Lin Ma,
Weiwei Cai,
Andrew W. Caswell,
Thilo Kraetschmer,
Scott T. Sanders,
Sukesh Roy,
James R. Gord
Publication year - 2009
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.17.008602
Subject(s) - hyperspectral imaging , chemical imaging , remote sensing , tomography , optics , spectral resolution , imaging spectroscopy , tomographic reconstruction , image resolution , spectroscopy , materials science , projection (relational algebra) , absorption (acoustics) , computer science , environmental science , physics , spectral line , geology , algorithm , quantum mechanics , astronomy
A novel technique has been developed to obtain simultaneous tomographic images of temperature and species concentration based on hyperspectral absorption spectroscopy. The hyperspectral information enables several key advantages when compared to traditional tomography techniques based on limited spectral information. These advantages include a significant reduction in the number of required projection measurements, and an enhanced insensitivity to measurements/inversion uncertainties. These advantages greatly facilitate the practical implementation and application of the tomography technique. This paper reports the development of the technique, and the experimental demonstration of a prototype sensor in a near-adiabatic, atmospheric-pressure laboratory Hencken burner. The spatial and temporal resolution enabled by this new sensing technique is expected to resolve several key issues in practical combustion devices.