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Proceedings Paper

Rapid hyperspectral imaging in the mid-infrared
Author(s): N. Kröger; A. Egl; M. Engel; N. Gretz; K. Haase; I. Herpich; S. Neudecker; A. Pucci; A. Schönhals; W. Petrich
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Paper Abstract

Despite the successes of mid-infrared hyperspectral imaging in a research environment, progress in the migration of technology into the day-to-day clinical application is slow. Clinical acceptance may be improved if the spectroscopy would be faster and the infrared microscopes available at lower cost. Here we present first results of a fast, multi-scale mid-infrared microscopy setup which allows for the investigation of 10.6×11.7 mm2 and 2.8×3.1mm2 fields of view with a resolution of 23.0±3.5 μm and 9.4±1.8 μm, respectively. Tunable quantum cascade lasers in the wavenumber ranges of 1030-1090 cm-1 and 1160-1320 cm-1 serve as light sources. A vapor cell is used as a frequency reference during the rapid scanning. As far as the imaging is concerned, it is the high spectral power density of the quantum cascade laser which enables the use of a microbolometer array while still obtaining reasonable signal-to-noise ratios on each pixel. Hyperspectral images are taken in times which can be as low as 52s for the overall image acquisition including referencing.

Paper Details

Date Published: 4 March 2014
PDF: 7 pages
Proc. SPIE 8939, Biomedical Vibrational Spectroscopy VI: Advances in Research and Industry, 89390Z (4 March 2014); doi: 10.1117/12.2041988
Show Author Affiliations
N. Kröger, Univ. of Heidelberg (Germany)
A. Egl, Univ. of Heidelberg (Germany)
M. Engel, Univ. of Heidelberg (Germany)
N. Gretz, Univ. of Heidelberg (Germany)
K. Haase, Univ. of Heidelberg (Germany)
I. Herpich, Univ. of Heidelberg (Germany)
S. Neudecker, Univ. of Heidelberg (Germany)
A. Pucci, Univ. of Heidelberg (Germany)
A. Schönhals, Univ. of Heidelberg (Germany)
W. Petrich, Univ. of Heidelberg (Germany)

Published in SPIE Proceedings Vol. 8939:
Biomedical Vibrational Spectroscopy VI: Advances in Research and Industry
Anita Mahadevan-Jansen; Wolfgang Petrich, Editor(s)

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