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Proceedings Paper • Open Access

Microbolometer spectrometer opens hoist of new applications
Author(s): J. Leijtens; C. Smorenburg; I. Escudero; E. Boslooper; H. Visser; W. v. Helden; F. Breussin

Paper Abstract

Current Thermal infra red ( 7..14μm) multispectral imager instruments use cryogenically cooled Mercury Cadmium Telluride (MCT or HgCdTe) detectors. This causes the instruments to be bulky, power hungry and expensive.

For systems that have medium NETD (Noise Equivalent Temperature Difference) requirements and can operate with high speed optics (<1.5), room temperature microbolometer performance has increased enough to enable people to design multispectral instruments based on this new detector technology.

Because microbolometer technology has been driven by the military need for inexpensive, reliable and small thermal imagers, microbolometer based detectors are almost exclusively available in 2D format, and performance is still increasing.

Building a spectrometer for the 7 to 12 μm wavelength region using microbolometers has been discarded until now, based on the expected NETD performance.

By optimising the throughput of the optical system, and using the latest improvements in detector performance, TNO TPD has been able to design a spectrometer that is able to provide co-registered measurements in the 7 to 12 μm wavelength region yielding acceptable NETD performance.

Apart from the usual multispectral imaging, the concept can be used for several other applications, among which imaging in both the 3 to 5 and 7 to 12 μm atmospheric windows at the same time (forest fire detection and military recognisance) or wideband flame analysis (Nox detection in industrial ovens).

Paper Details

Date Published: 21 November 2017
PDF: 8 pages
Proc. SPIE 10568, International Conference on Space Optics — ICSO 2004, 105680B (21 November 2017); doi: 10.1117/12.2307992
Show Author Affiliations
J. Leijtens, PD TNO (Netherlands)
C. Smorenburg, PD TNO (Netherlands)
I. Escudero, PD TNO (Netherlands)
E. Boslooper, PD TNO (Netherlands)
H. Visser, PD TNO (Netherlands)
W. v. Helden, PD TNO (Netherlands)
F. Breussin, PD TNO (Netherlands)

Published in SPIE Proceedings Vol. 10568:
International Conference on Space Optics — ICSO 2004
Josiane Costeraste; Errico Armandillo, Editor(s)

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