Longwave infrared (LWIR) coded aperture dispersive spectrometer

C. Fernandez; B. D. Guenther; M. E. Gehm; D. J. Brady; M. E. Sullivan

doi:10.1364/OE.15.005742

Longwave infrared (LWIR) coded aperture dispersive spectrometer

C. Fernandez, B. D. Guenther, M. E. Gehm, D. J. Brady, M. E. Sullivan

Research output: Contribution to journal › Article › peer-review

27 Scopus citations

Abstract

We describe a static aperture-coded, dispersive longwave infrared (LWIR) spectrometer that uses a microbolometer array at the detector plane. The two-dimensional aperture code is based on a row-doubled Hadamard mask with transmissive and opaque openings. The independent column code nature of the matrix makes for a mathematically well-defined pattern that spatially and spectrally maps the source information to the detector plane. Post-processing techniques on the data provide spectral estimates of the source. Comparative experimental results between a slit and coded aperture for emission spectroscopy from a CO₂ laser are demonstrated.

Original language	English (US)
Pages (from-to)	5742-5753
Number of pages	12
Journal	Optics Express
Volume	15
Issue number	9
DOIs	https://doi.org/10.1364/OE.15.005742
State	Published - Apr 30 2007
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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10.1364/OE.15.005742

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AU - Guenther, B. D.

AU - Gehm, M. E.

AU - Brady, D. J.

AU - Sullivan, M. E.

PY - 2007/4/30

Y1 - 2007/4/30

N2 - We describe a static aperture-coded, dispersive longwave infrared (LWIR) spectrometer that uses a microbolometer array at the detector plane. The two-dimensional aperture code is based on a row-doubled Hadamard mask with transmissive and opaque openings. The independent column code nature of the matrix makes for a mathematically well-defined pattern that spatially and spectrally maps the source information to the detector plane. Post-processing techniques on the data provide spectral estimates of the source. Comparative experimental results between a slit and coded aperture for emission spectroscopy from a CO2 laser are demonstrated.

AB - We describe a static aperture-coded, dispersive longwave infrared (LWIR) spectrometer that uses a microbolometer array at the detector plane. The two-dimensional aperture code is based on a row-doubled Hadamard mask with transmissive and opaque openings. The independent column code nature of the matrix makes for a mathematically well-defined pattern that spatially and spectrally maps the source information to the detector plane. Post-processing techniques on the data provide spectral estimates of the source. Comparative experimental results between a slit and coded aperture for emission spectroscopy from a CO2 laser are demonstrated.

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Longwave infrared (LWIR) coded aperture dispersive spectrometer

Abstract

ASJC Scopus subject areas

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