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 journalArticlepeer-review

23 Scopus citations


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 languageEnglish (US)
Pages (from-to)5742-5753
Number of pages12
JournalOptics Express
Issue number9
StatePublished - Apr 30 2007
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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