Longwave infrared (LWIR) coded aperture dispersive spectrometer.

TitleLongwave infrared (LWIR) coded aperture dispersive spectrometer.
Publication TypeJournal Article
Year of Publication2007
AuthorsC Fernandez, BD Guenther, ME Gehm, DJ Brady, and ME Sullivan
JournalOptics Express
Volume15
Start Page5742
Issue9
Pagination5742 - 5753
Date Published04/2007
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 CO(2) laser are demonstrated.

DOI10.1364/oe.15.005742
Short TitleOptics Express