title: Longwave infrared (LWIR) coded aperture dispersive spectrometer.
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.
authors.forename: C
authors.initials: C
authors.lastname: Fernandez
authors.forename: B D
authors.initials: BD
authors.lastname: Guenther
authors.forename: M E
authors.initials: ME
authors.lastname: Gehm
authors.forename: D J
authors.initials: DJ
authors.lastname: Brady
authors.forename: M E
authors.initials: ME
authors.lastname: Sullivan