Publications [#280318] of David J. Brady
- Fernandez, C; Guenther, BD; Gehm, ME; Brady, DJ; Sullivan, ME, Longwave infrared (LWIR) coded aperture dispersive spectrometer.,
Optics Express, vol. 15 no. 9
pp. 5742-5753, ISSN 1094-4087 [doi]
(last updated on 2019/11/16)
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.