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Optics Express

Optics Express

  • Editor: C. Martijin de Sterke
  • Vol. 15, Iss. 9 — Apr. 30, 2007
  • pp: 5742–5753

Longwave infrared (LWIR) coded aperture dispersive spectrometer

C. Fernandez, B. D. Guenther, M. E. Gehm, D. J. Brady, and M. E. Sullivan  »View Author Affiliations

Optics Express, Vol. 15, Issue 9, pp. 5742-5753 (2007)

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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.

© 2007 Optical Society of America

OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(220.0220) Optical design and fabrication : Optical design and fabrication
(230.0230) Optical devices : Optical devices
(300.6340) Spectroscopy : Spectroscopy, infrared

ToC Category:

Original Manuscript: January 10, 2007
Revised Manuscript: April 20, 2007
Manuscript Accepted: April 23, 2007
Published: April 25, 2007

C. Fernandez, B. D. Guenther, M. E. Gehm, D. J. Brady, and M. E. Sullivan, "Longwave infrared (LWIR) coded aperture dispersive spectrometer," Opt. Express 15, 5742-5753 (2007)

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