Performance comparison of aperture codes for multimodal, multiplex spectroscopy

Ashwin A. Wagadarikar, Michael E. Gehm, David J. Brady

Research output: Contribution to journalArticlepeer-review

36 Scopus citations


We experimentally evaluate diverse static independent column codes in a coded aperture spectrometer. The performance of each code is evaluated based on the signal-to-noise ratio (SNR), defined as the peak value in the spectrum to the standard deviation of the background noise, as a function of subpixel vertical misalignments. Among the code families tested, an S-matrix-based code produces spectral reconstructions with the highest SNR. The SNR is least sensitive to vertical subpixel misalignments on the detector with a Hadamard-matrix-based code. Finally, the increased sensitivity of a spectrometer using a coded aperture instead of a slit is demonstrated.

Original languageEnglish (US)
Pages (from-to)4932-4942
Number of pages11
JournalApplied optics
Issue number22
StatePublished - Aug 1 2007
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


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