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Appl Opt. 2007 Aug 1;46(22):4932-42.

Performance comparison of aperture codes for multimodal, multiplex spectroscopy.

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  • 1Duke University Fitzpatrick Institute for Photonics, Box 90291, Durham, North Carolina 27708, USA.


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.

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