On the estimation of target spectrum for filter-array based spectrometers - PubMed (original) (raw)
. 2008 Jan 21;16(2):1056-61.
doi: 10.1364/oe.16.001056.
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- PMID: 18542178
- DOI: 10.1364/oe.16.001056
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On the estimation of target spectrum for filter-array based spectrometers
Cheng-Chun Chang et al. Opt Express. 2008.
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Abstract
Miniature spectrometers have been drawn researchers much attention due to its wide variety of possible applications. In this paper, we show the achievability of a fine spectrometer on-a-chip based on a low-performance, low-cost filter-array. A low quality filter-array is augmented with digital signal processing techniques. A series of estimators for recovering target spectrum is introduced. By exploiting non-negative nature of spectral content, a non-negative least-square algorithm is found particularly useful for spectrum recovery. The concept is verified in a hardware implementation.
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