On the estimation of target spectrum for filter-array based spectrometers.
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.
Chang
Cheng-Chun
CC
Electrical and Computer Engineering, University of Pittsburgh, Pittsburgh PA, USA. chc55@pitt.edu
Lee
Heung-No
HN
D000465:Algorithms; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005374:Filtration / Q000295:instrumentation* / Q000379:methods; D046228:Microarray Analysis / Q000295:instrumentation* / Q000379:methods; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013057:Spectrum Analysis / Q000295:instrumentation* / Q000379:methods