LED Spectrum Measurement via Low Cost Spectrum Sensor On-a-Chip

Chang, Cheng-Chun; Chen, Chien‐Chou; Lin, Nan-Ting; Kurokawa, Umpei; Choi, Byung Il

doi:10.1364/acp.2010.79900b

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2011

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“…For the measurement of LEDs, peak wavelength and full-width-half-maximum (FWHM) are the two important parameters to characterize the spectra of monochromatic LED lights [1]. Recently, spectrometers are increasingly being used for LED measurements.…”

Section: Introductionmentioning

confidence: 99%

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Sensing of FWHM and peak wavelength for LEDs via low-cost filter-array spectrum sensor

Chang

Chen

Kurokawa³

et al. 2011

SPIE Proceedings

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Peak wavelength and full-width-half-maximum (FWHM) are the two important parameters to characterize the spectra of monochromatic LED lights. In this work, a low-cost miniature filter-array spectrum sensor for accurate LED measurement is proposed. For mapping the data from the outputs of the filter-array spectrum sensor to the measurement parameters of peak wavelength and FWHM, Gaussian curves are used as the basis functions to facilitate the estimation.In addition, particle swarm optimization (PSO) is utilized for searching the optimal center locations and the widths of the Gaussian basis functions. The resulting measurement accuracy is competitive to a professional optical spectrometer.

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Section: Introductionmentioning

confidence: 99%

“…In this work, we modify the original PSO by reserving best D particles as the global best positions, namely multiple-objective PSO (MOPSO). For the first half of iterations, we randomly select one of the D global best positions and substitute into the velocity equation, i.e.,( 1) …”

mentioning

confidence: 99%