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

Cheng-Chun Chang; Chien-Chou Chen; Umpei Kurokawa; Byung Il Choi

doi:10.1117/12.886341

12 May 2011 Sensing of FWHM and peak wavelength for LEDs via low-cost filter-array spectrum sensor

Cheng-Chun Chang, Chien-Chou Chen, Umpei Kurokawa, Byung Il Choi

Author Affiliations +

Proceedings Volume 8032, Next-Generation Spectroscopic Technologies IV; 803211 (2011) https://doi.org/10.1117/12.886341
Event: SPIE Defense, Security, and Sensing, 2011, Orlando, Florida, United States

Abstract

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.

Citation Download Citation

Cheng-Chun Chang, Chien-Chou Chen, Umpei Kurokawa, and Byung Il Choi "Sensing of FWHM and peak wavelength for LEDs via low-cost filter-array spectrum sensor", Proc. SPIE 8032, Next-Generation Spectroscopic Technologies IV, 803211 (12 May 2011); https://doi.org/10.1117/12.886341

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