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

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

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available