Accurate Sensing of LED Spectra via Low-Cost Spectrum Sensors

As a variety of light-emitting diode (LED) applications rapidly develops, accurate specifications of LED characteristics are increasingly important. In this work, we present a method for accurate measurement of LED spectra using a novel low-cost filter-array spectrum sensor. The measurement accuracy is further enhanced using particle swarm optimization. As a result, the proposed sensing method not only matches the performance of a professional optical spectrometer, but also is suitable for low-cost consumer applications, wherever the precise spectrum (or color) measurement is demanded.