Abstract
Traditional integral colorimeters use tungsten-halogen or xenon lamps for illumination, as well as
correcting filters to make the instrument's spectral response meet the Luther condition. This structure causes
the instruments to have relatively higher error and poor repeatability. Thus, this letter proposes a new
measurement design that uses compound LEDs as the instrument's measurement light source. The new design
adjusts the instrument's spectral response by modifying the spectra of the compound LEDs. A compound LED light
source is designed for integral colorimeters, and an experiment is conducted to evaluate the performance of
the integral colorimeter. Experiments show that the design effectively reduces the error of integral
colorimeters.
© 2014 Chinese Optics Letters
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