Effect of spectroradiometer characteristics on chromaticity for tricolor laser light sources

摘要

The errors in the output of chromaticity coordinates (u', v') by two spectroradiometers caused by spectral resolution limitations, wavelength variations, and nonlinearity were investigated with three tricolor laser light sources, namely two white light sources and one red light source. Using these sources, we found chromaticity coordinate changes of up to 0.0002 due to a 3.2 nm spectral resolution, 0.0010 due to a 0.6 nm wavelength error, and 0.0091 due to 24% nonlinearity. These chromaticity errors demonstrate that wavelength and nonlinearity calibrations are of great importance when using a spectroradiometer to evaluate the color of a tricolor laser-based light source. Evaluating chromaticity errors due to these spectroradiometer characteristics can help us to obtain accurate color measurements for imaging and display devices based on tricolor laser light sources. (C) 2019 Optical Society of America