The study demonstrates effects of scanning parameters on correlated colour temperature in LED luminaires, suggesting design improvements for lighting standards.
This article discusses the effect of the scanning resolution and the range of the vertical angle grid on the calculated value of the correlated colour temperature of LED luminaire with different types of distribution curve of luminous intensity. It also touches upon the effects of secondary LED optics on the correlated colour temperature and the spatial non-uniformity of chromaticity of luminaire. A RIGO 801 near-field goniophotometer was used to obtain a data array with the spatial distribution of the irradiance spectral distribution. As a result of the study, it was found that the value of the measurement step in the vertical plane has little effect on the spread of the calculation results, while the range of angles in the vertical plane has a much more significant effect on the calculation results. In addition, it was noted that the use of optics helps to reduce the value of the correlated colour temperature due to the absorption of the short-wave component of the LED radiation and can also lead to an increase in the spatial non-uniformity of chromaticity. The results of the study presented in this article will serve for practical application in the development and improvement of standards regulating the measurement and calculation of colorimetric characteristics of light sources and luminaires, the design of measuring complexes and the creation of lighting projects.
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Abramov et al. (2025) studied this question.
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