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Supervised by Ministry of Industry and Information Technology of The People's Republic of China Sponsored by Harbin Institute of Technology Editor-in-chief Yu Zhou ISSNISSN 1005-9113 CNCN 23-1378/T

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A Proposal for an Integrated Model to Evaluate the Circadian Effects of Mesopic Light Sources
Author NameAffiliationPostcode
Weisen Zeng School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, China 510640
Yu Bian* State Key Laboratory of Subtropical Building Science, School of Architecture, South China University of Technology, Guangzhou 510640, China 510640
Abstract:
With the increasing attention on circadian effects driven by light, lighting industry has inspired a revolution of photobiological lighting design. Due to diverse evaluation criteria for visual and non-visual systems, models that combine these evaluation parameters are indeed urgent. Thus, an integrated model for mesopic lighting evaluation of circadian effects was proposed. The circadian efficiency function adopted in this study was synthesized by CIE 1931 XYZ 2 deg color matching functions and standard scotopic sensitivity function. Then, the integrated model composed of International Commission on Illumination 1931 xy chromaticity coordinates, scotopic/photopic ratio, and illuminance could be obtained with synthesized circadian efficiency function. The model showed that for light sources with fixed chromaticity coordinates and fixed illuminance, enhancing the circadian effects is equivalent to increasing the scotopic/photopic ratio, which suggests a useful method for practitioners to explore the photobiologically reasonable spectrum for mesopic lighting. Light-emitting diodes spectra optimized by four-component color-mixing method were employed to figure out the property of the integrated model.
Key words:  circadian effects  mesopic lighting  scotopic/photopic ratio
DOI:10.11916/j.issn.1005-9113.2019021
Clc Number:TU113
Fund:

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