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Circadian metric - Computation of circadian stimulus using illuminance, correlated colour temperature and colour rendering index

机译：昼夜公制 - 使用照度，相关色温和显色指数计算昼夜刺激

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摘要

The circadian rhythm is influenced by light and other non-visual responses in humans. Recent researches have shown that the visual quantity illuminance is not appropriate for evaluating non-visual effects. Metrics such as the circadian stimulus have been developed to address this issue. One of the limitations with circadian metrics is that the determination requires a spectroradiometer instead of the standard illuminance meters. In this article, a simple circadian stimulus calculation model for white light sources is presented. The model is determined with the parameters illuminance, correlated colour temperature CCT and colour rendering index R-a. The accuracy and reliability of the model is high and is based on 7641 spectra with 19 illuminance levels, which are generated using a heuristic optimisation procedure. In addition, the model has been internally validated with the method repeated-split-data and has an error deviation of 0.058 for CCT 3710 K and 0.045 for CCT = 3710 K at 99% confidence interval in the circadian stimulus CS range between 0.2 and 0.5. Since the quantities illuminance, correlated temperature and colour rendering index are common in practice, this model enables non-visual planning of illumination installations by lighting designers or lighting design tools. Furthermore, it allows retrospective analysis of past non-visual research results in scientific studies, where illuminance and correlated colour temperature were provided.
机译：昼夜节律受到人类中的光和其他非视觉反应的影响。最近的研究表明，视觉量照明不适用于评估非视觉效果。已经制定了昼夜刺激等度量来解决这个问题。昼夜节目指标的局限之一是确定需要光谱仪代替标准照度计。在本文中，提出了一种用于白光源的简单昼夜刺激计算模型。使用参数照度，相关色温CCT和显色指数R-A确定该模型。模型的精度和可靠性高，基于7641光谱，具有19个照度水平，使用启发式优化过程产生。此外，该模型已经在内部验证了该方法重复分裂数据，并且对于CCT> 3710k的误差偏差为0.058，对于CCT <= 3710K，在昼夜刺激CS范围内的99％置信区间为0.2和0.5。由于数量照度，相关温度和显色指数在实践中是常见的，因此该模型通过照明设计人员或照明设计工具来实现照明装置的非视视觉规划。此外，它允许对科学研究的过去的非视觉研究的回顾性分析，提供照度和相关色温。

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