ABSTRACT

The lamp spectrum and the surface reflection both contribute to the luminous efficiency of the illuminated object. Hence, it may not be comprehensive to evaluate the luminous efficiency in a lighting environment only through the metrics with respect to lamps. Previous studies have investigated the effect of surface reflection on luminous efficiency, but few quantitative metrics have been proposed so far. In this study, statistical analysis and a validation experiment were conducted to investigate the extent to which the luminous efficacy of radiation (LER) determines the luminous efficiency of a colored surface. The correlation analysis was performed based on an index of the surface spectral reflectance, namely, the spectral reflectance luminous efficacy of radiation (SRLER). The correlation between the SRLER and LER varied with respect to the hues and saturation levels of the colored objects. In particular, highly linear correlations were observed in slightly saturated and highly saturated green, yellow, and purple-blue samples but not in highly saturated reddish samples. This suggests that when the illuminated environment contains a large portion of highly saturated reddish objects, the effectiveness of the LER is dependent on the spectral selectivity of the colored surface. The findings of this study contribute significantly to the comprehensive design of light source spectra and energy saving in actual lighting scenarios.

摘要

灯光谱和表面反射都对被照明物体的发光效率有贡献。因此，仅通过与灯具相关的指标来评估照明环境中的发光效率可能并不全面。以前的研究已经研究了表面反射对发光效率的影响，但迄今为止很少有人提出定量指标。在这项研究中，进行了统计分析和验证实验，以研究辐射的发光效率 (LER) 在多大程度上决定了有色表面的发光效率。基于表面光谱反射率的指标，即辐射的光谱反射率发光效率(SRLER)，进行相关分析。SRLER 和 LER 之间的相关性随着有色物体的色调和饱和度水平而变化。特别是，在轻微饱和和高度饱和的绿色、黄色和紫蓝色样品中观察到高度线性相关，但在高度饱和的微红色样品中没有观察到。这表明当照明环境包含大部分高度饱和的微红色物体时，LER 的有效性取决于有色表面的光谱选择性。本研究结果对实际照明场景中光源光谱的综合设计和节能具有重要意义。和紫蓝色样品，但不是在高度饱和的微红色样品中。这表明当照明环境包含大部分高度饱和的微红色物体时，LER 的有效性取决于有色表面的光谱选择性。本研究结果对实际照明场景中光源光谱的综合设计和节能具有重要意义。和紫蓝色样品，但不是在高度饱和的微红色样品中。这表明当照明环境包含大部分高度饱和的微红色物体时，LER 的有效性取决于有色表面的光谱选择性。本研究结果对实际照明场景中光源光谱的综合设计和节能具有重要意义。