Effectiveness of Light Source Efficiency for Characterization of Colored Surface Luminance

IF 2.6 2区工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY Leukos Pub Date : 2022-07-03 DOI:10.1080/15502724.2021.1951289

Peiyu Wu, Yi Lin, Qi Yao

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Abstract

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.

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光源效率对彩色表面亮度表征的有效性

光源的光谱和表面反射对被照物体的发光效率都有影响。因此，仅通过有关灯具的指标来评价照明环境中的发光效率可能是不全面的。以往的研究已经探讨了表面反射对发光效率的影响，但目前还没有提出定量的度量方法。本研究通过统计分析和验证实验，探讨了辐射发光效率(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指标，即光谱反射率辐射发光效率(SRLER)，进行相关分析。SRLER和LER之间的相关性随着彩色物体的色调和饱和度水平而变化。特别是，在轻度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性，而在高度饱和的红色样品中则没有。这表明，当光照环境中含有很大一部分高度饱和的红色物体时，LER的有效性取决于有色表面的光谱选择性。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。

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来源期刊

Leukos 工程技术-光学

CiteScore

7.60

自引率

5.60%

发文量

审稿时长

>12 weeks

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