Simulation of Light Efficiency for Aged People and Data-Analysis of an Optimal Illuminance with Aging Models of the Human Lens
Simulation of Light Efficiency for Aged People and Data-Analysis of an Optimal Illuminance with Aging Models of the Human Lens
复制标题
老年人光效模拟和人体晶状体老化模型最佳照度的数据分析
DOI：
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发表时间：
1998
期刊：
影响因子：
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通讯作者：
M. Iwata
中科院分区：
文献类型：
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作者：
K. Okajima;M. Iwata
我们用人类晶状体的老化模型推导出眼睛光谱透过率与年龄的函数关系，并计算了D65、D50和A灯的视网膜照度随年龄的变化。结果表明，70岁老人A光的视网膜照度约为22岁老人的0.75倍，D65光的放大系数低至0.72。此外，我们还进行了一项实验，以测量年轻人和老年人在两种荧光灯条件下(日光和白炽灯颜色)阅读报纸的最佳照度。结果表明，老年被试在阅读任务中需要的照度比青年被试高。通过对人体晶状体老化模型的分析，可以解释实验结果中青年和老年受试者差异的趋势。我们相信，我们的研究方法将有助于制定一个关于老年人舒适照明环境的实用标准。
We derived ocular spectral transmittances as a function of age with aging models of the human lens and calculated the age-related change in retinal illuminance of D65, D50, and A-lights. The results show that the retinal illuminance of A-light for a 70-year-old person decreases to approximately 0.75 times that for a 22-year-old, and that the magnification factor in the case of D65-light is as low as 0.72. In addition, we conducted an experiment to measure the optimal illuminance for reading a newspaper under two kinds of fluorescent lamp condition (daylight and incandescence colors) for young and aged subjects. The results indicate that aged subjects needed higher illuminance for the reading task than young subjects. We demonstrate that the analysis with aging models of the human lens can explain the tendency of the difference between young and aged subjects in the experimental results. We believe that our approach in the present study will be useful for making a practical standard concerning comfortable illumination environment for aged people.