光源光谱对标志逆反射系数的影响

发布时间：2018-12-21 11:14

【摘要】：以光源发射光谱和逆反射材料光谱反射率曲线为基础,通过数据拟合的方式研究了多种光源照射条件下材料逆反射系数的相对关系及其变化趋势。在已有标准A光源测试系统基础上,分别测试氙灯、卤素灯、不同色温白光LED光源发射光谱和红、黄、白、绿、蓝五种逆反射材料的光谱反射率曲线,并通过拟合计算得到同一材料在不同光源照射条件下的相对逆反射系数修正因子。分析结果表明,在可见光范围内具有连续光谱反射率曲线分布的白色材料逆反射系数数值受入射光源光谱变化较小,而单色材料逆反射系数受入射光源光谱差异影响较大,且呈现不同的变化趋势:以卤素光源入射条件下材料逆反射系数测试结果为基础值,不同色温的白光LED、氙灯光源对红色和黄色材料逆反射系数具有正增益效果,且随着光源色温的升高,红色和黄色材料逆反射系数呈下降趋势,降幅最高分别达到47.7%和4.9%;绿色和蓝色材料逆反射系数呈上升趋势,涨幅最高达到16.5%和28.9%。
[Abstract]:Based on the spectral reflectance curves of light source and backreflection material, the relative relation and variation trend of material inverse reflectance under various light sources were studied by data fitting. Based on the standard A light source test system, the spectral reflectance curves of xenon lamp, halogen lamp, white LED light source with different color temperature, red, yellow, white, green and blue were measured respectively. The correction factor of the relative inverse reflection coefficient of the same material under different irradiation conditions was obtained by fitting calculation. The results show that the inverse reflectance of white materials with continuous spectral reflectivity distribution in the visible range is slightly affected by the spectral variation of the incident light source, while the inverse reflection coefficient of the monochromatic material is greatly affected by the spectral difference of the incident light source. Based on the measured results of material inverse reflection coefficient under the incident condition of halogen source, the white LED, xenon lamp with different color temperature has a positive gain effect on the inverse reflection coefficient of red and yellow materials. With the increase of the color temperature of the light source, the inverse reflection coefficient of the red and yellow materials showed a downward trend, with the highest decrease of 47.7% and 4.9%, respectively. The inverse reflectance of green and blue materials showed an upward trend, with the highest increase of 16.5% and 28.9%.
【作者单位】：交通运输部公路科学研究院;公路交通安全技术交通行业重点实验室;河北大学物理科学与技术学院;
【基金】：国家自然科学基金项目(61104161,61205180)资助
【分类号】：U491.52

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