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Determination of Kubelka-Munk scattering and absorption coefficients by diffuse illumination

机译:漫射照明确定Kubelka-Munk散射和吸收系数

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摘要

The Kubelka-Munk theory, although it provides an equation that relates the reflection of a sample under diffuse illumination to certain of its properties, does not take boundary reflectance into account. Boundary reflection is always present because there is always a difference between the refractive indices of the sample and of the surrounding medium. We describe how a half-sphere is used to achieve diffuse illumination, and we present and exemplify equations that correct for boundary reflection with measurements of four composite restorative dental materials. The refractive index of the sample is measured with a matching technique that employs a glycerol-water mixture. Edge loss errors are estimated.
机译:Kubelka-Munk理论虽然提供了将样品在漫射照明下的反射与其某些特性相关的方程,但并未考虑边界反射率。由于样品和周围介质的折射率之间始终存在差异,因此始终存在边界反射。我们描述了如何使用半球体来实现漫射照明,并提出并举例说明了通过测量四种复合修复性牙科材料来校正边界反射的方程式。样品的折射率通过采用甘油-水混合物的匹配技术进行测量。估计边缘损失误差。

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