HeNe-laser light scattering by human dental enamel
HeNe-laser light scattering by human dental enamel
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DOI：
10.1177/00220345950740121301
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发表时间：
1995-12-01
影响因子：
7.6
通讯作者：
Groenhuis, RAJ
中科院分区：
文献类型：
--
作者：
Zijp, JR;tenBosch, JJ;Groenhuis, RAJ
了解牙釉质的光学特性并了解这些特性的起源对于开发用于龋齿诊断和牙齿颜色测量的新光学方法是必要的。我们测量了 80 至 100 微米厚的人类牙釉质板的氦氖激光的散射强度函数。 633 nm 处的不对称系数计算为 g = 0.68。通过测量准直光束的衰减，我们确定散射系数为s = 6.6 mm(-1)。根据激光束透射获得的夫琅和费衍射图案，我们计算出棱柱结构的周期性为 5.4 μm。我们提出了一个包含晶体和棱镜散射的模型。它表明棱镜是最重要的散射体，但晶体负责反向散射。
Knowledge of the optical properties of tooth enamel and an understanding of the origin of these properties are necessary for the development of new optical methods for caries diagnosis and the measurement of tooth color. We measured the scattering intensity functions for HeNe-laser light of 80- to 100-mu m-thick human dental enamel slabs. The asymmetry factors were calculated to be g = 0.68 at 633 nm. By measuring the collimated beam attenuation, we determined the scattering coefficient to be s = 6.6 mm(-1). From Fraunhofer diffraction patterns, obtained from transmission of the laser beam, we calculated the periodicity of the prismatic structure as 5.4 mu m. We present a model containing scattering by crystals and by prisms. It shows that the prisms are the most important scatterers but that the crystals are responsible for the back-scattering.