Single and multiple transmissions Pankove procedures for measuring spectral refractive indices of slab material from its spectrophotometric measurements
Single and multiple transmissions Pankove procedures for measuring spectral refractive indices of slab material from its spectrophotometric measurements
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单次和多次透射 Pankove 程序，用于通过分光光度测量来测量板材料的光谱折射率
DOI：
10.1117/1.oe.51.7.073604
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发表时间：
2012
影响因子：
1.3
通讯作者：
S. Farag
中科院分区：
文献类型：
--
作者：
El;S. Farag
修正了基于平板界面处单束和多束非相干光束的解析表达式。应用于平面平行平板材料的光谱折射率测定。这些表达式是由Pankove引入的，在光学测量中得到了广泛的应用。然而，一些研究者误用了这些表达式，用平板总反射率代替界面反射率。实验测量了四种不同厚度和成分的玻璃板的折射率，并与制造商提供的折射率进行了比较。这些表达式给出了精确的结果，实验误差约为0.022，在0.2至2.5 um的宽光谱范围内。给出了在单梁和多梁情况下正确使用和误用表达式的比较。根据平板折射率的不同，表达式的误用与参考值产生了约17.6%至24.4%的百分比偏差。©2012中国光学学会
Analytical expressions, based on single and multiple incoherent beams at slab interfaces, are revised. It is applied for determining spectral refractive indices of plane parallel slab material. These expressions were introduced by Pankove and have been widely used in optical measure- ments. However, some researchers misuse these expressions by using the total slab reflectance instead of the interface reflectance. Refractive indices of four glassy slabs with different thicknesses and composition are experimentally measured and compared with that given by the glasses manufacturer. These expressions give precise results with experimental error of about 0.022 across broad spectral range of 0.2 to 2.5 um. Com- parisons between the correct use and misused expressions in case of single and multiple beams are presented. The misuse of expressions pro- duces percentage deviation from the reference values of about 17.6% to 24.4% depending on the slab refractive index. © 2012 Society of Photo-Optical