脂肪乳液中物质浓度的光学低相干干涉测量

发布时间：2018-05-08 00:34

本文选题：非接触测量 + 广义惠更斯菲涅耳原理　；参考：《纳米技术与精密工程》2014年02期

【摘要】：为了实现对散射介质的非接触测量,有效地提高灵敏度,提出了光学低相干干涉测量方法.采用光纤型迈克尔逊干涉结构,增加了扫描延迟线和光学外差探测电路,实现了具有光程分辨能力的干涉测量.以脂肪乳剂Intralipid为样本,通过稀释和加入染色剂的方法改变其散射和吸收特性.通过对溶液内反射信号的干涉测量和曲线拟合,研究了光程相关的干涉光信号与物质浓度的依赖关系.实验对象为散射和吸收特性相对稳定的脂肪乳剂和印度墨水混合物,其中Intralipid乳剂浓度在4%~16%之间,印度墨水浓度在0~1%之间.拟合方法引用了广义惠更斯菲涅耳(EHF)模型的解析表达式,拟合相关系数在0.98以上.实验结果与积分球测量结果进行了比较,初步验证了理论方法的可行性.
[Abstract]:In order to realize the non-contact measurement of scattering medium and improve the sensitivity effectively, a method of optical low coherence interferometry is proposed. The optical fiber Michelson interference structure is used, scanning delay line and optical heterodyne detection circuit are added to realize the interference measurement with optical path resolution. The scattering and absorption properties of fat emulsion Intralipid were changed by diluting and adding dye. The dependence of the optical path related interference signal on the concentration of matter was studied by measuring the reflected signal in solution and fitting the curve. The mixture of fat emulsion and Indian ink with relatively stable scattering and absorption properties was studied. The concentration of Intralipid emulsion was between 4 and 16%, and the concentration of Indian ink was between 0 and 1%. The analytic expression of the generalized Huygens Fresnel EHF model is used in the fitting method. The fitting correlation coefficient is above 0.98. The experimental results are compared with the results of the integral sphere measurement, and the feasibility of the theoretical method is preliminarily verified.
【作者单位】：广东医学院信息工程学院;东莞理工学院电子工程学院;暨南大学理工学院;
【基金】：国家自然科学基金资助项目(61008057) 东莞市科技计划资助项目(2012108102001,2012108102006)
【分类号】：R318.51

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