There are some other ways to analyzed the contents of menthol and menthone, such as polarimetry, refraction index method and acetylation method.
薄荷醇和薄荷酮含量的测定方法有旋光测定法、折光指数法及乙酰化法。
参考来源 - 中药薄荷草的化学成分分析研究Refraction index n and extinction coeffient k,which are gained by spectroscopic ellipsometry measurement,both changes with the incidence wavelength.
由椭偏光谱获得了折射率n和消光系数k,两者均随入射波长的变化而变化。
参考来源 - 掺锑二氧化锡薄膜（ATO）的制备及其性质研究They are new type of passive optical components, which are based on the periodical distribution of refraction index in fiber core.
它是利用光纤材料的光敏特性在光纤的纤芯上建立的一种空间周期性折射率分布,其作用在于改变或控制光在该区域的传播行为方式。
参考来源 - 光纤光栅传感系统的研究与实现·2,447,543篇论文数据，部分数据来源于NoteExpress
Nonlinear refraction index change is proportional to square of mean pump power.
非线性折射率与泵浦平均功率的平方成正比。
In this paper the measurement method for the pressure coefficient of optical glass refraction index is offered.
本文给出了光学玻璃折射率压力系数的测量方法。
The theory and method of measuring the refraction index of transp are nt glass-plate with secondary imagery method are introduced.
介绍了用二次成像法测定透明玻璃板折射率的原理和方法。
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