A Method for Measuring Complex Refractive Index of Liquid Absorbing Medium
A technology of liquid medium and complex refractive index, which is applied in the measurement of phase influence characteristics, etc., can solve the problems of multi-element devices, complex principles, and complex optical paths, and achieve the effect of simple optical path, simple measurement, and fewer components
Active Publication Date: 2020-12-25
XIAMEN UNIV TAN KAH KEE COLLEGE
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[0003] The existing method for measuring the complex refractive index is mainly the polarization technique. The incident linearly polarized light will become elliptically polarized light after being reflected by the absorbing medium. The real part and the imaginary part of the complex refractive index can be determined by measuring the phase and amplitude of the reflected light. The principle is more complicated, more components are needed to complete the measurement, the optical path is more complicated, and the existing instruments are more expensive
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[0022] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0023] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0024] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinatio...
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The invention relates to a method for measuring complex refractive index of a liquid absorption medium, which comprises the following steps of firstly providing a wedge-shaped absorption liquid mediumsample; then making a light source select and inject an appropriate incident point at the medium interface, so that a refracted light finally reaches a set point, and recording the location of the appropriate incident point; finally, calculating the complex refractive index of the liquid to be tested absorption medium according to the principle of time minimum, and the relationship between the real refraction angle of the established wedge-shaped absorption liquid medium and the real and imaginary parts of the complex refractive index of the absorption liquid medium. The invention is simple in measurement and optical path, needs few components, and has low cost of the instrument.
Description
technical field [0001] The invention relates to the field of complex refractive index measurement, in particular to a method for measuring complex refractive index of a liquid absorption medium. Background technique [0002] For the refractive index of the absorbing medium, its value is characterized by the complex refractive index. This change in form changes the properties of the wave, especially the imaginary part of the refractive index, which is not only the source of the absorption properties of the medium, but also affects the polarization state of reflected light and transmitted light. The research on complex refractive index not only has theoretical significance, but also has practical application value. In chemical industry, medicine, food, petroleum and other industrial departments, as well as teaching and experiments in universities, it is often necessary to measure the refractive index of some liquids. In many cases, they are not transparent medium. Therefore,...
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IPC IPC(8): G01N21/41
CPCG01N21/41
Inventor 罗天舒张秋长
Owner XIAMEN UNIV TAN KAH KEE COLLEGE