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Method for measuring complex refractive index of absorbing medium based on real refraction angle method

A complex refractive index and measurement method technology, which is applied in the field of complex refractive index measurement of absorptive media, can solve problems such as multiple devices, complex optical paths, and complex principles, and achieve the effects of simple optical path, accurate results, and low cost

Inactive Publication Date: 2017-03-15
XIAMEN UNIV TAN KAH KEE COLLEGE
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Problems solved by technology

[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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  • Method for measuring complex refractive index of absorbing medium based on real refraction angle method
  • Method for measuring complex refractive index of absorbing medium based on real refraction angle method
  • Method for measuring complex refractive index of absorbing medium based on real refraction angle method

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0038] This embodiment provides a method for measuring the complex refractive index of an absorptive medium based on the real refraction angle method, which specifically includes the following steps:

[0039] Step S1: if figure 1 As shown, a uniform light wave, as the incident light, is vertically incident on a vertical boundary surface (interface 1) of a wedge-shaped absorbing medium with a vertex angle θ from air, at this time, the equivalent of the light wave refracted into the absorbing medium is The breadth and isophase planes are parallel to each other;

[0040] Step S2: The incident light is refracted through an oblique boundary surface (interface 2) of the absorptive medium, and the phase vector and attenuation wavevector of the light wave in the absorptive medium have a tangential direction on the oblique boundary surface. Component, the ligh...

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Abstract

The invention relates to a method for measuring the complex refractive index of an absorbing medium based on a real refraction angle method. The method specifically includes the following steps that S1, a uniform light wave serves as incident light to vertically enter a vertical side interface of the absorbing medium with wedge-shaped vortex angles in an incident mode through air; S2, the incident light is refracted through a bevel edge interface of the absorbing medium, and the relation between real refraction angles and the complex refractive index of the absorbing medium is established; S3, the uniform light vertically enters the absorbing medium with the wedge-shaped vortex angles defined in the specification from the vertical side interface, and the real refraction angles defined in the specification generated after refraction of the bevel edge interface of the absorbing medium are measured; S4, in combination with the relation, between the real refraction angles and the complex refractive index of the absorbing medium, established in S2 and according to the real refraction angles measured in S3, a real portion and an imagery portion of the absorbing medium are calculated. A light path adopted for the method is simple, the reliability of the calculated result is high, and a made instrument is low in cost.

Description

technical field [0001] The invention relates to the technical fields of complex refractive index measurement and optical measurement, in particular to a method for measuring complex refractive index of an absorbing medium based on a real refraction angle method. Background technique [0002] For the refractive index of an 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. [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 bei...

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Application Information

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IPC IPC(8): G01N21/41
CPCG01N21/41
Inventor 张秋长
Owner XIAMEN UNIV TAN KAH KEE COLLEGE
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