Method for measuring refractive index distribution of transparent medium on basis of interference fringe image processing

A technology of refractive index distribution and interference fringes, which is applied in the field of providing a measurement device for realizing the measurement method, can solve the problems of complicated data processing, long measurement time, and inability to measure the refractive index distribution of non-uniform transparent media.
CN104596989AActive Publication Date: 2015-05-06SICHUAN UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SICHUAN UNIV
Publication Date
2015-05-06

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Abstract

The invention relates to a method for measuring the refractive index distribution of a transparent medium on the basis of interference fringe image processing, and belongs to the technical field of substance refractive index measurements. The method comprises the following steps: generating an interference fringe image by virtue of the beam splitting surface of a three-dimensional beam splitting prism, and then measuring the refractive index distribution of the transparent medium to be measured by calculating the interference fringe movement number generated by changing the difference between an optical path of an input light transmitting the sample to be measured and an optical path of the input light transmitting a reference medium. The invention also provides a measurement device for realizing the measurement method. The measurement method disclosed by the invention is capable of measuring the refractive index of a uniform transparent medium with higher accuracy, and measuring the refractive index distribution of a non-uniform transparent medium. The measurement method and the measurement device thereof disclosed by the invention further have the advantages of reducing measurement times, shortening measurement time and simplifying data processing on the premise of ensuring measurement accuracy and stability.
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Description

technical field

[0001] The invention belongs to the technical field of material refractive index measurement, in particular to a method for measuring the refractive index distribution of a transparent medium based on interference fringe image processing, and provides a measuring device for realizing the measurement method. Background technique

[0002] As the basic physical quantity that characterizes the properties of matter, the refractive index reflects a lot of information inside the matter. It is often used in engineering fields such as optics, chemistry, new material synthesis, and material identification, as well as in scientific research. The precise measurement of the refractive index is widely used in industrial applications. Significance.

[0003] There are many methods for measuring the refractive index of materials, and the automatic and high-precision measurement of the refractive index of materials has always been the goal pursued by researchers. Among the va...

Claims

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