A high-precision liquid refractive index measuring instrument and its measuring method realized by using the principle of optical fiber white light interference

Abstract

The invention belongs to the technical field of optical fibers, and concretely relates to a high-precision liquid refractive index measurer realized by using fiber white-light interferometry, and a measurement method thereof. The measurer and the measurement method can be widely applied to scientific researches, industrial metering and biomedical detection, and also can be applied to the field of food safety. The measurer is formed by a light source 1, a photoelectric detector 2, a spectrometer 3, a coupler, a PZT modulator 6, a fiber end reflector 7, a fiber collimator 8, a liquid dish 9, a scanning movable mirror 10 and a scanning displacement table 11. The refractive index of every wavelength in a broad-spectrum light source wavelength range can be rapidly measured in a wide spectrum range once without carrying out sample processing on a material to be measured, the measurement system is convenient to adjust, and measurement of the refractive index of a liquid material can be realized.

Description

technical field [0001] The invention belongs to the field of optical fiber technology, and specifically relates to a high-precision liquid refractive index measuring instrument realized by the principle of optical fiber white light interference, which can be widely used in scientific research, industrial measurement and biomedical detection, and can also be applied in the field of food safety. its measurement method. Background technique [0002] Refractive index measurements are important to the properties and applications of various optical materials. Refractive index is an important parameter reflecting the optical properties of transparent media materials. In production and scientific research, it is often necessary to determine the refractive index of some solids and liquids. There are many methods for measuring the refractive index of transparent materials, the minimum deflection angle method and the total reflection method (refractive limit method) are two commonly ...

AI Technical Summary

Problems solved by technology

[0005] However, during the measurement process of this technology, there are problems such as the need for sample processing of the material to be tested, the inconvenience of adjusting the measurement system, and the inability to measure the refractive index of liquid materials. In order to overcome the shortcomings of the prior art, the present invention provides a A device for high-precision measurement of the absolute refractive index of transparent or translucent liquid materials based on an adjustable fiber optic white light Michelson interferometer and published its test implementation method

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