Device and method for automatically measuring refractive index of liquid

Abstract

The invention provides a device and method for automatically measuring the refractive index of liquid, belongs to the technical field of photoelectric measurement, and aims at solving comprehensive problems of complicated operation, low relative precision, relatively large equipment size, relatively narrow measurement range and the like in the prior art. The device comprises a laser light source,a laser beam expander, a cuvette, an automatic extraction device, a camera, a driving motor, a double-slit plate, a computer and a single-slit plate, wherein a unibeam is emitted from the laser lightsource, is expanded by the laser beam expander, and is projected to the single slit of the single-slit plate to perform Fraunhofer diffraction, the diffracted light is projected to double slits of thedouble-slit plate to perform Young's double-slit interference, and an interference fringe is obtained in a camera; the cuvette is arranged behind the upper single slit of the double-slit plate, is connected with the automatic extraction device, and is used for holding the extracted liquid to be detected; and the automatic extraction device, the camera and the driving motor are connected with thecomputer, and the camera is connected with the driving motor. The device is simple in operation and high in accuracy, and can realize automatic measurement.

Description

technical field [0001] The invention belongs to the technical field of photoelectric measurement, and relates to a device and a method for automatically measuring the refractive index of liquid. Background technique [0002] A liquid refractometer is a device that converts measured optical quantities into digital quantities. It is a convenient device for measuring the refractive index of liquids, and is widely used in chemical, food, pharmaceutical, environmental protection, scientific research and other fields. [0003] As an important parameter to measure the properties of liquids, the refractive index can reflect various properties of substances to a certain extent, and parameters related to it are used in many fields of research and life. In the field of scientific research, the measurement of the refractive index has always been a cumbersome problem, and sometimes a large number of expensive liquid samples have to be measured for the measurement. In the field of cater...

AI Technical Summary

Problems solved by technology

[0005] The present invention provides a new device and method for measuring liquid refraction in order to solve the comprehensive problems of the prior art such as cumbersome operation, low relative precision, large equipment volume and relatively narrow measurement range.

Images