Refractometer for self-reference of light source distribution

Abstract

The invention discloses a refractometer for self-reference of light source distribution and belongs to the field of photoelectric technologies and optical instruments. The refractometer comprises a light source illumination system used for generating divergent beams, an optical sensing head, a reflected light energy collecting system and an image acquisition and analysis system, wherein the optical sensing head comprises a reference module and a prism; the reference module is attached to the bottom surface of the prism; during working, light spots formed after divergent beams are shot into the prism are divided into a first part of light beams located in the reference module and a second part of light beams located outside the reference module, the first part of the light beams are completely reflected, part of light from the second part of light beams is reflected, and part of light from the second part of light beams is refracted; the first part of light beams are used for self-reference of light source distribution, and the second part of light beams are used for measuring parameters of a to-be-measured liquid. The technical problems of complicated and tedious acquisition process of reference light in the refractometer, non-real-time acquisition and the like are solved.

Description

technical field [0001] The invention belongs to the field of measurement and photoelectric instruments, and more specifically relates to a photoelectric refractometer, which is used for realizing self-reference of light source distribution and simultaneously realizing various parameter measurements of liquids. Background technique [0002] The relevant parameters such as the density, refractive index and concentration of the liquid are important indicators of the performance of the liquid. There are correlations between these parameters, and they can be converted to each other. The measuring devices of this kind of parameters are widely used in various fields such as national economy and national defense. The refractive index of liquid is an important physical parameter. At present, there are two common methods for measuring the refractive index of liquid, one is the method of geometric optics, and the other is the method of wave optics. [0003] The wave optics method main...

AI Technical Summary

Problems solved by technology

[0006] In view of the above defects or improvement needs of the prior art, the present invention provides a self-referencing refractometer with light source distribution, the purpose of which is to add a reference module with a small refractive index at the contact interface between the optical sensor head and the object to be measured , and make the light spot emitted by the input optical system fall on the reference module and the object under test at the same time, so as to obtain the original light spot as the reference light source and the light spot with the light and dark boundary as the measurement at the same time, thus solving the problem of the reference in the prior art The acquisition process is complicated and cumbersome, and is not applicable to technical problems in actual engineering

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