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Food analyzer based on total reflection refraction method

A technology of total reflection and refraction, which is applied in the direction of color/spectral characteristic measurement, phase influence characteristic measurement, etc. It can solve the problems of inability to measure the refractive index of objects and limit the application range of food analyzers, etc.

Pending Publication Date: 2021-05-18
上海仪电物理光学仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current food analyzers are designed based on the principle of colorimetry, but they can only analyze the composition and content of the sample, and cannot measure the refractive index of the object.
Therefore, the scope of application of food analyzers is limited

Method used

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  • Food analyzer based on total reflection refraction method
  • Food analyzer based on total reflection refraction method
  • Food analyzer based on total reflection refraction method

Examples

Experimental program
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Embodiment

[0022] as attached figure 1 As shown, a food analyzer based on the total reflection refraction method includes a single-wavelength LED light source 1. In this embodiment, the single-wavelength LED light source 1 emits monochromatic light with a wavelength of 589nm. A pinhole plate 2 is installed on the optical path of the monochromatic light emitted by the single-wavelength LED light source 1. In this embodiment, the aperture of the pinhole plate 2 is 0.5 microns. The monochromatic light is diffracted at the small hole of the pinhole plate 2 to form divergent light at a certain angle and enters the high refractive index prism 3, where total reflection occurs at the coupling surface between the high refractive index prism 3 and the measured liquid 4 The total reflection is formed and reflected back to the high refractive index prism 3, and the reflected light is irradiated on the sensitive surface of the linear array CCD acquisition system 8 to form a black and white image; the...

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Abstract

The invention discloses a food analyzer based on a total reflection refraction method, which is characterized in that the food analyzer comprises a single-wavelength LED light source (1), a pinhole plate (2) is installed on a light path of monochromatic light emitted by the single-wavelength LED light source (1), the monochromatic light generates diffracted light at a small hole of the pinhole plate (2) to form divergent light with a certain angle, the divergent light enters a high-refractive-index prism (3), a total reflection effect is generated on a coupling surface of the high-refractive-index prism (3) and the measured liquid (4) to form total reflection light which is reflected back to the high-refractive-index prism (3), and the reflection light irradiates a sensitive surface of a linear array CCD acquisition system (8) to form a black-and-white image. The analyzer can completely achieve the functions of an existing food analyzer, the material refractive index measuring function is added, and the analyzer is simple in structure, high in reliability and low in cost.

Description

technical field [0001] The invention belongs to the technical field of material analysis instruments, and in particular relates to a food analyzer based on a total reflection refraction method. Background technique [0002] The refractive index of liquid is one of the important physical properties of liquid, and the refraction method is one of the commonly used detection methods in food analysis and food safety testing. From the size of the refractive index, it can help to understand the purity of the quality, and the doping situation. With the development of science and technology, the rapid measurement of the refractive index of liquid has been widely used in many fields. [0003] With the development of social economy, the existing hand-held visual refractometers in the field of food analysis are increasingly unable to meet the market demand. At present, a large number of hand-held visual refractometers in the market are simple pure optical instruments. Visually aiming ...

Claims

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Application Information

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IPC IPC(8): G01N21/41G01N21/31
CPCG01N21/31G01N21/41
Inventor 孙流星
Owner 上海仪电物理光学仪器有限公司
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