Food safe monitoring instrument based on space light modulator

Abstract

A food safety monitor based on a spacial light modulator comprises a light source, a sample pool, a detecting part, a dispersive element, an image forming device, a programmable spacial light modulator and a single detector. The sample pool is arranged between the light source and the dispersive element. The light emitting from the light source passes through the sample pool and the detecting part and emits to the dispersive element. The light diffraction route of the dispersive element is provided with the image forming device and the programmable spacial light modulator. A focal plane of the image forming device is also provided with a single detector which obtains the light intensities of various wavelengths or the synthetic light intensity of a plurality of wavelength lights in sequence according to the time sequence, and the monitoring to the sample spectrum is realized with a digital transforming method. The dispersive element of the device adopts a commercial optical disc. The programmable spacial light modulator is a spacial light modulator array based on the MOMES technique. The photoelectric detecting part is only a single detector. The invention has the advantages of low cost, small volume, quick response speed, convenient transportation and the like.

Description

technical field [0001] The invention relates to a food safety monitor, more specifically, the invention relates to a near-infrared spectrum monitor, which can be widely used in food safety monitoring, environmental monitoring, water quality monitoring, air pollution monitoring and other fields. Background technique [0002] In recent years, food safety issues have become increasingly prominent and have attracted more and more social attention. my country, as a developing country in economic transition, coupled with its vast territory and scattered, individual, small-scale or even ultra-small-scale production of agricultural production, has made the quality and safety of agricultural products increasingly prominent. For this reason, for the most critical monitoring technology that affects food safety, the related monitoring methods and equipment are currently a hot research topic, which is urgent and strategic, has great scientific significance and pot...

AI Technical Summary

Problems solved by technology

[0013](1) Except for filter-type spectrometers, they can only be used in fixed-point spot checks with small samples or in laboratories, and are expensive; Excessively single, resulting in the weak status of my country's food safety monitoring

[0014] (2) Foreign technologies are monopolized by patents, which is not conducive to domestic promotion and application

[0015] (3) As the key device in the spectral analysis instrument - the diffraction grating / modulator, the MEMS process of such devices used in the above spectral analysis instrument is relatively complicated

[0016] (4) The linear array detector of the near-infrared spectrum is expensive, which is not conducive to the low cost of the entire monitoring system, and it is difficult to improve the penetration rate of monitoring instruments

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