Multi-grating programmable full color spectrometer and monitoring method facing to foodstuff safety monitoring

Abstract

The invention relates to a multi-grating programmable panchromatic spectrometer aiming at monitoring the safety of foodstuff, comprising a light source, a sample pool, a detection part, dispersing components, an imaging device, a programmable spatial light modulator area array and a plurality of detectors aiming at different wavebands, wherein, light emitted by the light source passes through the sample pool and is reflected to the dispersing components; the light with different wavelengths is reflected to the programmable spatial light modulator area array by various dispersing components with different parameters; the programmable spatial light modulator area array is modulated through exertion of slaving voltage, and then a plurality of subsequently arranged single detectors respectively obtain the optical intensity of various wavelengths or the synthetic optical intensity of light with a plurality of wavelengths in turn according to the time sequence; finally, monitoring of spectra is realized by utilization of the digital conversion method. The dispersing components of the instrument adopt gratings or commercial compact discs and so on; the programmable spatial light modulator area array is a spatial light modulator area array based on MOMES technology; photoelectric detecting parts are a plurality of detectors aiming at different wavebands. The multi-grating programmable panchromatic spectrometer has the advantages of low cost, small volume, quick response speed, portable use, capability of realizing full spectrum detection and so on.

Description

technical field [0001] The invention relates to the technical field of instrument analysis, in particular, the invention relates to a multi-grating programmable full-color spectrum monitoring system for food safety monitoring, 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 food safety has attracted more and more social attention. Food safety monitoring has become a major scientific, social and economic problem. The current food monitoring instruments are generally expensive, bulky, time-consuming to monitor, and cannot grade and sort food on site, which has become a major bottleneck restricting the popularization of monitoring technology to food sources. For this reason, research on cheap, small, convenient, and fast food safety monitoring methods and equipment that can ...

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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 instruments are expensive, and the technology is monopolized by patents, which is not conducive to popularization and application

[0015](3) Near-infrared line array detectors are expensive, and it is difficult to reduce the cost of the entire monitoring system

[0016](4) As the key device in the spectrum analysis instrument——diffraction grating / modulator, such devices used in the above spectrum analysis instrument are manufactured by MEMS technology. Complicated, difficult to guarantee quality

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