Portable Raman spectrometer specially for detecting foods and drugs

Abstract

The invention discloses a portable Raman spectrometer specially for detecting foods and drugs. The portable Raman spectrometer comprises a laser, a collimating lens I, a bidirectional dichronic mirror, a microscope lens, a focusing lens, a slit, a collimating lens II, reflection and diffraction gratings, an imaging focusing lens, a DMD chip, an acquisition focusing lens assembly, a detector, an analog-to-digital converter, a microprocessor and a liquid crystal screen. The portable Raman spectrometer utilizes the DMD chip and the unit InGaAs detector to replace an array CCD detector of the traditional Raman spectrometer, reduces an analysis cost, reduces an apparatus volume and is portable. The portable Raman spectrometer is specially used for detecting foods and drugs, has a fast and accurate detection process, prevents sample damage, is portable, is free of a special-purpose optical platform and has low use environment requirements.

Description

technical field [0001] The invention relates to the technical field of spectral analysis and food and drug detection, in particular to a portable Raman spectrometer for detecting food and drugs. Background technique [0002] Food and drug safety is directly related to our health and life safety. In recent years, my country's food and drug safety problems have occurred frequently. Although the supervision of relevant state departments has been continuously strengthened, problematic food and counterfeit drugs are still appearing on the market, so it is urgent to promote It is a convenient, effective and fast testing method that allows the public to see the test results and buy food and medicines with confidence. [0003] Raman spectroscopy is an effective detection and analysis method based on the Raman effect. The Raman effect means that when a laser of a certain frequency is irradiated on the surface of the sample, the molecules in the substance absorb part of the energy, vi...

AI Technical Summary

Problems solved by technology

The traditional Raman spectrometer has a large volume, precise internal structure, and high cost. It needs to be placed on an optical platform and has high requirements for the use environment. Not only is the analysis cost relatively high, but it is also inconvenient to carry, so it is not suitable for popularization and application.

[0004] To sum up, how to solve the problems that the Raman spectrometer is inconvenient to carry, has high requirements for the use environment and high cost has become an urgent problem to be solved by those skilled in the art.

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