Non-contact rapid detection system and method for fine Raman spectrums of substances

Abstract

The invention discloses a non-contact rapid detection system and method for fine Raman spectrums of substances. The system comprises a high-spectral resolution spatial heterodyne spectrometer for measurement and a laser; a tested object is arranged between the spaced high-spectral resolution spatial heterodyne spectrometer and laser; and the high-spectral resolution spatial heterodyne spectrometeris externally connected with a computer terminal. The method comprises the following steps of 1) simulating a spectrum; 2) determining the spatial heterodyne spectrometer; 3) determining parameters of the laser; and 4) carrying out detection. The system is low in cost and easy to realize. The method does not need to treat samples and is suitable for detecting substances which are not easy to contact and analyzing and detecting chemical drugs.

Description

technical field [0001] The invention relates to the analysis and detection technology of chemicals and substances that are not easily accessible, in particular to a non-contact and rapid detection system and detection method for fine Raman spectrum of substances. Background technique [0002] Raman spectroscopy analysis technology is an accurate, non-destructive and efficient spectral detection technology based on Raman effect. The Raman effect means that when a substance is irradiated with a laser, a series of Raman scattered light with a wavelength larger or smaller than the wavelength of the irradiated light will be produced. The displacement of these Raman scattered light relative to the irradiated laser corresponds to the type of molecular groups of the substance, and the intensity depends on the number of molecular groups of the substance. Therefore, Raman spectroscopy can be used for qualitative and quantitative measurement of substance molecules. For the detection o...

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Problems solved by technology

[0003] Ordinary Raman spectroscopy measurement systems mainly include: lasers, optical filters, and spectrometers. There are two defects. One is that the filtering effect of optical filters is limited, and it can only filter out Rayleigh scattered light. The impact is very small; the second is that the optical signal utilization rate of ordinary spectrometers is low and the spectral resolution is limited, and more accurate subdivision and identification of weak spectra cannot be achieved

Therefore, the current detection of Raman spectroscopy requires surface enhancement of the sample, which is cumbersome.

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