Laser-induced breakdown-pulsed Raman spectroscopy combined system and using method

Abstract

The invention discloses a laser-induced breakdown-pulsed Raman spectroscopy combined system which comprises a pulsed laser, a micro-imaging light path, a micro-imaging device, a Raman signal receiving system, a whole-spectrum LIBS signal receiving system, a spectrograph and a sample platform. The wavelength of laser is changed by adopting a half transparent and half reflecting mirror beam-splitting and frequency-doubling module, and the laser-induced breakdown-pulsed Raman spectrum is switched by using a mechanical photochopper. The invention also discloses a using method of the combined system. With the adoption of a pulsed laser, a set of optical system and a set of spectrograph system, two different types of signals excited by two different wavelengths are acquired, no movable lens assembly is arranged in the optical system, the structure is stable, and the performance is high.

Description

technical field [0001] The invention relates to the technical field of spectral analysis, and relates to a laser-induced breakdown-pulse Raman spectroscopy combined system and a use method. Background technique [0002] Laser-induced breakdown spectroscopy (LIBS) technology forms laser-induced plasma on the surface of the sample by effectively focusing high-energy laser pulses. Due to the high local energy density and high temperature of the plasma, sampling, atomization, excitation and even In the whole process of ionization, the emission spectrum of the plasma is collected by a spectrometer, which can realize the qualitative and quantitative analysis of the elements of the sample to be measured. This method has the characteristics of fast analysis speed, simple operation, no need for sample pretreatment, simultaneous determination of multiple components, and long-distance detection capabilities. use. Raman scattering spectroscopy (Raman) is a non-destructive molecular sp...

AI Technical Summary

Problems solved by technology

[0004] Most of the existing combined methods use two different lasers or use the same wavelength of the same laser to excite the atomic spectrum and the molecular spectrum respectively. Although new technological innovations have been achieved, the simultaneous analysis of material elements and structures can be achieved, but , two sets of different optical path bodies are still used. Since the optical path design is relatively independent, the fusion of the two technologies has not really been realized, but the two technologies are simply used together.

However, in the implementation of using the same wavelength for excitation, due to the different excitation conditions of LIBS and Raman signals, this technology cannot obtain the best signal effect.

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