Vortex light laser-induced breakdown spectrum enhancement method

Abstract

The invention relates to a laser-induced breakdown spectrum enhancement method by using vortex light. Hardware used herein comprises a light source, a deformable mirror, a computer, a high-value aperture lens, a spectrum detector and a spectrograph; the deformable mirror is arranged on a light path of vortex laser emitted by a vortex laser generation device, the signal output and input ends of thedeformable mirror are separately connected with corresponding interfaces of the computer; the high-value aperture lens is arranged on the light path of reflective light of the deformable mirror; a sample to be tested is arranged on a light focusing point of the high-value aperture lens; and the spectrum detector is connected with the spectrograph. The vortex light laser-induced breakdown spectrumenhancement method provided by the invention has the advantages that laser-induced breakdown spectrum enhancement is achieved by using the controllable vortex light, the constraint effect on the plasma is achieved by using the light field gradient generated by the controllable vortex light, by using the change of the vortex light, the directed guiding effect is achieved on particles generating adiscrete spectrum line, and thus the purpose of enhancing the LIBS spectrum is achieved. The method provided by the invention is good in spectrum enhancement effect and high in measurement accuracy.

Description

technical field [0001] The invention relates to an emission spectrum analysis method based on atoms or ions, and in particular provides a method for realizing laser-induced breakdown spectrum enhancement by using controllable vortex light. Background technique [0002] With the development of society and production needs, the traditional LIBS technology is increasingly unable to meet the application in production, and more and more exposes its own limitations, mainly as follows: (1) The detection limit of each element of LIBS is quite different; (2) ) Affected by the nature of the sample, the surface condition and the effect of the body, the detection limit of the element is high, resulting in poor detector sensitivity; (3) The intensity of the LIBS spectral line is related to the content of the element. For elements with a low content, the spectral spectrum Lines are often relatively weak, which makes it difficult to distinguish spectral lines and is prone to misjudgment. ...

AI Technical Summary

Problems solved by technology

[0003] The traditional LIBS is enhanced by using space constraints. The traditional space constraints use parallel panel space constraints. Two panels with the same size and flat inner walls are placed on the sample, and the incident laser beam ablates the sample at the center of the two panels to excite plasma. body, and the parallel plates placed on both sides will constrain the excited plasma, but the parallel plates can only compress the plasma from both sides, the compression efficiency is low, and the enhancement effect is poor

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