A Vortex Laser-Induced Breakdown Spectrum Enhancement Method

Abstract

The invention relates to a method for laser-induced breakdown spectrum enhancement using controllable vortex light, wherein the hardware used includes a light source, a deformable mirror, a computer, a high numerical aperture lens, a spectral detector and a spectrometer, and the deformable mirror is arranged on a vortex On the optical path of the vortex laser emitted by the vortex laser generating device, the signal output and input terminals of the deformable mirror are respectively connected to the corresponding interfaces of the computer; the high numerical aperture lens is arranged on the optical path of the reflected light of the deformable mirror, and the sample to be tested is set At the light focusing point of the high numerical aperture lens, the spectral detector is connected with the spectrometer. The advantages of the present invention are that the controllable vortex light can be used to realize laser-induced breakdown spectrum enhancement, the optical field gradient force generated by the controllable vortex light can be used to confine the ion body, and the change of the vortex light can be used to orient the particles that generate discrete spectral lines The guiding role, so as to achieve the purpose of LIBS spectral enhancement. The invention has good spectral enhancement effect and high measurement precision.

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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