Automatic collection system of laser-induced breakdown spectroscopy

Abstract

The invention relates to a novel analysis way in the spectrum analysis field, in particular to an automatic collection system of a laser-induced breakdown spectroscopy, which is characterized in that: a sample is moved through a movable platform, the height of the sample is estimated through the precise positioning of the laser, and the data are automatically collected. The automatic collection system has the advantages that: the automation of control and data collection of an experimental device is realized, so the labor investment can be greatly reduced, and the experiment is more convenient to carry out; an automatic aligning function of a laser ablation position can be realized, so a specific position to be ablated by the laser is conveniently known in advance, and the positioning function contributes to measuring a small-size sample; a distance of a focusing lens in the sample is locked, so the focusing degree of the laser can be maintained constant during the experimental process, and further the constant power density of the laser reaching the surface of the sample can be guaranteed; and the real-time monitoring of an optical detection device can substitute the situation that the sample is directly observed by the eyes during the experimental process, so the danger that the laser shoots the eyes can be avoided.

Description

[0001] technical field [0002] The invention relates to a novel analysis system in the field of spectrum analysis, in particular to a laser-induced breakdown automatic collection system. Background technique [0003] As early as the 1960s, with the generation of lasers, the application of laser ablation on the surface of samples has attracted people's attention. However, due to the lag in the development of laser and spectral detection equipment at that time, this technology has not been greatly developed. Until the 1980s, with the rapid development of lasers, and more importantly, the emergence of highly sensitive optical detection equipment (enhanced optical detection equipment), LIBS technology has achieved unprecedented development. In 1981, L.J. Radziemski, D.A. Cremers and others of Los Alamos National Laboratory in the United States quoted LIBS to measure harmful metals in the air. In 1983, they also detected traces of beryllium in the air with LIBS technology. In...

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Problems solved by technology

[0008] At present, the optical path of LIBS experiments in the laboratory is basically built by the experimenters themselves, and there is no complete system, so it is cumbersome to set the parameters of the experiment and synchronize the sample movement and data acquisition.

Before each signal measurement, the sample movement and sample height are estimated by manual operation. Once the sample is not flat during the experiment, the focus cannot be guaranteed to be consistent every time.

It will not only waste a lot of time but also cause many experimental errors due to human factors

In addition, when the sample is relatively small, it is difficult to achieve precise positioning of the laser by simply placing the sample manually

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