Sample tester based on laser-induced breakdown spectroscopy

Abstract

The invention relates to the field of sample testing, and discloses a sample tester based on a laser-induced breakdown spectroscopy. The sample tester comprises an optical path chamber and a sample chamber, an incidence unit, a fluorescence collection unit and a spectroscopic analysis unit are arranged in the optical path chamber, and a sample operation platform for the placement of a sample is arranged in the sample chamber; both the optical path chamber and the sample chamber are sealed, the optical path is connected to the sample chamber through an optical window, a laser beam emitted by the incidence unit passes through the optical window to excite the sample to emit fluorescence, and the fluorescence collection unit collects and transmits the fluorescence to the spectroscopic analysisunit. By isolating and sealing the optical path chamber and the sample chamber, the optical system of the sample tester can be conveniently kept clean, and thereby the adverse influence of dust produced by the surface of a to-be-tested sample burned by laser in the process of analytical testing on the tester and a test result is greatly reduced.

Description

technical field [0001] The invention relates to the field of sample detection, in particular to a sample detection device based on laser-induced breakdown spectroscopy technology. Background technique [0002] Laser Induced Breakdown Spectroscopy (LIBS) is a brand-new material element analysis technology developed in the late 20th century. Its working principle is: under the action of high-power pulsed laser, the material on the surface of the sample is excited to become The plasma decays rapidly, radiates photons of specific frequency during the decay process, and generates characteristic spectral lines, whose frequency and intensity information includes the element type and concentration information of the analysis object. The fluorescence light information generated by the sample to be tested is analyzed by a spectrometer to obtain the spectral signals of different elements in the sample. Through the comparison and modeling analysis of samples with known components, the ...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a sample detection device based on laser-induced breakdown spectroscopy technology to solve the problem that the dust generated by laser ablation on the surface of the sample to be tested during the analysis and detection process has an adverse effect on the detection device itself and the detection results. question

Images