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Laser-induced breakdown spectroscopy enhanced measurement system with multi-point bifocal simultaneous excitation

A laser-induced breakdown and spectral enhancement technology, which is applied in the field of spectral measurement systems, can solve the problems of insufficient utilization of high-energy laser pulses, poor representation, and size damage of analyzed samples, and achieve the reduction of single-point single-point effect of single high-energy laser pulses. The effect of reducing measurement error and enhancing emission intensity

Active Publication Date: 2019-06-18
HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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Problems solved by technology

[0010] The purpose of the present invention is to provide a laser-induced breakdown spectrum enhanced measurement system with simultaneous multi-point double-focus excitation to solve the problem of poor representativeness of single-point excitation data of laser-induced breakdown spectrum in the prior art, inability to fully utilize high-energy laser pulses, and the analysis The problem of large-scale damage to the sample

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  • Laser-induced breakdown spectroscopy enhanced measurement system with multi-point bifocal simultaneous excitation
  • Laser-induced breakdown spectroscopy enhanced measurement system with multi-point bifocal simultaneous excitation
  • Laser-induced breakdown spectroscopy enhanced measurement system with multi-point bifocal simultaneous excitation

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Embodiment Construction

[0039] Such as figure 1 As shown, the system of the present invention includes a laser light source system 1; beam shaping, beam splitting and focusing system 2, which is composed of a beam shaping unit 2-1, a beam splitting unit 2-2, and a beam focusing unit 2-3; laser plasma Collection and optical fiber transmission system 4; Spectral splitting and detection system 5; Circuit control, data acquisition and processing system 6.

[0040] Measurement process: The measurement process of the whole device is the same as conventional laser-induced breakdown spectroscopy measurement. That is: the start and end control commands are issued by the circuit control, data acquisition and processing system 6. First, the laser light source system 1 emits laser pulses according to the received control trigger signal. After beam shaping, beam splitting and focusing system 2, the split beams are focused. The laser pulse acts on the measured sample 3 to form a laser plasma similar to a surface ...

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Abstract

The invention discloses a laser-induced breakdown spectroscopy enhanced measurement system for multipoint bifocal simultaneous excitation; a single beam of high-energy laser pulse is divided into multiple beams, multiple focusing points are generated on a bifocal plane to simultaneously excite a sample under analysis and ambient gas, laser plasma spectrum emission approximate to an area source is formed, efficient utilization of the single-beam high-energy laser pulse and laser plasma spectrum enhanced excitation are achieved, and laser plasma spectral measurement is effectively achieved for water / soil / solid waste / alloy samples and other samples. The system of the invention has the advantages that laser plasma emission area is enlarged, single-point acting wound by the single-beam high-energy laser pulse is narrowed, laser plasma emission intensity is enhanced, sample data representativeness and spectral stability are improved, the influence of sample non-uniformity and single-point action of the single-beam high-energy laser pulse upon spectral repeatability and structural characteristics of material is reduced, and the system is suitable for the application of laser-induced breakdown spectroscopy in different measurement fields.

Description

technical field [0001] The invention relates to the field of spectrum measurement systems, in particular to a laser-induced breakdown spectrum enhancement measurement system for multi-point bifocal simultaneous excitation. Background technique [0002] Laser-induced breakdown spectroscopy is a rapid analysis method for elements, mainly based on the interaction between laser and matter to generate laser plasma spectrum, through the analysis of characteristic spectral line intensity, position and shape, the qualitative and quantitative analysis of elements is realized, which has the advantages of simple analysis , No need for sample pretreatment, multi-element simultaneous measurement and other advantages, a lot of research work has been carried out in the fields of environmental monitoring, industrial process control, biomedicine and material analysis. [0003] Analysis of existing technical characteristics: [0004] 1. Application problems: At present, there are application...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/71G01N21/01
CPCG01N21/01G01N21/718G01N2201/0668G01N2201/068
Inventor 赵南京马明俊方丽孟德硕殷高方甘婷婷杨瑞芳肖雪刘建国刘文清
Owner HEFEI INSTITUTES OF PHYSICAL SCIENCE - CHINESE ACAD OF SCI
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