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Portable laser induced spectrum detection system

A spectroscopic detection and laser-induced technology, applied in the field of laser detection, can solve the problems of difficult to achieve trace and accurate quantitative analysis

Inactive Publication Date: 2015-06-24
王宏
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Problems solved by technology

In this way, the traditional LIBS needs to use the integration delay in the detection system to avoid the influence of the continuous spectrum, but due to the different types and shapes of the measured samples, the duration of the continuous spectrum is also different, so the traditional LIBS technology is often affected by laser scattering and It is difficult to achieve trace and precise quantitative analysis due to the influence of continuum

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  • Portable laser induced spectrum detection system

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Embodiment Construction

[0012] Through the miniaturized ultra-short pulse sub-nanosecond laser 1, the repetition frequency is 5KHz, the pulse width is 1.5 nanoseconds, and the pulse energy is 40uJ, a certain intensity of plasma is generated on the surface of the material, thereby obtaining a spectral signal with a high signal-to-noise ratio. The micro-spectrometer 2 with C-T structure realizes the analysis and processing of spectral signals with high signal-to-noise ratio in specific bands. The optical fiber guidance system 3, by coupling the laser and the spectrometer, measures the surface of the sample in a contact manner at the same time, thus ensuring the relative consistency of the entire optical path, the obtained plasma intensity is stable, and is less affected by the external atmosphere. The control and data processing and display module 4 processes the results of the spectral analysis and visually displays the element content of the sample through the display screen. The battery module 5 use...

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Abstract

The invention relates to a novel portable laser induced spectrum detection system, and belongs to the technical field of laser detection. The ultrashort pulse laser of subnanosecond laser makes the material surface produce a plasma spectrum with certain intensity, and then spectrum analysis is employed to obtain the material composition. The system is characterized by comprising an optical fiber coupling of subnanosecond pulse laser, a signal acquisition fiber, a C-T structure grating spectrometer, a data processing and display system and a battery module. The system can realize contact type measurement of solids and powder materials, such as metals, minerals and soils, and accurate detection of the content of more than 20 elements including iron, nickel, copper, magnesium, phosphorus, sulfur and carbon. The invention does not need any laser pulse trigger delay design, realizes real-time composition detection of all kinds of solid and powder through simple optical path and structure, and has the advantages of simple operation and fast measurement.

Description

technical field [0001] The invention relates to a novel portable laser-induced spectrum detection system, which is suitable for contact measurement and analysis of the element content of various solids and powders such as metals, minerals, soils, etc., and belongs to the technical field of laser detection. Background technique [0002] Laser Induced Spectroscopy (LIBS) is a method of testing the composition of a sample. A laser pulse is used to generate a plasma on the surface of the sample, which contains a plasma mixture representing the elemental composition of the sample. The elements of the sample are obtained by analyzing the spectrum of the plasma. composition. Traditional LIBS technology uses high-energy pulsed or continuous lasers to irradiate the surface of the sample to generate high-temperature plasma. In addition to the characteristic spectral lines of the sample elements, the plasma spectrum also contains a strong continuous spectrum (about tens of nanoseconds)...

Claims

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Application Information

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IPC IPC(8): G01N21/63
Inventor 王宏
Owner 王宏
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