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Multipulse laser-induced breakdown spectrum on-line detection system

A technology of laser-induced breakdown and pulsed laser, which is applied in thermal excitation analysis, material excitation analysis, etc., can solve the problems of increasing system cost, difficulty in ensuring focus, and inability to achieve double-pulse plasma excitation, so as to save costs and reduce Quantity effect

Inactive Publication Date: 2014-12-03
ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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Problems solved by technology

However, the current double-pulse LIBS technology uses two lasers to achieve double-pulse excitation through the method of power control delay, which increases the cost of the system, and focuses the two lasers separately, making it difficult to ensure the focus on the sample to be tested. At the same point, double-pulse plasma excitation with maximum efficiency cannot be achieved

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  • Multipulse laser-induced breakdown spectrum on-line detection system
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Embodiment Construction

[0031] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below through specific embodiments in conjunction with the accompanying drawings.

[0032] figure 1 It is a structural schematic diagram of the first embodiment of the multi-pulse laser-induced breakdown spectrum online detection system of the present invention. Such as figure 1 Shown is a double-pulse laser-induced breakdown spectroscopy online detection system, including a pulse laser 1, an optical path extension circuit device 2 ( figure 1 dotted line box), the optical path converging device 11, the second optical path guiding device 3 and the data detection system 4 ( figure 1shown in dashed box). The optical path extension circuit device 2 includes a transmission mirror 5, a first polarizer 6, two optical path adjustment mirrors 7, a pulse delay device 8, a 1 / 4 wave plate 9, and a mirror 10. The optical path c...

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Abstract

The invention provides a multipulse laser-induced breakdown spectrum on-line detection system which comprises a pulse laser, an optical-path extending loop device, a second light-path guiding device, a light-path convergence device and a data detection system. The optical-path extending loop device comprises a light-path splitting device, a pulse delay device and a first light-path guiding device. The light-path splitting device is used for dividing pulse laser into first pulse laser and second pulse laser. The pulse delay device is used for increasing optical path of the second pulse laser. The first light-path guiding device is used for changing the light path of the second pulse laser with the increased optical path. The second light-path guiding device is used for changing the light path of the first pulse laser. The light-path convergence device is used for converging the first pulse laser and the second pulse laser with the increased optical path to a same specific light path. A pulse laser is adopted to generate multiple pulse lasers with different optical paths, and the multiple pulse lasers are focused on a same position on a sample to be detected.

Description

technical field [0001] The invention relates to the technical field of laser spectrum detection, in particular to an on-line detection system of multi-pulse laser induced breakdown spectrum. Background technique [0002] Laser Induced Breakdown Spectroscopy (LIBS) is a quantitative analysis technique based on the emission spectrum generated by the interaction between laser and material. This method only needs a few micrograms in the measurement process, so it can achieve non-destructive Measurement; elemental analysis of substances in any physical state can be realized without sample pretreatment, which makes LIBS technology widely used; LIBS technology is an application of optical technology, which can measure and analyze samples as far as tens of meters away. It is very attractive in dangerous, high-temperature environments or hostile environments; using LIBS technology for component analysis, the whole process only takes about ten seconds, and the real-time and rapidity a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/71
Inventor 刘洋余锦樊仲维貊泽强聂树真
Owner ACAD OF OPTO ELECTRONICS CHINESE ACAD OF SCI
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