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LIBS (Laser-induced Breakdown Spectroscopy) active and passive dual-mode spectrum detection method

A spectral detection, active and passive technology, applied in the field of photoelectric detection, can solve the problems of inability to achieve full multiplexing of optical channels and high system complexity, improve LIBS active spectral resolution and infrared passive spectral signal-to-noise ratio, and improve detection efficiency. , the effect of internal structure optimization

Active Publication Date: 2020-03-10
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

[0004] Since the LIBS spectrum is mainly located in the visible light band, and the passive spectral detection is mainly located in the infrared band, the conventional combined active and passive spectral detection often cannot realize the full multiplexing of optical channels, resulting in high complexity of the system. The conventional combined system needs to prepare Two sets of spectrometers, because conventional spectrometers cannot complete the simultaneous detection of active and passive spectra

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  • LIBS (Laser-induced Breakdown Spectroscopy) active and passive dual-mode spectrum detection method
  • LIBS (Laser-induced Breakdown Spectroscopy) active and passive dual-mode spectrum detection method

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Embodiment Construction

[0029] The specific embodiment of the present invention is as figure 1 and figure 2 shown.

[0030] The planetary LIBS active-passive dual-mode material detection method proposed by the present invention is realized on the LIBS active-passive dual-mode material detection system. Slot 5, LIBS pulse laser 35, total reflection mirror 36, ultraviolet detector 37, Schmidt mirror 41, ranging laser 42, one-dimensional electric stage 43, secondary mirror 44, electric controller 45, main dichroic mirror 46, main Mirror 47, central lens 49, rear dichroic mirror 50 are formed;

[0031] Wherein the detection optical path is a cassette type telescope structure, which is mainly composed of a primary mirror 47, a secondary mirror 44, and a Schmidt mirror 41, and the Schmidt mirror 41 is used to eliminate aberrations; Driven by the electric controller 45, translational movement is made along the direction of the main optical axis 40 to realize focusing; the self-focusing function is reali...

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Abstract

The invention discloses an LIBS (Laser-induced Breakdown Spectroscopy) active and passive dual-mode spectrum detection method. The method comprises four steps such as self-focusing implementation, LIBS active spectrum detection, infrared passive spectrum detection and active and passive spectrum analysis. The method has the beneficial effects that the optimization of the internal structure of a spectrometer is realized by adopting ingenious electromechanical switching and grating area light splitting, and the compactness and convenience of the system are improved; the composite detection of the LIBS active spectrum and the infrared passive spectrum is realized by the same spectrometer and the same optical fiber inlet, and the detection efficiency is improved; and different designs are adopted at a sensor end for different active and passive spectrum characteristics, so that targeted spectrum detection is realized, and the LIBS active spectrum resolution and the infrared passive spectrum signal-to-noise ratio are improved.

Description

technical field [0001] The invention relates to a dual-mode material detection method, in particular to a LIBS active and passive dual-mode spectrum detection method, which is suitable for the analysis of planetary material components and belongs to the field of photoelectric detection. Background technique [0002] In the field of deep space exploration, the analysis of planetary surface matter requires unmanned automatic photoelectric detection methods. Compared with other complex material composition detection methods, the photoelectric material composition analysis method based on laser spectroscopy does not require time-consuming reagent addition and pretreatment preparation, can improve the analysis speed, is suitable for real-time analysis, and can multi-element and multi-element Simultaneous analysis of molecules shows great advantages. [0003] In the detection technology of planetary material spectrum, one type belongs to the active spectrum detection technology, ...

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Application Information

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IPC IPC(8): G01N21/71G01N21/35
CPCG01N21/718G01N21/35
Inventor 万雄王泓鹏袁汝俊李晨红
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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