Remote LIBS (Laser-induced Breakdown Spectroscopy) test system with multi-probe optical signal collection unit

Abstract

The invention belongs to the field related to atomic emission spectroscopy detection equipment, and discloses a remote LIBS (Laser-induced Breakdown Spectroscopy) test system with a multi-probe optical signal collection unit; the remote LIBS test system comprises a pulse laser, a beam expander, a focusing mirror group, two dichroscopes, the multi-path optical signal collection unit, a spectrograph and the like, wherein the multi-path optical signal collection unit comprises multiple sub collection probes, a multi-path optical fiber beam combiner channel and a transmission optical fiber, each sub collection probe is formed by a small-bore lens, and the sub collection probes are combined to achieve a function of collecting remote LIBS signal instead of a big-bore optical element. Compared with existing equipment, the remote LIBS test system can be used to effectively solve the problems that system cost is high, a collected signal is weak, detection accuracy is poor, and the like, and efficient detection on various to-be-detected objects with uncertain detection distances is convenient to perform.

Description

technical field [0001] The present invention belongs to the related field of atomic emission spectrometry detection equipment, more specifically, relates to a remote LIBS testing system equipped with a multi-probe optical signal collection unit, which can perform LIBS testing in a low-cost, easy-to-manipulate and high-precision manner, and especially It is suitable for remote detection occasions in environments such as radiation, high temperature, explosion and deep space. Background technique [0002] Laser-Induced Breakdown Spectroscopy (LIBS) technology, also known as laser probe technology, uses high-energy laser to ablate materials, forms high-temperature, high-electron-density plasma on the surface of materials, and By analyzing the characteristic spectral lines and their intensities of multiple elements in the plasma, the qualitative analysis of the composition and content of each element in the material can be realized. Compared with traditional detection technology...

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Problems solved by technology

[0004] Aiming at the above deficiencies or improvement needs of the prior art, the present invention provides a remote LIBS testing system equipped with a multi-probe optical signal collection unit, wherein by comprehensively considering the characteristics and various limitations of the remote LIBS testing process itself, the overall optical path The layout and structural arrangement have been redesigned, and at the same time, further optimization studies have been made on the specific composition, key performance parameters and mutual cooperation methods of important components such as multi-channel optical signal collection units and focusing lens groups. Actual tests show that it can not only realize long-distance LIBS signal acquisition by using only conventional small-aperture lenses, but also effectively solve the problems of high system cost, weak collection signal and poor detection accuracy compared with existing equipment, so it is especially Suitable for efficient detection of various objects with uncertain detection distances

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