Microcell LIBS plasma spectral collection system

Abstract

The invention belongs to the technical field of optics, and particularly relates to a microcell LIBS plasma spectral collection system. The system comprises a focusing actuator, a collection bracket,a focusing microobjective, lens cone adjusting frames, collection lens cones, a collection optical fiber and a protection atmosphere cover, wherein the fixed end of the focusing actuator is connectedwith a laser light path and the driving end of the focusing actuator is connected with the collection bracket; the lower center of the collection bracket is connected with the focusing microobjectiveand the two lower sides of the collection bracket are respectively connected with the two lens cone adjusting frames; the lens cone adjusting frames are internally provided with the collection lens cones; the collection lens cones are obliquely laid relative to the laser light path; the collection optical fiber is connected with the collection lens cones; and the protection atmosphere cover is connected with the downward side of the collection bracket and contains the focusing microobjective and the collection lens cones in the internal space of the protection atmosphere cover. The system is capable of realizing the aims of close-range high-efficiency spectral collection, local area argon shield enhancement, automatic focusing and follow-up collection.

Description

technical field [0001] The invention belongs to the field of optical technology, in particular to a micro-area LIBS plasma spectrum collection system. Background technique [0002] Laser-induced breakdown spectroscopy (LIBS) detection technology is an efficient and fast spectral analysis technology, which can give the composition information of the detected sample in a few seconds or less. At present, most LIBS detection spot sizes are concentrated in the range of hundreds of microns to millimeters, while micro-area LIBS (detection spot size reaches the micron level) is rarely studied and applied. In the detection of micro-area LIBS, due to the small size of the plasma, there are few materials that are induced to break down, resulting in a weak plasma emission spectrum. How to improve the spectral intensity and complete spectral collection efficiently and stably is a key technical problem that must be solved. There are two ways to solve the above key problems, one is to inc...

AI Technical Summary

Problems solved by technology

The increase of laser energy will indirectly lead to the increase of ablation spot, which will reduce the detection resolution of micro-area LIBS, so it is not applicable

The hardware cost and technical difficulty involved in double pulse are high, and it is not an optimal solution

Images