Recent advances in chemical composition imaging operation based on laser-induced breakdown spectroscopy

With the rapid development of laser-induced breakdown spectroscopy (LIBS) imaging technology, it has attracted widespread attention. A LIBS imaging system based on laser ablation generates two- and three-dimensional (2D/3D) images through the point scanning method. This paper reviews the recent developments based on LIBS chemical composition imaging technology, including its background, fundamental principles, operation types, applications, and technical upgrade schemes. Here, the types of LIBS imaging operations and proposals for technological upgrades are the focus of this review. More importantly, we point out the existing problems in LIBS imaging and provide our own insights into its future development directions, including LIBS signal optimization, LIBS imaging resolution improvement and multiple technology integration. As a newly recent development direction, the technology fusion method is also a very promising research field in chemical composition imaging based on LIBS. This review is of great significance for the research and application of LIBS chemical composition imaging operations, which will provide basic knowledge guidance for LIBS researchers.