Classification of uneven steel samples by laser induced breakdown spectroscopy based on a Bessel beam

Abstract

The combination of a Bessel beam and LIBS is an effective method for rapidly detecting uneven samples in industry, which has higher accuracy and stability under fewer spectra.

Spectral correction study to reduce the influence of sample surface morphology on laser-induced breakdown spectroscopy

“…The RSD and variation amplitude (VA) of spectral intensity were used to evaluate the spectral uctuation, where the smaller the value, the smaller the spectral uctuation. VA was calculated using eqn (16).…”

“…Yan et al combined the LIBS technique with a Bessel beam to classify steel samples with non-flat surfaces, the average accuracy was more than 93.17%. 16 Some studies added auxiliary optical structures in LIBS systems to obtain the optimal focusing position, such as laser pointers, 17 and multi-elemental mapping method. 18 For acquiring stable and high-intensity spectra of non-flat samples, Lei et al proposed a single-beam-splitting method.…”