Correlation between keyhole geometry and reflected laser light distribution in laser-based manufacturing

Published

October 2, 2023

Author(s)

David Deisenroth, Sergey Mekhontsev, Wenda Tan, Wenkang Huang

Abstract

This study investigated the correlation between the keyhole geometry and reflected laser light distribution during laser-based manufacturing processes. An "imaging dome" system was developed to capture the distribution of the reflected laser light on a registration dome during the process, and found that the reflected laser distribution varied significantly as the keyhole shape was changed by reducing the laser scanning speed. A numerical model was leveraged to understand the multiple reflections of laser rays within the keyholes of different geometries. The results demonstrated the potential of a novel approach for in-situ detection of keyhole shapes during laser-based manufacturing.

Citation

Manufacturing Letters

Volume

38

Pub Type

Journals

Download Paper

https://doi.org/10.1016/j.mfglet.2023.09.002

Local Download

Keywords

Laser-based manufacturing, reflected laser light distribution, keyhole geometry, imaging dome, computational physics modeling.

Citation

Deisenroth, D. , Mekhontsev, S. , Tan, W. and Huang, W. (2023), Correlation between keyhole geometry and reflected laser light distribution in laser-based manufacturing, Manufacturing Letters, [online], https://doi.org/10.1016/j.mfglet.2023.09.002, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=936952 (Accessed October 17, 2025)