https://doi.org/10.1051/epjconf/202430903021
Scratch healing with CO2 Laser on fused silica for surface repair
1 OST — Eastern Switzerland University of Applied Sciences, Institute for Microtechnology and Photonics, Buchs, Switzerland
2 EAH - Emst-Abbc-Univcrsity of Applied Sciences, Department SciTcch, Jena, Germany
* Corresponding author: simon.walder@ost.ch
Published online: 31 October 2024
To prevent the disposal of minimally damaged lenses that fall outside the acceptable scratch and dig tolerance levels, an experimental study was conducted to repair mechanical scratches on a fused silica surface. The scratches were created using a diamond tip and then repaired using a CO2 laser. Various loads on the diamond lip and laser output power were tested. The transmission changes and subsurface damages were analysed. The surface quality analysis was performed using a white light interferometer, while the subsurface damage analysis was performed using optical coherence tomography. Local absorption differences can be quantified using photothermal deflection. To significantly enhance local transmittance, brittle and ductile scratches of various depths have been successfully healed.
© The Authors, published by EDP Sciences, 2024
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
