Scratch healing with CO2 Laser on fused silica for surface repair
At a Glance
Section titled âAt a Glanceâ| Metadata | Details |
|---|---|
| Publication Date | 2024-01-01 |
| Journal | EPJ Web of Conferences |
| Authors | Simon Walder, Sven Lämmler, Dominique Filipec, Heidi Cattaneo, Sebastian Henkel |
Abstract
Section titled âAbstractâTo 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 CO 2 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.