%0 Conference Paper %1 holder2019octcontrolled %A Holder, Daniel %A Boley, Steffen %A Buser, Matthias %A Irion, Christoph %A Weber, Rudolf %A Graf, Thomas %D 2019 %K %T OCT-controlled generation of complex geometries on stainless steel using ultra-short laser pulses %X The generation of complex surface geometries with a defined depth, high contour accuracy, and low roughness in steel with ultra-short pulse laser ablation is still a challenge. In the present work, optical coherence tomography (OCT) providing high-resolution optical distance measurement of the ablation depth was combined with a Galvanometer-Scanner for fast beam deflection. The actual ablation depth was measured during processing. The online comparison with the target ablation depth was used to select areas that have to be processed in the subsequent pass. This selective material ablation allowed to smooth surface defects caused by inhomogeneous material removal. Furthermore, the selective material ablation was used to generate locally different ablation depths in order to create complex geometries. As a result, the surface roughness could be significantly reduced compared to the uncontrolled process, and precise ablation of complex geometries on steel was demonstrated.

@inproceedings{holder2019octcontrolled, abstract = {The generation of complex surface geometries with a defined depth, high contour accuracy, and low roughness in steel with ultra-short pulse laser ablation is still a challenge. In the present work, optical coherence tomography (OCT) providing high-resolution optical distance measurement of the ablation depth was combined with a Galvanometer-Scanner for fast beam deflection. The actual ablation depth was measured during processing. The online comparison with the target ablation depth was used to select areas that have to be processed in the subsequent pass. This selective material ablation allowed to smooth surface defects caused by inhomogeneous material removal. Furthermore, the selective material ablation was used to generate locally different ablation depths in order to create complex geometries. As a result, the surface roughness could be significantly reduced compared to the uncontrolled process, and precise ablation of complex geometries on steel was demonstrated.}, added-at = {2023-08-31T14:12:03.000+0200}, author = {Holder, Daniel and Boley, Steffen and Buser, Matthias and Irion, Christoph and Weber, Rudolf and Graf, Thomas}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/2bac5e54ffb8296dbe63bcc305efa8125/puma-wartung}, eventdate = {2019}, eventtitle = {Lasers in Manufacturing Conference}, interhash = {2ad5a05d6064736de8decf371c568149}, intrahash = {bac5e54ffb8296dbe63bcc305efa8125}, keywords = {}, timestamp = {2023-08-31T12:12:03.000+0200}, title = {OCT-controlled generation of complex geometries on stainless steel using ultra-short laser pulses}, venue = {Munich}, year = 2019 }