20.500.12556/RUL-105541 Evaluation of laser-induced thin-layer removal by using shadowgraphy and laser-induced breakdown spectroscopy Shadow photography and laser-induced breakdown spectroscopy (LIBS) are studied as methods for monitoring the selective removal of thin (i.e., under 100 [micro]m) layers by laser ablation. We used a laser pulse of 5 ns and 16 mJ at 1064 nm to ablate an 18-[micro]m-thin copper layer from the fiberglass substrate. On the basis of shadowgraphs of the laser-induced shock waves, we measured the optodynamic energy-conversion efficiency, defined as the ratio between the mechanical energy of the shock wave and the excitation-pulse energy. Our results show that this efficiency is significantly higher for the laser pulse-copper interaction than for the interaction between the excitation pulse and the substrate. LIBS was simultaneously employed in our experimental setup. The optical emission from the plasma plume was collected by using a spectrograph and recorded with a streak camera. We show that advancing of laser ablation through the copper layer and reaching of the substrate can be estimated by tracking the spectral region between 370 and 500 nm. Therefore, the presented results confirm that LIBS method enables an on-line monitoring needed for selective removal of thin layers by laser. shadow photography laser-induced breakdown spectroscopy laser material processing senčna fotografija spektroskopija lasersko povzročene plazme laserski obdelovalni procesi true false true Angleški jezik Slovenski jezik Članek v reviji 2018-12-05 08:39:29 2018-12-05 08:39:31 2025-03-06 10:45:25 0000-00-00 00:00:00 2016 0 0 Str. 1-7 iss. 3 Vol. 122 Mar. 2016 0000-00-00 PostprintKoncna Objavljeno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 535(045) 0947-8396 10.1007/s00339-016-9697-3 14519579 14196007 RAZ_Rabasovic_Maja_S._i2016.pdf RAZ_Rabasovic_Maja_S._i2016.pdf 1 418C80B1229BF8206AF8A56F927EC961 c9961c167e487eebf0bf3bf5406cf4b609c2ddaa8b2c6e3676590052eb4f7044 3228105e-a1b6-11eb-a523-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=116209 https://link.springer.com/article/10.1007/s00339-016-9697-3 0 cb340f59-fa6e-11ef-b232-0050569b8976 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=200391 Fakulteta za strojništvo 0 0 0