Investigation of laser percussion hole drilling by use of speckle correlation
Applied Optics, Vol. 44, Issue 30, pp. 6338-6344 (2005)
http://dx.doi.org/10.1364/AO.44.006338
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Abstract
In this paper speckle correlation is introduced as a tool to investigate the heat-influenced area during material processing with laser light. Two materials were investigated, a pure silver sheet and a sheet of SiC–diamond composite. The processing laser used in the experiments was a diode-pumped acousto-optical Q-switched Nd:YAG laser that allowed percussion hole drilling to be performed using green light through a second-harmonic crystal. The measurements were performed using a continuous-wave He–Ne laser and a digital camera. The experimental results show that the heat-influenced area is ∼5000 times larger than the actual hole being drilled and that it reaches a steady-state condition toward the end of the processing cycle.
© 2005 Optical Society of America
OCIS Codes
(120.0120) Instrumentation, measurement, and metrology : Instrumentation, measurement, and metrology
(120.6160) Instrumentation, measurement, and metrology : Speckle interferometry
(350.3390) Other areas of optics : Laser materials processing
ToC Category:
Instrumentation, Measurement, and Metrology
Citation
O. Yalukova, N. Miroshnikova, P. Gren, I. Sárady, and M. Sjödahl, "Investigation of laser percussion hole drilling by use of speckle correlation," Appl. Opt. 44, 6338-6344 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-30-6338
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