Journal
APPLIED OPTICS
Volume 54, Issue 9, Pages 2477-2482Publisher
OPTICAL SOC AMER
DOI: 10.1364/AO.54.002477
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Funding
- U.S. Department of Energy by Lawrence Livermore National Laboratory [DE-AC52-07NA27344]
- Laboratory Directed Research and Development Program at Lawrence Livermore National Laboratory [13-SI-002]
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We have calculated the absorption of laser light by a powder of metal spheres, typical of the powder employed in laser powder-bed fusion additive manufacturing. Using ray-trace simulations, we show that the absorption is significantly larger than its value for normal incidence on a flat surface, due to multiple scattering. We investigate the dependence of absorption on powder content (material, size distribution, and geometry) and on beam size. (c) 2015 Optical Society of America
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