1 March 2018 In situ process monitoring in selective laser sintering using optical coherence tomography
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Abstract
Selective laser sintering (SLS) is an efficient process in additive manufacturing that enables rapid part production from computer-based designs. However, SLS is limited by its notable lack of in situ process monitoring when compared with other manufacturing processes. We report the incorporation of optical coherence tomography (OCT) into an SLS system in detail and demonstrate access to surface and subsurface features. Video frame rate cross-sectional imaging reveals areas of sintering uniformity and areas of excessive heat error with high temporal resolution. We propose a set of image processing techniques for SLS process monitoring with OCT and report the limitations and obstacles for further OCT integration with SLS systems.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Michael R. Gardner, Michael R. Gardner, Adam Lewis, Adam Lewis, Jongwan Park, Jongwan Park, Austin B. McElroy, Austin B. McElroy, Arnold D. Estrada, Arnold D. Estrada, Scott Fish, Scott Fish, Joseph J. Beaman, Joseph J. Beaman, Thomas E. Milner, Thomas E. Milner, } "In situ process monitoring in selective laser sintering using optical coherence tomography," Optical Engineering 57(4), 041407 (1 March 2018). https://doi.org/10.1117/1.OE.57.4.041407 . Submission: Received: 2 October 2017; Accepted: 9 February 2018
Received: 2 October 2017; Accepted: 9 February 2018; Published: 1 March 2018
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