Journal
OPTICAL ENGINEERING
Volume 57, Issue 4, Pages -Publisher
SPIE-SOC PHOTO-OPTICAL INSTRUMENTATION ENGINEERS
DOI: 10.1117/1.OE.57.4.041407
Keywords
selective laser sintering; optical coherence tomography; additive manufacturing; process monitoring
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Funding
- NIH T32 training grant [EB007507]
- General Dynamics Information Technology, Inc.(GDIT) PO [08ESM753983]
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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. (C) 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
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