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8 June 2023 A light-driven light valve for metal additive manufacturing
Selim Elhadj, Zoey Davidson, Yasaman Sargol
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Proceedings Volume PC12584, Smart Materials for Opto-Electronic Applications; PC1258402 (2023) https://doi.org/10.1117/12.2665533
Event: SPIE Optics + Optoelectronics, 2023, Prague, Czech Republic
Abstract
An optically addressable light valve is used for high repetition rate dynamic laser beam shaping used in a unique metal additive manufacturing process [1]. The resulting Area Printing™ delivers high power pulses - each with an individually controlled shape - to a metal powder bed that locally sinters and melts to consolidate into a fully dense metal part. This technology and device enable scaling cheaper additive manufacturing with high spatial resolution, while capable of printing part features beyond reach of conventional manufacturing, and with greater efficiency and minimal spatter defects. We address here the unique optoelectronic properties needed from the optically addressable photoresistor that controls the dynamic beam shaping for high density, high-resolution laser 3D printing. Further description is presented of the device-level thermomechanical analysis from parasitic absorption of the laser at kW to MW power levels. We thus highlight key areas of semiconductor properties challenging the performance capabilities in optically addressed light valves used in high power switching applications. [1] https://www.seurat.com/area-printing
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© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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Selim Elhadj, Zoey Davidson, and Yasaman Sargol "A light-driven light valve for metal additive manufacturing", Proc. SPIE PC12584, Smart Materials for Opto-Electronic Applications, PC1258402 (8 June 2023); https://doi.org/10.1117/12.2665533
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KEYWORDS
Additive manufacturing
Metals
Light valves
Optics manufacturing
Printing
Semiconductors
Spatial resolution
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