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5 March 2021 Modeling of light propagation in computed axial lithography with photopolymers
Hayden K. Taylor, Joseph Toombs, Sui Man Luk, Samira Feili, Hossein Heidari, Chi Chung Li, Vishal Bansal, Kevin Coulson, Elyas Goli
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Proceedings Volume 11698, Emerging Digital Micromirror Device Based Systems and Applications XIII; 1169807 (2021) https://doi.org/10.1117/12.2580631
Event: SPIE OPTO, 2021, Online Only
Abstract
Computed axial lithography (CAL) is a volumetric additive manufacturing method in which a three-dimensional light dose distribution is constructed in a photopolymer from the superposition of illumination patterns from many different angles. The technique’s advantages over layer-by-layer light printing methods stem from the fact that in CAL hydrodynamic stresses are effectively eliminated from the resin precursor material during printing. This key difference allows a wider range of materials to be processed, including high-viscosity or thermally gelled precursors, and allows polymeric objects to be printed around pre-existing solid objects (‘overprinting’). In this talk we describe some of the current limitations on spatial resolution, printing speed, and mechanical properties in CAL. We also describe a computationally efficient approach to modeling the occlusion of light by objects suspended in the printing volume, which supports the optimization of overprinting processes.
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Hayden K. Taylor, Joseph Toombs, Sui Man Luk, Samira Feili, Hossein Heidari, Chi Chung Li, Vishal Bansal, Kevin Coulson, and Elyas Goli "Modeling of light propagation in computed axial lithography with photopolymers", Proc. SPIE 11698, Emerging Digital Micromirror Device Based Systems and Applications XIII, 1169807 (5 March 2021); https://doi.org/10.1117/12.2580631
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KEYWORDS
Printing
Lithography
Photopolymers
3D modeling
Optimization (mathematics)
Oxygen
Polymers
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