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21 February 2018 3D printing of optical materials: an investigation of the microscopic properties
Luana Persano, Francesco Cardarelli, Arkadii Arinstein, Sureeporn Uttiya, Eyal Zussman, Dario Pisignano, Andrea Camposeo
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Proceedings Volume 10529, Organic Photonic Materials and Devices XX; 105290V (2018) https://doi.org/10.1117/12.2290495
Event: SPIE OPTO, 2018, San Francisco, California, United States
Abstract
3D printing technologies are currently enabling the fabrication of objects with complex architectures and tailored properties. In such framework, the production of 3D optical structures, which are typically based on optical transparent matrices, optionally doped with active molecular compounds and nanoparticles, is still limited by the poor uniformity of the printed structures. Both bulk inhomogeneities and surface roughness of the printed structures can negatively affect the propagation of light in 3D printed optical components. Here we investigate photopolymerization-based printing processes by laser confocal microscopy. The experimental method we developed allows the printing process to be investigated in-situ, with microscale spatial resolution, and in real-time. The modelling of the photo-polymerization kinetics allows the different polymerization regimes to be investigated and the influence of process variables to be rationalized. In addition, the origin of the factors limiting light propagation in printed materials are rationalized, with the aim of envisaging effective experimental strategies to improve optical properties of printed materials.
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Luana Persano, Francesco Cardarelli, Arkadii Arinstein, Sureeporn Uttiya, Eyal Zussman, Dario Pisignano, and Andrea Camposeo "3D printing of optical materials: an investigation of the microscopic properties", Proc. SPIE 10529, Organic Photonic Materials and Devices XX, 105290V (21 February 2018); https://doi.org/10.1117/12.2290495
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KEYWORDS
3D printing
Photopolymerization
Ultraviolet radiation
Printing
Confocal microscopy
Spatial resolution
Refractive index
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