Scientists have used holographic projections to bring unprecedented resolution to a light-based 3D printing technique. The method allows the fabrication of millimeter-scale objects within seconds using significantly less energy than previous approaches.
While traditional 3D printers work by depositing layers of material, tomographic volumetric additive manufacturing involves shining laser light at a rotating vial of resin until it hardens where accumulated energy exceeds a certain threshold. An advantage of TVAM is that it can produce objects in a matter of seconds, compared to around 10 minutes for layer-based 3D printing.
This small change has a big impact."All pixel inputs are contributing to the holographic image in all planes, which gives us more light efficiency as well as better spatial resolution in the final 3D object, as the projected patterns can be controlled in the projection depth," Moser summarizes.
"We are interested in using our approach to build 3D complex shapes of biological structures, allowing us to bio-print, for example, life-scale models of tissues or organs," says Alvarez-Castaño. "The holographic addition to TVAM technology sets the stage for the next generation of efficient, precise, and rapid volumetric additive manufacturing systems," he summarizes.A new method enables researchers to analyse magnetic nanostructures with a high resolution. The new method achieves a resolution of around 70 nanometers, whereas normal light microscopes have a ...
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