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3D Printing in Seconds
02/14/2020 9:38 PM
3D printers actually print in 2D, one layer at a time stacked up to build a 3D object. This may take hours or days to finish an object.
A computer-aided tomography (CAT) scan determines density of a 3D object by taking a series of projections at various angles. A new 3D printer uses this principle in reverse, rotating a container of photosensitive resin while radiating with laser light modulated with a Digital Light Processing (DLP) chip.
"3D printers are great for rapid prototyping and building low-volume, specialized parts, but they sure can take a while. Today's 3D printers might be called "3D printers" but really, the print heads work in 2D. A 3D model is sliced up into hundreds of 2D horizontal layers and slowly built up, one layer at a time. This layer-by-layer process can take hours or even days, but what if we could print the entire model at once? A new technique demonstrated by researchers from Switzerland's Ecole polytechnique fédérale de Lausanne (EPFL)—and further detailed in this Nature article— does just that and can print an entire model in seconds."
3D Printing in Seconds
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