Holographic printer produces 3D shapes in one shot

University of Utah researchers have demonstrated a new method of 3D printing that avoids the leaky seams that come with the layer-by-layer process. Using a nanoscale “mask” that diffracts laser light into a holographic pattern of the desired shape, it fuses its print material solid in one shot. The process takes about 20 seconds, a stark contrast to the hours other laser-based printing methods can take.