Scientists at the Vienna University of Technology have built a 3D printer capable of making exquisitely intricate objects as tiny as a grain of sand, but its not the size of the objects thats novel, its the speed at which theyre made which is unique. Via a process known as two-photon lithography, the printer uses liquid resin which contain molecules that cause the liquid around them to harden into a polymer as theyre exposed to laser light. So, you ask, how is that different from traditional stereolithography? In order for this special polymer to be activated, the molecules require the absorption of two photons of light at once.
Posted on: Thu, 23 Jan 2014 17:07:03 +0000
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