The Vienna University of Technology has made a major breakthrough in the world of 3D printing. With incredibly fine details (nanoscale) it is now possible to print three dimensional objects using two-photon lithography.
The specially designed printer uses a liquid resin which is hardened by a focused laser beam precisely on the correct spots. The focal point of the laser beam is guided through the resin by movable mirrors and leaves behind a polymerized line of solid polymer, just a few hundred nanometers wide.
Due to this high resolution this printer makes it possible to create structured sculptures the size of a grain of sand. The big difference of this two-photon lithography printer compared to its already excising competitors is that the printing speed used to be measured in millimeters per second. This device can do five meters in one second. In two-photon lithography, this is a world record.
The next video shows the fabrication of a race car with dimensions 330x130x100µm3. It is finished in 4 minutes and resembles the CAD file at a precision of ±1µm.