The project starts with the assumption that it is not possible to get a laser grid. There are ways around this, e.g. laser with a DMD device. There is also research into nano-lasers; which could possible form a laser led screen. All these technologies have their limitations, due to cooling, diffraction or focusing of the laser. A way around this is moving the laser bundle either by mirrors or prisms. Rotating prisms have a lower cross-scan error and require simpler optics than rotating mirrors. The initial idea of using prism for laser scanning originates from Dr. Jacobus Jamar and was developed at TNO. The Netherlands is especially interested in lithography due to the regional importance of ASML. This first system moves a plurality of laser bundles with a thicker prism under an angle, see US10114289B2 The original system is shown below;
The patent has a loop hole as claim one specifies a plurality or more than one bundle is moved by a prism. Rik Starmans realized a single laser bundle per prism would make the system more cost-effective. Luckily, Henner Zeller had a already developed an open-hardware laser scanner for a rotating mirror. This system was used to create a proof of concept version on the beaglebone. Rik Starmans won 3000 USD in the Hackaday Prize 2019 using the system. A microcontroller was however seen as too limiting for further development. The system therefore moved to Nmigen and uses some components from luna.