Coelux is an Italian academic spin-off company that is launching a new line of artificial skylights. The images are impressive, but there is almost no technical information at the moment: All I can find is “based on nano-structured dichroic materials“.
Here is the link to the original “SkyCoat” research project.
I would guess that the technology is a few light-guide plates stacked on each other, one producing the blue diffused light, the second producing the apparent sun, the third producing the directional beam of sunshine. Perhaps they are embedding dichroic particles or coatings on one of the layers.
But I guess we will have to wait to find out…
From their website:
CoeLux Srl is a hightech spin-off of Insubria University at Como, Italy, founded by Professor Paolo Di Trapani, and is headquartered in ComoNext technology park, a site created by the Como Chamber of Commerce with the aim of creating an incubator environment to promote the growth and competitiveness of local businesses with high innovation capabilities. CoeLux® is a research project funded by the European Union under the 7th Framework Program for research and development. The validity of the results were confirmed by the European Commission which selected CoeLux as one of the 12 most technologically innovative projects in Europe, and hosted it at the “Innovation Convention” 2014 in Brussels.