Probably not original, but I'm surprised more solar implementations don't use a simple passive fresnel lens for a concentrator. Seems like a no-brainer for solar-thermal, and possibly a good idea for PV too, as long as the PV units are capable of handling the extra heat and energy; but I know nothing about PV tech.
Worked on thermophotovoltaic cells back in the '90s and holy fuck did we have lensing. It's really easy with a fresnel to push surface temperatures into "rapid mechanical breakdown" territory. I had a bitchin' 9x11" one as a kid that would not only fry ants, but if you held it right you could crack concrete like popcorn. That shit breaks down electronics about as fast as it breaks down ants. If you're going to concentrate light like that, it's much easier to pump it into a heliostat. In fact, that's pretty much a heliostat in a nutshell.