Yep, the LED's they used where: Kingbright L-7113UVC. That particular LED has a 20 degree "beam", they put 24 of them in a grid ~32mm appart. The distance from the LED to the PCB where 80mm and exposure time around 6min. Or so the claim...
/Henrik Olsson.
----- Original Message ----- From: "Leon Heller" <leon.heller@...> > Elektor had an article on a unit like that, for PCBs up to single Eurocard > size. > > Leon