The biggest display hurdle to be overcome revolves around 
					the required optical chain, a issue CRF have taken steps to 
					resolve. "The OEDIBUS display chain is very small, and the 
					whole system occupies less than 0.5 litres," continues 
					Repetto.
					
					"We use holographic technology to couple the light 
					into and out of the HUD combiner. Light propagates through 
					the material of the combiner and a set of holographic 
					diffraction gratings is used to relay the image from a 
					state-of-the-art microdisplay to the driver’s eye."
					 
					
					"This HUD concept is a real breakthrough. It's a 
					completely new way of making HUDs. It's very comfortable for 
					drivers, too; there are only limited restrictions on their 
					viewing position.
					
					"And because it produces a virtual image, 
					drivers don't have to change their focus when they look at 
					the display panel mounted on top of the instrument cluster," 
					concludes Repetto, who expects this new system to become 
					available on production models from 2008 onwards.