I think it's possible. The same basic thing that happens in the front of a tv is happening in a nv scope only in one color. Green is simply in the center of the spectrum of visible light, the amplifier sees visible and ir light and turns it into a stream of e- The amped particles hit the phos screen. since theyre all the same its monochromatic. the phos screen is the middle man between your eye and the electrons. Thescreenisgreen for this reason; green's easy for us to see. thats all.