Somewhat related but I just remember when Numega had a color image digitizer with a black and white camera and color filters for the Amiga. I guess the idea is

Somewhat related but I just remember when Numega had a color image digitizer with a black and white camera and color filters for the Amiga. I guess the idea is very old because IIRC the very first color photos were taken that way. And speaking of projectors - I think there were projectors / projection TVs that used three black and white CRTS with filters that were merged to produce the final image. Could be higher resolution that way.