Apparatus for simulating color printing process

An apparatus for simulating a color printing process wherein first, second, third and fourth color separation films formed from a color original are displayed as a color image, comprising:

• a scanner unit including
• a film setting stage for supporting said first, second, third and fourth color separation films in a side-by-side relation;
• a first flying spot scanner tube for said first and second color separation films and a second flying spot scanner tube for said third and fourth color separation films;
• a lens system for projecting a raster image of the screen of said first flying spot scanner tube onto said first and second color separation films and a raster image of the screen of said second flying spot scanner tube onto said third and fourth color separation films;
• and
• a photomultiplier for each of said color separation films, each of said photomultipliers generating a signal corresponding to a subtractive primary color signal;
• control means coupled to said scanning unit for gamma-correcting said subtractive primary color signals;
• color reproduction process means coupled to said control means for converting said gamma-corrected subtractive primary color signals to additive primary color signals;
• and
• a color monitor unit for receiving said displaying said additive primary color signals, said color monitor unit including
• a color cathode ray tube having green, blue and red light-emitting phosphor elements for exhibiting a color reproduction characteristic wherein the coordinates of the green-emitting phosphor elements are approximately X=0.2, Y=0.67 on the chromaticity diagram, the red-emitting and blue-emitting phosphor elements cooperating with said green-emitting phosphor elements to substantially completely reproduce the printing colors;
• and
• driving means for driving said color cathode ray tube at a resolution of between approximately 2.1 and 3 lines per millimeter.