Patent ID: 6917447

Claim:
Apparatus for producing a color composite image on a target surface of photosensitive material extending in perpendicular lateral and longitudinal directions, said apparatus comprising: a source of digital signals describing said composite image; an imaging head comprised of a plurality of light sources including a first group of light sources and a second group of light sources; said first group including a plurality of light sources respectively exhibiting spectral outputs within a first spectral band; said second group including a plurality of light sources respectively exhibiting spectral outputs within a second spectral band; said imaging head being mounted proximate to said target surface; a controller responsive to said digital signals for selectively energizing said light sources to image substantially identically shaped pixels onto said target surface to form said composite image, said composite image being formed of multiple longitudinally displaced pixel rows wherein each row is comprised of laterally displaced pixel images; a first filter mounted between the light sources of said first group and said target surface, said first filter exhibiting a narrow pass spectral transmission characteristic within said first spectral band for causing said photosensitive material to respond substantially uniformly to said light sources of said first group; and; a second filter mounted between the light sources of said second group and said target surface, said second filter exhibiting a narrow pass spectral transmission characteristic within said second spectral band for causing photosensitive material to respond substantially uniformly to said light sources of said second group.