Patent ID: 6888654

Claim:
A laser scanning unit comprising: a separate upper housing portion and a separate lower housing portion; means attaching said upper housing portion and said lower housing portion to for a housing for said laser scanning unit, a scanning assembly including a scanning device; a first light beam source directing a first light beam toward said scanning device; a second light beam source directing a second light beam toward said scanning device; and first and second post-scan optical assemblies located to receive first and second scanning beams reflected from said scanning device, each said post-scan optical assembly comprising a first, second and third fold mirror, a first f-theta lens located between said first and said second fold mirrors, and a second f-theta lens located to receive light reflected from said third fold mirror and output a compensated scanning beam for generating a scan line on a corresponding photoconductive member, each said first and second fold mirror and said first f-theta lens being mounted in said upper housing portion and each said fold mirror and said second f-theta lens being mounted in said lower housing portion.