2G4
2-1-5
2-1-3 Expose section
(1) Laser scanner unit
The charged surface of the drum is then scanned by the laser beam from the laser scanner unit.
The laser beam (780 nm wavelength) beam is dispersed as the polygon motor revolves (27959 rpm) to reflect the laser
beam over the drum. Various lenses and mirror are housed in the laser scanner unit, adjust the diameter of the laser
beam, and focalize it at the drum surface.
Figure 2-1-6Laser scanner unit
Laser beam
Drum
(1) Laser scanner unit
(2) MID frame
(3) LSU lid
(4) LSU shutter
(5) LSU mirror
(6) Polygon motor (mirror)
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