Exposure - Kyocera KM-1820 Service Manual

(3) Exposure

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 (polygon mirrors) revolves to reflect the
laser beam over the drum. Various lenses and mirror are housed in the scanner unit, adjust the diameter of the laser
beam, and focalize it at the drum surface.
Laser scanner
unit
Figure 2-1-11 Exposure
Drum
2GM
2-1-11