Ricoh Aficio Color 3006 Service Manual page 107

LASER EXPOSURE 24 February, 1999
[B]
[C]
[A]
A259D102.WMF
Cylindrical Lens
The cylindrical lens [A] focuses the laser beam and sends it to the polygon mirror.
Polygon Mirror
The polygon mirror assembly consists of the polygon mirror motor [B] and the
polygon mirror itself [C].
As the mirror rotates, it reflects the laser beam across the drum, via the f-theta
lens, BTL, and drum mirror. The beam reflected from one face of the polygon
mirror makes one main scan line.
The mirror is precisely ground for high reflectivity and to prevent pixel misalignment
on the drum in both the main scan and sub-scan directions.
The polygon mirror motor rotates at 24,567 rpm. One rotation corresponds to six
main scans.
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