Optical Path - Ricoh SP5 Series Service Manual

LASER EXPOSURE June 30, 1998

2.4.2 OPTICAL PATH

[A]
[B]
[F]
[E]
[H]
[C]
[D]
[G]
[I]
[J]
A229D522.WMF
The output path from the laser diode to the drum is shown above.
The LD unit [A] outputs two laser beams to the polygonal mirror [B] (six mirrors)
through the cylindrical lens [C] and the 1st mirror [D].
Each surface of the polygon mirror reflects two full main scan lines. The laser
beams go to the F-theta mirror [E], mirror [F], BTL (barrel toroidal lens) [G], and
mirror [H]. Then these laser beams go to the drum through the toner shield glass
[I].
The laser synchronizing detector [J] determines the main scan starting position.
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