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PRINTER
November 29, 1999
2-10
Optical Path
The LD unit [A] outputs the laser beam to the polygonal mirror [B] through the
cylindrical lens [C], which focuses the laser beam.
The laser beam goes to the F-theta mirror [D], 1st mirror [E] and BTL [F]. Then, the
beam reaches the drum [G] through the shield glass [H].
The beam reflected by the polygonal mirror writes the pixels of the latent image on
the drum. The F-theta mirror ensures constant intervals between the pixels. The
BTL corrects for irregularities in the polygonal mirror faces.
The laser synchronization detector [I] synchronizes the start of the main scan.
H306D008.WMF
[A]
[B]
[C]
[D]
[E]
[F]
[G]
[H]
[I]