Ricoh A66 - Optical Path; Overview

5.2 OPTICAL PATH
5.2.1 Overview
The output path from the laser diode to the drum is shown above.
The LD unit [A] outputs the laser beam to the polygon mirror [G] through the
cylindrical lens [H].
The polygon mirror reflects a full main scan line with a single surface of the
mirror. The laser beam goes through the f-theta lens [B] and the barrel
Toroidal Lens (BTL) [C].
The drum mirror [D] reflects the laser beam to the drum [I] through the toner
shield glass [J].
The laser synchronizing detector boards [E, F] determine the main scan
starting position, and detect variations in the time required to make a main
scan.
[D]
[E]
[J]
[I]
[H]
[G]
[F]
[A]
[B]
[C]
LASER EXPOSURE
A166/A187/A189 2-66 SM