Optical Housing Unit; Optical Path - Ricoh G108 Service Manual

6.3 OPTICAL HOUSING UNIT

6.3.1 OPTICAL PATH

[A]
[B]
[C]
[D]
[E]
The laser beam moves as follows:
1. The laser diode unit [D] emits the laser beam.
2. The cylinder lens [E] condenses the laser beam.
3. The polygon mirror [I] reflects the laser beam.
4. The F-theta (F-θ) Lens [G] focuses the laser beam on the first mirror.
5. The first mirror [B] reflects the laser beam.
6. The second mirror [H] reflects the laser beam.
7. The barrel toroidal lens [F] focuses the laser beam on the third mirror, and
ensures uniform pixel spacing and diameter.
8. The third mirror [A] reflects the laser beam.
9. The fourth mirror [C] reflects the laser beam.
SM
OPTICAL HOUSING UNIT
G108D911.WMF
6-11
[F]
[G]
[H]
[I]
G108