Ricoh V-C3 Technical Training Manual page 292

Optical Path – F-theta Lens to Drum
F-theta
Lenses
! F-theta Lens → → → → 1st Mirror (C and M only) → → → → WTL → → → → 2nd Mirror → → → → 3rd
Mirror → → → → Dust Shield Glass → → → → Drum
Slide 292
# Each beam has a separate set of five components between the f-theta lens and
the drum.
WTL
# The WTL ensures that the main scan goes straight across the drum.
# Without this lens, the main scan would bend out at the centre.
# The lens is adjusted at the factory (a screw bends the lens out at the middle). It
cannot be adjusted in the field.
# There is one of these for each color.
# What does WTL mean?: The 'W' stands for a long and complicated Japanese
word (wankyoku-jiku-gata - bent axis type). If you need an English name,
'warped' is close enough. The TL part means 'toroidal lens'.
Third mirror
# The machine adjusts the angles of the third mirrors for Y, C, and M to make sure
that there is no skew relative to the main scan line for black. This adjustment is
part of the MUSIC process.
C
Y
292
M
K
V-C3 Training