LASER EXPOSURE
17 January, 2003
6-22
6.3.2 OPTICAL PATH
The laser beams for cyan [A] and yellow [B] are directed to the upper part of the
polygon mirror [C], and those for magenta [D] and black [E] are directed to the
lower part of the polygon mirror. The LD mirrors (see the previous page) deflect the
laser beams for magenta and black towards the lower polygon mirror.
The WTL [F] corrects the main scan line; without this component, the line bends
out towards the middle of the main scan. The central bend of the WTL is adjusted
in the factory.
The speed of the polygon mirror depends on the selected mode (see below).
Mode
Resolution
(dpi)
Polygon motor
speed (rpm)
Process line
speed (mm/s)
Print speed
(ppm)
Remarks
600 x 600
1,200 x 600
21,850 185 38
B/W
(except
OHP/Thick
paper)
1,200 x 1,200
29,528
125
28
Dual beam
writing
600 x 600
1,200 x 600
29,528 125 28
Color
(except
OHP/Thick
paper)
1,200 x 1,200
29,528
62.5
14
OHP/Thick
600 x 600
1,200 x 600
1,200 x 1,200
29,528 62.5 10
G080D941.WMF
[A]
[B]
[D]
[E]
[C]
[F]