Ricoh C211 Service Manual page 418

2. Light Source
[D]
\
[C]
Form
Lamp
[B]
: 15.50x436 mm
!
Voltage : 59k6V
[E]
~F]
[A]
[G]: Exposure Glass
[H]: Lens
[1]: CCD
[J]: A/D Convertor
[K]: Mirror
SS950
[D]
f
&
>
[B]-
Form : 25.50x436 mm
1
[K{
'[A]
\
[J]
SS830
( SS950 )
The high frequency fluorescent lamp [A] is used as a light source for the high speed
reading of 16 pixels/mm.
The light exposes at two angles using a sub mirror [B] to
prevent the shades at the edges of paste-ups on the original [C]. The original guide
plate [F] blocks par&of the direct light from the fluorescent lamp to make the light inten-
sity of both direct and reflected light the same.
A heater [E] is wrapped around the
fluorescent lamp. It prevents light intensity reduction due to low temperature.
( SS830 )
The fluorescent lamp [A] is used as a light source for the reading of 12 pixels/mm. The
light exposes at two angles using a sub mirror [B] to prevent the shades at the edges of
paste-ups on the original [C]. The original guide plate [F] blocks part of the direct light
from the fluorescent lamp to make the light intensity of both direct and reflected light the
same.
c Fluorescent
Lamp>
- Platen Cover -
The platen cover [D] is used as a standard white level reference to correct for shading
distortion.
2-8