Ricoh A230, Руководство по обслуживанию, Страница: 64 / 1134

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SCANNING
2-1
A230/A231/A232 SM
2. DETAILED SECTION DESCRIPTIONS
2.1 SCANNING
2.1.1 OVERVIEW
The original is illuminated by the exposure lamp (a xenon lamp in this model) [A].
The image is reflected onto a CCD (charge coupled device) [B] via the 1st, 2nd,
and 3rd mirrors, and through the lens [C].
The 1st scanner [D] consists of the exposure lamp, a reflector [E], and the 1st
mirror [F].
The exposure lamp is energized by a dc supply to avoid uneven light intensity
while the 1st scanner moves in the sub scan direction (down the page). The entire
exposure lamp surface is frosted to ensure even exposure in the main scan
direction (across the page).
The light reflected by the reflector is of almost equal intensity in all directions, to
reduce shadows on pasted originals.
An optics anti-condensation heater [G] is available as an option. It can be installed
on the left side of the scanner. It turns on whenever the power cord is plugged in.
A230D101.WMF
[A]
[B] [C]
[D]
[E]
[F]
[G]