Ricoh VT3500, Руководство по обслуживанию

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[Light Source]
A high frequency (15 kHz) fluorescent lamp [D] is used as a light source for
high speed reading. The light is reflected at two angles using a mirror [F].
This prevents shadows from the edges of cut-and-paste originals from
appearing on the original [B]. The original guide plate [C] blocks part of the
direct light from the fluorescent lamp to make the light intensity of both the
direct light and reflected light the same. A heater [E] is wrapped around the
fluorescent lamp. The lamp stays on for one minute when the main switch is
turned on to quickly raise the lamp temperature. This prevents a loss in light
intensity that would occur if the temperature were too low.
[Platen Cover]
The CCD reads the platen cover [A] to obtain a standard white level before
the original is read. The standard white data are used to correct for distortion
such as bright or dull spots in the light path (lamp, reflectors, exposure glass,
mirrors, lens, and CCD).
[A]
[B]
[C]
[D]
[F]
[E]
1 December 1993
2-14