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Ricoh Co. Ltd.
http://www.ricoh.com/
Document Scanning
This machine uses a dual scanning system: ADF scanning and
flat-bed scanning.
In ADF scanning, the document moves past the stationary CIS
unit. (M103 only)
In flat-bed scanning, the CIS moves under a stationary
document. (M102/M103)
CIS is stationary
during ADF scanning.
CIS moves
during flatbed
scanning
More on scanning
ADF scanning: Document moves across stationary CIS unit
¾
Placing a document
face up
in the document support activates the
document set sensor, switching to ADF scanning.
¾
The CIS unit first moves to the white-level reference film for white level
compensation and then to the ADF scanning position. The ADF motor then
rotates the document pick-up roller to pull the document into the ADF.
¾
The document separation roller feeds the pages one at a time,
starting
from the top,
to the document feed roller, which feeds the sheet through
the ADF. The page is scanned as it passes over the CIS unit. The
document is then ejected
face down
on the document cover. Subsequent
pages are ejected on top of previous pages, preserving document page
order.
Flat-bed scanning: CIS unit moves under stationary document
¾
The user places a document
face down
on the exposure glass and closes
the document cover.
¾
The CIS unit first moves to the white level reference film for white level
compensation. It then moves right, scanning as it goes. It returns to its
home position after the scan.
CSI Operation Details
The CIS (contact image sensor) is a compact image reading assembly.
Refer to the Core Technology manual for details of CIS structure and operation.