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COPYRIGHT © 2005 CANON ELECTRONICS INC. CANON DR-2580C FIRST EDITION APR. 2005
CHAPTER 2 FUNCTION & OPERATION
2. Configuration
1) Reading
System
The color CCD sensor with 5340 picture
elements
×
4 lines is used as an image
sensor. The size of a picture element is
7
µ
m
×
7
µ
m. And the picture elements are
arranged with 7
µ
m pitches. The length of
a line is about 37.4 mm.
* CCD
censor
RED
GREEN
BLUE
GRAY
Figure 2-701
The unit, which consists of the CCD PCB
with the CCD sensor, 4 mirrors, lens, and
xenon lamp as a light source, is called
“optical unit.” Since this unit is adjusted
before the shipment from a plant, do not
disassemble the unit except for the lamp
in the field.
The images of a document are reduced by
the optical unit. And then, the 600dpi im-
age data with 5104 effective picture ele-
ments (length: 210 mm) are output from
the CCD sensor.
The shading plate for shading correction
is slipped between the document board
glass and cover.
Document board glass
Mirror 3
Mirror 2
Mirror 1
Mirror 4
Optical unit
CCD
Lens
Lamp
Shading plate
Figure 2-702
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