Construction Of The Contact Sensor (Cs) - Canon iR1600 Service Manual

CHAPTER 3 IMAGE READING/PROCESSING SYSTEM

4.2.2 Construction of the Contact Sensor (CS)

The CS has the following construction:
The LEDs used to expose an original are grouped in two (R, G, B), and are mounted to
the edge of a photo conducting medium made of transparent glass. When an original is
exposed, the LEDs (all three colors) go ON, and their light is directed to the original by
way of the photo conducting medium. The light reflected by the original is collected by
the rod lens array and detected by the CCD array, which will convert the light into electri-
cal signals (photo-electric conversion) for output.
The CCD array is made up of 11 CCD device units, which are grouped into 4 systems
in terms of control: 3 units x 3 systems and 2 units x 1 system; all systems are used to
read an image or generate image signals at the same time, thus enabling high-speed op-
eration.
Analog image data
(OS1~OS4)
3-10
F03-402-02
COPYRIGHT© 2002 CANON INC.
Read start signal
Clock signal
Sensor drive voltage
2000 CANON iR1600/iR2000 REV.1 JAN. 2002