Sensor principles
The scanner has two types of sensor:
●
Mirror Sensor (Optical): The Optical sensor contains an LED that sends a beam of infrared light towards
the Multi-Sheet Tray, and an infrared detector which measures how much of that light bounces back to
the sensor:
●
Magnetic sensor (Lid magnetic): This sensor is based on the Lid magnetic. When a magnet approaches
the sensor, a current is induced in the sensor and it can be used as a detector.
CIS scanning technology
Contact Image Sensors (CIS) are image sensors used in atbed scanners in direct contact with the object to be
scanned. A CIS typically consists of a linear array of detectors, covered by a glass, and anked by red, green,
52 Chapter 1 Printer fundamentals ENWW
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