CIS Technology
Example of a CIS Element, Contact Image Sensor:
The CIS Element consist of 3 major parts:
●
Sensor
●
Lens
●
Light source
The Light source is 3 RGB LEDs that are lit one at a time. The sensor consists of 10368 individual
monochrome sensors.
The purpose of the lens is to channel the light from the “pixels” on the image to the sensors. There is no
magnification in the lens (1x1).
Due to the very short focal length, the focus depth is limited. The original has to be in contact with the
surface of the glass plate in order to be in focus.
The LED’s flash one at a time, capturing one color at a time.
ENWW Theory of operation 33
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