KEYENCE IG Series - Manual (Page 31)

2-2 Connecting and Mounting the Sensor Head
2-9 IG-E
2
In
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onnection
Mounting distance and insertion position of a target
Measurement accuracy changes depending on the mounting distance between the
transmitter and receiver of the sensor head and insertion position of the object.
"5-1 Specifications" (page 5-2)
When the mounting distance is long and the object is far from the receiver, the light
diffraction caused by the object increases. Because of this, the edge of CCD’s light-
receiving waveform generated by the object is skewed increasing measurement error.
To increase the measurement accuracy, make the mounting distance as short as possible
and move the insertion position of the object closer to the receiver.
When the mounting distance is short and the object is close to the receiver
When the mounting distance is long and the object is far from the receiver
Transmitter Receiver Received waveform image of CCD
Object
Transmitter Receiver
Received waveform image of CCD
Object