KEYENCE IG Series - Manual (Page 103)

4-3 Setting the Measurement Sensitivity
4-45 IG-E
4
Setting V
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When the filter value is increased, the measurement tends not to be influenced by dirt stuck
to the glass cover of the laser transmitter/receiver. When the filter value is decreased, small
objects are stably measured.
When the filter value in the "Standard mode" is 9, only if the light-blocking part of CCD
continues 9 pixels or more, it is judged as blocked. Also, only if the light-entering part of
CCD continues 9 pixels or more, it is judged not blocked.
Filter Value
Reference • If the filter value is increased by 1, the light-blocking part and light-entering
part of CCD ignored will be increased by 1 pixel (approx. 0.014 mm).
• Depending on the light diffraction caused due to the mounting distance or
measurement position, the size of the object actually ignored changes.
(example) Filter value: 5
The blocked light only covers four pixels
and will be judged as received light. The light blocked covers 5 pixels and will be
judged as a blocked area.
Receiver
Received light
1 2 3 4
CCD
Transmitter
Receiver
Received light Received light Blocked light
CCD
Transmitter
1 2 3 4 5