Panasonic HG-T Series User Manual page 88

■ Judgment filter
Judgment filters can make measurement less affected by dirt and other foreign objects adhering
to the glass cover of the sensor head emitter or receiver.
For judgment filter "3", only when at least three consecutive pixels appear as the light intercep-
tion part of the sensor head receiver, the receiver is judged to be in a light interception state and
the edge position (measured value) is calculated. When dirt adheres to the emitter or receiver,
measurement can be continued unless at least three consecutive pixels appear as the light in-
terception part.
If the filter value is too large, small objects cannot be measured.
<For judgment filter "3">
Judged to be light entry, as only
two consecutive pixels appear
in the light interception section.
5-44
Emitter
Dirt
Receiver
1 2
Light entry
Emitter
Dirt
Receiver
1 2 3 1
Light Light Light
entry inter- entry
ception
Light interception range
Measured object
1 2 3 4 5 6
Light interception
Judged to be light interception, as three
or more consecutive pixels appear in
the light interception section.
Measured object
2 3 4 5 6
Light inter-
ception
Judged to be light interception, as three
or more consecutive pixels appear in
the light interception section
Basic Usage
WUME-HGT-3