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Temperature of the material
Due to the given specification of the SLS sensor it has a maximum temperature
coefficient of 200 ppm. That is for the SLS sensor housing temperature. The
temperature of the object does not affect the accuracy at all within the given
specifications.
Advise. The SLS sensor system will measure the actual thickness of the hot
material. Be sure to take into account the temperature expansion effect when
comparing with other measurements.
Geometry of the material. Secondary reflections
The SLS sensor position data is given by the center of gravity of laser light on the
detector. The laser light must origin from the laser spot on the surface. If laser
light scattered from the spot reaches the detector via a secondary reflection that
may affect the reading.
In most cases the phenomena can be avoided by orienting the SLS sensor
according to the figure below.
Scan
Profiling
WRONG CORRECT
Figure 31: Sensor orienteering
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