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2.7 Parameter Guide
2.7.1 3D and Intensity Profiles
Figure 54. 3D and intensity profiles
2.7.2 LED Pulse Width
Increasing the LED Pulse Width will increase the optical signal so that weaker reflecting surface areas can also be
seen.
2.7.3 Peak Threshold
The LCI sensor detects the surface and provides a Z height reading and an Intensity reading when the Intensity value
measured exceeds the Peak Threshold value. The range of the Peak Threshold = 0—255.
The Peak Threshold should be as low as possible and as close to the Background signal level as possible to get the
maximum sensitivity.
2.7.4 FIR Length
The FIR Length parameter is used to calculate the exact Z position of the surface. When the FIR Length is large (=16)
the Z- measurement accuracy is the best.
When the surfaces are not transparent, use FIR Length = 16.
2.7.5 FIR Length Setting for Thin Transparent Films and Coatings
A large FIR Length value reduces the capability to distinguish separate thin films. Use a low FIR Length value to
distinguish the layers of thin films in the thickness range 40 µm — 100 µm.
